[Tut/DIY] USB solar panel charger with internal backup battery - General Accessories

As an electrical DIY noob, I decided to build myself a decent solar charger for my HD2.
Having a renewable energy source for your mobile device is surely useful and cool, yet if you want to buy "ready" solutions, either you need to be ready to spend a lot of money for decent setups, or spend very little to get useless boxes that are not as half good as an additional spare battery, which maybe is cheaper than that.
A solar charger is only as powerful as the solar panel it's built around, and the few-dollars chargers you can buy from China off ebay have very small solar cells that are capable of outputs that range from 20mA to 70mA... what's that good for, if my HD2 drains little more than 100mA while reading manga, about 130mA while listening to MP3 with wired headphones, and little less than 300mA while watching Frasier, and that at the lower backlight settings, too (or with display turned off while listening to music).
A good solar charger should be able to sustain the working device, charge the device's battery, and also charge its own internal backup battery, all at the same time (as long as there's enough light around), so that when sunlight isn't available anymore, both batteries are as full as possible to keep you working.
We are looking for a multihundred mA output for that.
So I bought a 700mA 5V panel and built my own charger, this is what it looks like:
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And this is the step-by-step guide to make something that looks the most like it:
How to build a solar panel charger with Li-Ion battery backup and USB output
Enjoy, and give ideas/suggestions if you feel like it!

..small but important point : never ever apply a soldering iron to an lion battery, this can be highly dangerous....use some kind of holder instead.

Yeah I kind of suspected that while doing it, yet I survived to tell the story
I learned not to do that mainly because it's too dam hard to have the surfaces tinned, so if there is the risk of an explosion as well, all the more reasons to avoid it

That is awesome - and you make it look so simple. I must have a go at this. I think a trip to maplin's is called for.
Electronics is not my stuff so here we go with the silly questions:
What's the battery for? Is this so that you can use the HD2 whilst it is charging? Could you just find a solar panel with a bigger current rating (as long as it's not too big)?
I am failing with the PCB - is there anything by default that we could pick up in a Maplin or a Radio Shack etc? Do we need one board or two? How do they connect? How do we hide them.
I'm sure I'll have more questions.

lol quite some enquiries you got there
The battery is to "save" the excess energy that's too much for the phone. The HD2 is not at all likely to drain more than 400mA at any time during use, so all the rest of the available power will be sent to the internal battery, which will save even more energy to give it back during the night. It's sort of a battery pack this way.
If you go on ebay and buy a "protected" 18650 battery, you probably won't need the PCB at all, since you can attach it to the solar panel output directly... anyway, no need to buy the PCB, this is thought as a low budget project, you must have lying somewhere a desktop charger for 3.7V batteries that you don't use, just take the PCB out of it, they are all good.
You're unlikely to find 5V solar panel rating higher than 700mA, I got mine off a chinese seller on ebay. You don't really need it anyway, 700mA is already overpowered for a smartphone.

Need Help with this project
I need help with this project.For the pcb can i use the pcb from a phone charger ? take apart the charger and use what's inside? because they normally give out 5v and charge li-ion batterys. if not can someone recommend something which i can open which will have a decent pcb such as a ipod charger for example.
Also can someone recommend somthing which i can open up which will have a li-on battery 3.7v with 3000mah or more.
Also i dont understand the part which you short the usb wires. how do you do that?
does anyone one have any feedback if they have already made this on how to improve it in anyway?

This is nice, i must build one for my self.

Outstanding, ephestione!
How much did you pay for the stuff you used=?

I just paied for solar panel and battery (maybe around 17USD, cannot remember, prices are higher now ), the rest I scavenged from old stuff

Nice work man, I always like DIY-work

laurenz4 said:
..small but important point : never ever apply a soldering iron to an lion battery, this can be highly dangerous....use some kind of holder instead.
Click to expand...
Click to collapse
May I add to this that any connections should be rock solid as sparks can cause havoc with electronic equipment.
Lovely job, well done It is over a year old now, are you still using it?

Thank you all for appreciations
This guide has become the new star of my blog, after my 12-year-old guide on how to synch DivX subtitles
Actually, and I can be totally honest, I NEVER used it! I mean, apart from testing it, it's been sitting on my desk for ages. I made it for hiking purposes, but I never hike, so I suppose I actually made it just for the sake of having fun.
In the meantime, the battery died of unrecoverable discharge, since I left it alone for months, and is now dead, so I took it out and have a plain solar panel with diode and USB port
But it's comforting to know that I can use it as a emergency charger, just in case

Excellent!
No need then to work out how much money you have saved annually
You started with a loss and it went downhill from there.
Thanks for your honest reply and good luck on your next project

Ahah, can I still be honest? Even knowing how it ended, if I were to go back in time I would still buy that solar panel and build this project. Hell, knowing how much prices rose since then, I would buy TWO of the same panels

Dude thats actually a pretty nice setup. I have seen those panels on ebay before but most of them are really undersized / underpowered. Cool

Yup, no point in investing your time into the building if you don't have a decent panel, the results won't repay themselves

ephestione said:
Yup, no point in investing your time into the building if you don't have a decent panel, the results won't repay themselves
Click to expand...
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You are going to have to get a bigger panel for your new galaxy Note.
How is it going with it? it looks great.

errr eheh I haven't used my creation very much, not even with the HD2
Maybe a day will come when I plan to hike in the desert or something like that, and finally this toy will have a purpose

ephestione said:
errr eheh I haven't used my creation very much, not even with the HD2
Maybe a day will come when I plan to hike in the desert or something like that, and finally this toy will have a purpose
Click to expand...
Click to collapse
LOL I meant how is the galaxy note? Unless you ARE talking about it

ahhh, that was an OT question after all
No I wasn't talking about it
Anyway, as anything new, after being so confident with something you've been attached to for a couple of years, it took some adjusting. Not to the size, that was the easiest thing to get used to, now the HD2 looks too small.
I mean the software; being accustomed to CyanogenMod means you're going to feel weird in touchwiz'ed android; and the battery. 2500mAh is double the 1230mAh of the HD2, I'd expect way better than what it achieves, and I have no background services, ever, not counting the 30 minutes of wifi scheduled in the morning to get new emails (I have no data plan).
But I'm all into big displays, so I cannot dislike this toy, overall I am happy to have bought it!

Related

Dont need to worry about running out of power anymore!

I bought the same kind of thing for my X10 and loved always having a spare battery on hand. So I got a package for the Arc as well.
I gave the batteries the full charge/discharge cycle and they perform just as good as the original battery Also comes with a USB port and an extra Micro USB cord.
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Pictured: Original Battery on left, aftermarket one on right. The external charger plugs directly into the wall and has a usb port and cable(which charges the Arc fine).
Got it from eBay and it was very affordable.
And... yes I watermarked the image so some douche doesn't steal the image to use
It looks nice, so you get two batteries and a charger. nice what was the price if it?
commodoor said:
It looks nice, so you get two batteries and a charger. nice what was the price if it?
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I got it for just $9.98 US + $2.99 for shipping. Cheap IMO, but they have more auctions. It came with a free capacitive pen thing, but I don't care for it.
http://cgi.ebay.co.uk/Sony-Ericsson...085490?pt=PDA_Accessories&hash=item4cf6708bf2
That is quite cheap. How are you finding the batteries though? Usually cheaper ones usually only have around 80% of their specified rating.
On an unrelated note, last night I actually found out what the word "douche" means. Quite funny
diggedy said:
That is quite cheap. How are you finding the batteries though? Usually cheaper ones usually only have around 80% of their specified rating.
On an unrelated note, last night I actually found out what the word "douche" means. Quite funny
Click to expand...
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They seem to last just as long, if the capacity is less. It is not noticeable. No worries though... I got a spare!
LOL! You learned a new word
diggedy said:
Usually cheaper ones usually only have around 80% of their specified rating.
Click to expand...
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If that.
There's also the potential problem of them not being manufactured with the same quality control etc, so being more at risk of swelling, bursting, over-heating and generally destroying your phone in some sort of horrible burn-y acid-y way...
Step666 said:
If that.
There's also the potential problem of them not being manufactured with the same quality control etc, so being more at risk of swelling, bursting, over-heating and generally destroying your phone in some sort of horrible burn-y acid-y way...
Click to expand...
Click to collapse
Ye, I wouldnt be able to put in a battery like that in my beloved Arc.
I just hate turning off the phone to change the battery.. Imagine the phone can run without a battery for some seconds
larger batteries are better, but you can't find original larger batteries so you have to depend on 3rd party makers...
I'm thinking about Mugen Power batteries now thought they don't have Arc compatible batteries yet... the nice thing about these is they provide larger capacity ( and also bigger size ) but they also make the back cover that can hold the new bigger batteries and they make a lot of them for variety of phones... just take a look at their site !
http://www.mugen-power-batteries.com/
I've looked at Mugen before.
If they release a larger battery for the Arc with a cover that basically fills in the concavity (ie makes the back flat), I will have to give serious consideration to it - if it's a reasonable bump in capacity that is.
If the replacement back were to bulge though, I would rather have shorter battery life and a slinkier phone though...
Step666 said:
If that.
There's also the potential problem of them not being manufactured with the same quality control etc, so being more at risk of swelling, bursting, over-heating and generally destroying your phone in some sort of horrible burn-y acid-y way...
Click to expand...
Click to collapse
kiyu727 said:
Ye, I wouldnt be able to put in a battery like that in my beloved Arc.
Click to expand...
Click to collapse
Well, there are crappy ones and good ones. I have used them (aftermarket) in my X10 without any problems whatsoever, so if you don't trust them then don't buy them. Don't whine and complain about something if you have not used it yourself.
I know what happens if you plug your device by USB all the time, it will break! When it happens to you, you will start a thread to complain about it and I will be here laughing
with all my devices ive purchased a cheap hongchong battery charger with spare chinese battery's. Originally the batteries are as good but after time they dwindle, thats fine though they cost bugger all.
Ive never had issues with swelling, overheating etc but I do not have a habit of overcharging things.
Ive used these style batteries in my diamond,hd2,g1,magic,n1,desire and soon the play.
FrAsErTaG said:
with all my devices ive purchased a cheap hongchong battery charger with spare chinese battery's. Originally the batteries are as good but after time they dwindle, thats fine though they cost bugger all.
Ive never had issues with swelling, overheating etc but I do not have a habit of overcharging things.
Ive used these style batteries in my diamond,hd2,g1,magic,n1,desire and soon the play.
Click to expand...
Click to collapse
Yep, 10 bucks is not very much. You can buy batteries alone for even less
If I want a second battery I'll go for original batteries... but I hate changing the battery ( infact I hate turning off the phone then turning it on again, and what I hate more is adding another battery to what I'm already carrying !! )
that's why I prefer larger batteries, sadly SE and most other manufacturers don't offer these, specially SE for the Arc as I know SE response will be ( larger battery will be larger physically and this will require modifying the back cover to be larger and this will destroy the design of Arc !! ).. I'm okay if that battery will just make the back cover flat, I can live with that... but I can't live with carrying another battery and the hassle of changing the battery...
Each to they're own I guess the one minute to change battery and reboot far outweighs having to place the phone on a charger.. I don't carry a spare its just if I'm at work its 4 pm and my battery is low I don't care because one minute after I'm home its 100% again...
Sent from my R800i using XDA Premium App
Well my experience with 3rd party batteries is they perform well in the beginning but their life time is significant less than originals.
By the way the watermark doesn't stop people from using your picture. If I have to I can remove it within three minutes and no one will notice it was there, but most people don't know how to do so or prefer searching for another picture to use for their own benefit... Best and only way to keep your pictures to yourself is not putting them on internet
Sent from my arc using tapatalk
PollPixx said:
By the way the watermark doesn't stop people from using your picture. If I have to I can remove it within three minutes and no one will notice it was there, but most people don't know how to do so or prefer searching for another picture to use for their own benefit... Best and only way to keep your pictures to yourself is not putting them on internet
Sent from my arc using tapatalk
Click to expand...
Click to collapse
Yeah, but such a large watermark takes time to remove. Removing it and reposting my image gives me all the proof I need of malicious intent. That would allow me to sue the violators ass off. I have caught people before and claimed damages from them, copyright law is on my side because I have that watermark on there in the first place
Hello, i have a question. Here is the 1800mAh battery, is this fake or?
http://cgi.ebay.com/1800mAh-BATTERY..._Accessories&hash=item2a10235567#ht_981wt_802
Thanks for the answer
For $10 that's a really good deal, even if they only last a couple of months

YooBao Power Bank 11200mAh

Anyone using this?
http://yoobao.co.uk/products-page/power-banks/yoobao-long-march-ii-power-bank-11200mah
I am planning to get this, hoping that I can make my Gnex run a full day of use, because currently, full charge and using MiLi Power Crystal doesnt even last 4 Hours of screen on time..
I've been trying to decide how to deal with the "power shortage" since getting the phone when VzW first released it (LTE version). Finally decided to get an external "power bank" like this and searched for alternatives to compare.
Worth reading a number of threads on these. Some brands really seem to disappoint, and others seem credible. I had settled on an 11,000 mah New Trent for about $76. A bit pricey, but I've used it a few times now, and love having a portable extended power source with me that doesn't require always having a fat phone in my pocket. I also read good things about the Yoobao you mentioned in your post -- no complaints that I could find.
I have no complaints about the New Trent -- but I think if I had it to do over, I might lean toward the Yoobao:
I haven't compared measurements carefully, but the Yoobao appears a bit more compact.
The power in port on the New Trent is a round jack -- while the Yoobao takes a standard micro USB power input. That would suggest it will take any of a number of standard chargers, can be charged easily off your laptop, etc.
The Yoobao has dual output ports -- 1a and 2a -- the New Trent has 1 output. Not a big deal, but if you want to charge 2 devices simultaneously, you'll need a splitter.
BTW: at 11,000 mah (assuming that figure isn't overly exaggerated) you're getting about 5 times the power that's available in the OEM extended 2100 mah battery. Add that to the internal battery, and even with heavy use you should get quite a bit of use before having to recharge the phone and power bank. I haven't pushed mine to the limit yet, but I've gone through a couple of days at a time of heavy use, using the external power bank to recharge the Galaxy Nexus, and have yet run down this combination.
In the end -- I think you made a good choice. I'd be interested to see your experience when you try it out.
Jon
I have received this yoobao, but I am not too sure if the gnexus can benefit from the 2A port this power bank has.. So i just leave it on the 1A port
Been using this for months now: http://www.amazon.co.uk/TeckNet®-Du...Blackberry/dp/B000UH46YY/ref=pd_bxgy_ce_img_c
Great device, and even though I carry spare batteries on me, I tend to use this to charge instead. Looks really nice as well!
I have this one, it can charge the nexus full for 3-4 times.
cost me USD 64, you can charge it using miniUSB or MicroUSB, charging input upto 2100mAh, you can charge it faster by connection 2 adapters at the same time to cover the current upto 2100mAh.
output is two standard USB at combine 2100mAh.
The good thing about this battery pack is, i can use the supplied Standard USB to MicriUSB to charge the powerock and most of my mobile phones.
http://usb.brando.com/powerocks-stone-3-power-bank-7-800mah-_p02355c035d15.html
It looks pretty good. Does it feel sturdy? I'm also in the same boat especially with summer on the way. Plenty of trips coming =]
Ziocomposite said:
It looks pretty good. Does it feel sturdy? I'm also in the same boat especially with summer on the way. Plenty of trips coming =]
Click to expand...
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are you asking about the yoobao or powerock, if it's the powerock, it's pretty small for what it is, and is good quality.
the size is about 3"*3"*1"
This is the one I wound up buying: New Trent IMP1000
http://www.amazon.com/New-Trent-IMP...Z64Q/ref=sr_1_1?ie=UTF8&qid=1332601942&sr=8-1
Probably overkill -- 11,000 mah, more than 5 times the juice that the Verizon OEM extended 2100 mah battery has. Works beautifully so far. I charged it up the first night, and have used it a few times when my Galaxy Nexus was getting low:
- in a conference room at a client during a multi-hour session at the end of a long day
- while waiting for a delayed plane to board, when all the "courtesy outlets" near the gate were in use
- while sitting on a couple of long flights and playing various games, reading cached / downloaded new and browsing a couple of docs from work -- hours with the display on
Also left the G-Nex plugged into it and charging while NOT using the phone during parts of my flights, and arrived at my destination with a fully charged phone -- nice!
Again - I haven't tracked the exact time, but with the items above, when I turn the New Trent on, all three charge indicators light up, indicating that it's still holding most of a full charge.
Nicely made, works extremely well, huge capacity -- a bit pricey.
Some comparison points that might make me choose differently if I were to buy again:
- this is a bit chunky: I CAN put it in my pocket, but it's big -- better left in a backpack most of the time. Next time I might opt for something in the 7,000 to 8,000 mah range if it can be closer in size to the phone itself (there are a few nice ones like that on the market in the $50 range).
- only one charging port: I have a Y-cable that let's me charge a couple of devices, but I'd lean toward a device with 2 ports next time
- power input on the device uses a small round jack / plug: jury out on this item. My first thought was that I'd prefer a micro-USB power input so it would be compatible with all my other cables, and I could potentially recharge it off my laptop. HOWEVER I noticed that the device recharges quite quickly, and wondered if perhaps the adapter and cable provides more juice to recharge the New Trent than a standard USB connection does... I'll explore this a bit -- if NOT the case, then I'd definitely lean toward a more standard micro-USB power input connection.
All in all, this has been great for the past month. Works perfectly, has saved me a lot of inconvenience, and has encouraged me to use all the features in my Galaxy Nexus rather than worrying about scrimping on power use. If you find yourself running out of juice or worry about this, I highly recommend getting either this one or some variant. I considered carrying spare internal batteries with me, but I'd rather not make a routine of popping the phone open constantly - much prefer just plugging in the extra power cable when needed, especially since it typically only needs to be in for perhaps 30 to 60 mins to "top off" the internal phone battery to get me through an demanding day.
I've had several different types of these, and New Trent seem to have the best quality, longest lasting ones I've found. I'm currently using the New Trent iCurve IMP70D 7000mAh. It's quite thin and easy to carry around. I can typically get 3-4 charges out of it. I love the dual charging ports, and the 2.1A port is nice to have for my tablet. It also charges with a standard micro USB cable, so that makes one less thing to carry around. In my opinion, it's the best combination of power, portability, and flexibility that they offer. I used it frequently when dealing with power outages and all day bus rides while living in Albania. Having it kept me sane on several occasions.
Ziocomposite said:
It looks pretty good. Does it feel sturdy? I'm also in the same boat especially with summer on the way. Plenty of trips coming =]
Click to expand...
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It fits into my jeans pocket perfectly, but I can put my Gnex and YooBao in the same pocket..
I got it for USD 64 from http://aysia.com.my/aysia-online-shopping-mall-1/it-products-electronics/yoobao/yoobao-power-bank-yb-642/yoobao-power-bank-yb642-1.html
Comparison in size between my old MiLi Power Crystal
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External Battery Review: Lepow Moonstone

Lepow Moonstone Review
When I was approached by Lepow to write a review of their backup battery products, I have to confess that while I was flattered by the request because, as I was told, my 'reviews' tended to be fair and unbiased, it got me to thinking about how often I've really needed a reserve power source. My lifestyle tends to revolve around either a home office where I have abundant recharging resources, or travelling in my car where I likewise have chargers. Thus, I've never purchased one for myself thinking it was a low-priority item relative to a case or screen protector. Or so I thought.
Then it happened.
I found myself away from home, in the woods using Backcountry Navigator evaluating a 950 acre property without access to AC current for a USB charger and a phone that was gasping for air. There's an old saying popularized in a certain community which contends: "better to have it and not need it, than to need it and not have it." Thus I learned the hard way that having a reservoir of available juice to recharge the electronics we rely on so much nowadays is probably a good strategy.
This review will start with the Lepow 'Moonstone' 6000mah unit, but in fairness to other vendors who might wish to have their units evaluated, I will update the thread periodically to reflect my thoughts and viewpoints as they evolve.
First Impressions:
The representative from Lepow made a very clear point about mentioning their packaging, and I have to agree there has been a fair amount of thought they've put into the presentation and construction. I'm told that the carton and other materials are enviro-friendly, even down to what is commonly called Tyvek that wraps the unit. A quick snip releases the band which seems to anticipate a product merchandised on hang pegs at retail. In my case, I received the unit in a cardboard box which is likewise recyclable. If there's anything I really can't stand, it's the sealed heavy plastic blister packs that require a hacksaw to open. I'm getting too old and too cranky to have to fight with the item I just bought, so this was a welcome change.
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Included with the packaging is a very nice heavy felt case with elastic band in which you can slide the unit, the USB cable and even a couple other (flat) things if needed which will keep the Moonstone in good condition as it bounces around along with the other things you have in the console of your car, pocketbook or briefcase.
While the shape is very pleasant from a design standpoint, my intuition and experience tell me that this unit would have greater appeal with women than men. Shapes that mimic the phone (flat and rectangular) will likely have more popularity with the fellas as it would be easier to slip such a thing into a jacket pocket, where the softer rounded shape of the Moonstone with its felt case can reside very comfortably in a handbag, resembling as it does a lady's compact or other cosmetic item that are regularly rattling around in the dark recesses of a pocketbook where wise men fear to tread. I'm told that Lepow has other designs in the works which are not as yet to market, so it would be great to evaluate those also when the time comes, but for now we'll go with what we've got.
The construction quality seems first-rate. It has a nice solid feel, and along with the other quality components, the battery itself is Lithium Polymer which is not only more reliable for longer term storage, but also less hazardous. Overall, it makes a very favorable impression.
For those of you who happen to order from Amazon, the Moonstone ships with some very cute accessories which can be used to enhance its personality included in a heavy vinyl(?) case tucked away underneath the bottom cardboard shelf. While I tend to be more 'down to business' in my needs, I confess some of the dots (especially the skull/crossbones one) had some appeal which seem to go well with the fishbones. And, for the record, I'm still trying to figure out what bullet-proof material that case is made from.
Charging & Performance
One of the hallmarks Lepow claims for their product is the ability to know what the charge state is by pressing the button which activates a series of four LEDs corresponding to the reservoir state, and not overpowering the target device. Lepow's unit has three ports, one micro USB for charging the unit itself, two regular USB ports corresponding to 'fast charge' a second 'slow charge'. The company claims that their 'intelligent' electronics will adapt to the phone and deliver only as much current as the unit can handle, a reassuring feature when working with equipment of unknown capabilities.
The unit I received seemed to be fully charged (as you can see in the video below) so I proceeded with this test below:
HTC One
Drained to 10% charge level
Phone left on/running during charge
Moonstone 'fast charge' port selected
In this first test, the phone took some five hours to charge which isn't exactly surprising given the phone is consuming power as it's being charged. I was connected to my home WiFi router and I even had a couple calls come in so I guess the amount of time to charge is to be expected under these conditions. However the charging stopped at 94% which was somewhat surprising. Out of fairness, perhaps using an external power source for charging a phone while its in use causes the unit to turn off, fearing it's delivering too much juice for the target device, which if correct, is comforting and unexpected proof that the company's claim for 'intelligent' charging that won't overpower the device has been confirmed.
The second test was more accurate conducted as it was under more controlled conditions.
Recharge Moonstone:
5 hours from 1 blinking light to 4 LEDs
4th light didn't stop blinking until the next morning, so it's hard to say how long to a full charge just at the moment.
Let unit sit for about 20 minutes
Charge of HTC One: 2 Hours with the phone powered off using fast charge, 100% level on phone achieved. Four lights still remaining on Moonstone to indicate charge status of 100% until the unit powered down and I reconfirmed the charge state which revealed only 1 LED.
On the whole, the Lepow Moonstone is both easy and fun to use, attractive, and certainly an option worth considering for any of you who are thinking about a backup power supply... and also for those of you who like me - aren't.
Any price on this? This is something my girlfriend wants!!
The last time I checked, they had a fire sale for $20 on Amazon.
By a number of reviews that showed up on XDA, I do see Lepow guys doing a good marketing work Though originally I did turn down the review, I think this is a good external battery and a value for $20. One thing I'm surprised, unless I missed it, nobody really tested to calculate the actual capacity of this battery. Due to efficiency loss (through 5V usb port while the internal battery is at 3.7V), you typically loose about 25-30%, so the actual capacity will be somewhere between 4000-4500 mAh. Would be cool for testers to determine it, using your phone/tablet battery capacity as a reference.

Vote: 8000mah Nexus 5 extended Battery. Will you buy?

I love travel, especially remote area. I want a great phone with long lasting battery. Nexus 5 is a great phone, but battery only last less one day under moderate use.
So I made a extended battery, the capacity is about 8000mah, 3.6 times of the stock battery:
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I am waiting for the 3D printed back cover to finish this project. According to my test, under normal use, this phone can last 3-5 days with one full charge. The charge time is about 5-6 hours. My wife love it too, I am making another one for her. She asked me why don't mass produce it and sell?
The only thing about this extended battery is the complexity. Like other recent cell phones, Neuxs 5 put NFC, wireless charging coil, antennas and vibrator on the back cover. So to make this extended battery work on Nexus 5, beside the 8000mah battery. I also designed NFC Coil, Wireless Charging Coil, WiFi Antenna, GPS Antenna, and a vibrator. All these components adds up the cost. The retail price may reach $70-80.
I started this battery as a hobby. Is here anybody like my design, and think I should mass produce it? Will you upgrade your Nexus5's battery to 3.6 times for $70-80?
Yes!!!
At that price? Yes, really just depends on the bulk added
-guess
Looking good! 8000mAH is a lot of juice. How much bulk (in term of thickness and weight) is this going to add?
This is a great idea, but way too big. If you made one with a 2000mah battery I'd be all over it. Good luck!
I would take one for that price.
Sent from my Nexus 5 using XDA Premium 4 mobile app
God damn!! I wouldn't mind using it, ingress destroys my battery.
Sheesh that's a lotta juice!
Looking forward to seeing that cover and how the phone looks after juicing
How about adding a MicroSD slot, I'd imagine you could graft it onto the usb port somehow... I never understood why nobody does that.
kokoon said:
How about adding a MicroSD slot, I'd imagine you could graft it onto the usb port somehow... I never understood why nobody does that.
Click to expand...
Click to collapse
Technically, MicroSD slot is doable with the usb port, but we may need to cut off the data wires of the usb port. I haven't tried that yet. Don't know if the SD card and USB data can be connected at the same time to the PC / Mac.
==========================================
Thanks Everybody for the supports. I am glad to see you guys are interested.
I worry most about this mod is the installation part, since Nexus 5 is not deisgned with a removable battery. Please let me know if the following installation is suitable for most of users:
1. We need to take your nexus 5 apart to take the original battery out.
2. Install the small battery of the extended battery and plug in the connectors.
3. Install the circuit board which connects the vibrator, antennas and coils.
4. Flip the large battery back to cover the small battery.
5. Connect the coils on the large battery to the circuit board.
6. Snap the extended battery cover on. (Coming Soon).
Please let me know how do you guys think about the installation part.
=============================================================
About the thickness: according to the 3D file, the thickness is about 17.5mm. I think it's okay.
The last phone with extended battery I used is HTC Sensation XE, with the extended battery is 18.5mm for only 3800mah
The thickness of galaxy s5 is even thicker: 21.4mm for 7500mah (With this thickness, we can make about 10000mah for nexus 5).
The thickness of s4 is 17mm for 6400mah
OMG like really this would be awesome could you post some pictures of your phone with the inserted?
And ps be sure to ship outside the US too
The worst of Nexus 5 is the battery...
This "mod" its awesome! I cant wait to see the Nexus 5 ensambled with the 8000mAh battery!!
Sent from my Nexus 5 Unchained using XDA Free mobile app
I'll Buy
this is awesome. Though i would prefer something along the lines of a 3000mah battery, just so its that much thinner
This looks pretty cool. Can't wait to see how it turns out.
Just perfect
This would be soooooo good. The installation doesnt look hard and you are getting 8000 mAh. Ridiculously good.
Waiting to see that final image with the printed back cover.
I will buy it
This is very good work you've done. But it is a very niche product. Not many people are willing and able to disassemble their phone. Fewer of them own a Nexus 5. Fewer of those want a bigger battery and will ever learn about your product. And fewer still will swallow the price.
I encourage you to charge as much money as you need to, so you can make up for the low sales volume. Don't short-change yourself. This looks like a $100+ kit to me. Maybe you can hold a group buy, massdrop-style, where the price falls as more people commit to buy.
I'd definitely pay for it, well worth the money! but would want a bulky case to fit it lol.
Easily $100 or more wouldnt pay more than $150!
Like he said it's something only certain people would buy and be able to fit it properly, well I would!
I would love to have that battery power but i'm afraid that thing will ruin camera performance.
An extension battery pack can't add any thickness where the camera sits, otherwise it will impact on camera
If it's not bulky, I don't mind paying up to $100-$150. It would be nice if you can make the size smaller and fit it inside.

[REVIEW] Lumsing 6000mAh powerbank (PBJ-6200)

Hi all
Continuing on my new found hobby of tech reviewing I wanted to share with you my thoughts on a new Lumsing product ive got my hands on.
Unboxing
The powerbank comes in a fairly well packed in a cardboard box with a little handle and minimal product information on the front of the box.
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On the back there is a good list of features:
Size 4.88 x 2.64 x 0.51 inches
capacity 6000mAh
Weight 6.49oz
Input Mirco USB 5V / 1.5A
Output 5V / AA & USB 5V / 2.1A
Service life 500 charge cycles
compatible with all 5volt input required devices.
Security protection design
protection for overcharge
protection for overvoltage
protection for overcurrent
protection for short-circuit
And one of the other product features I thought important to point out:
Made with grade A cells and premium microchips.
The fact that this device lists 4 different protection methods is really important to me. I know it basically just a battery but its a lithium product which im planning on plugging my expensive devices into and I dont plan on having it explode or overvolt and break my phone or tablet. Having all 4 listed puts my mind at rest somewhat. I also like the fact that they have pointed out that they are using premium productions and a first for any battery pack I’ve reviewed - they call out the service life! Finally a company that will state how long these things should last. 500 cycles feels like a good bit of usage, I dont tend to use these things a lot and seeing as it can recharge my phone 3 to 4 times I could actually get 2000 phone recharges out of it before it starts to give up. I do a fair amount of travelling and I think it will be a number of years before I use up this product service life.
Hands on
Anyway enough about the box and the outer packaging, lets open it up already and take a look inside. I have to say the box felt a little cheap, being printed basically on brown card so I wasnt holding out high hopes when I opened it up for the quality of the product. How wrong I was!! Inside the battery is really well packed in a solid foam insert and in a little bag. Included under the powerbank is a nice little coiled USB lead. Again not something I’ve seen from the other powerbanks I’ve reviewed, this to me, although a simple little thing makes all the difference, seeing the little coiled lead was a moment of “oh thats good” in my head. I tend to use these powerbanks on the go, usually on holiday or when im out and about on a long day out (shopping with the girlfriend!), so i tend to have the powerbank in my pocket and as my phone starts getting lo I just plug it in to my powerbank and have the whole thing charging in my pocket while im walking around. Some of the companies seem to think you need a 2m lead with these things! So this for me is a big plus! It is worth noting that no Apple leads are included but these can be purchased separately.
One thing that did let me down with the lead is that it is charge only, there are no pins for syncing so straight away meaning that if you are traveling you need this lead for the powerbank and another lead for syncing with a PC. Feels a little mean…
Ok continuing to unbox, there is also included a lovely feeling little bag for the powerbank with drawstrings and a Lumsing logo. This also impressed me as I havent had any others which included a bag to keep it in. Also included is a simple instruction manual with how to use the product.
The powerbank itself is covered in brushed aluminum and is pretty solid feeling and it looks lovely (it was a pain to take a picture of because its so shiny!!) On the top there is a USB input port for charging and 2 USB output ports labelled 2.1A and 1A. Having a parent who needs reading glasses for everything a potential improvement would be to colour code the ports to prevent you plugging a 1A device into the 2.1A port by mistake and damaging it.
Also looking at the device from top (or bottom) profile shows an apparent bulge in the middle of the device. Im assuming this is just the battery cells but having had a galaxy S4 with bulging battery problems this made me worry slightly about what was going on under the skin! It charged and discharged fine so I wont dwell on this.
The top, side and bottom are a black plastic with a blue trim. Another nice little touch to add to the premium feel of this product was the fact that all the black plastic parts of the device are covered with that peel-away protection which always feels nice to peel and and makes it feel like they really care that this is in beautiful condition when it reaches you.
On the side is a single bottom (left hand side) along with 4 blue lights each of which indicates 25% of the battery capacity. towards the bottom is a dotted design which looks kinda cool. The right hand side is all aluminum (single sheet used to cover front, back and 1 side.
Overall it charged my Galaxy S4 fine. The 2.1A rating slightly confused me as my phone is 2.0A input and most of my other devices are 1.0A. I plugged it in and nothing blew up so I assume 0.1A isnt anything to worry about.
Positive points
+Really really premium feel
+Felt bag
+Coiled charging cable included (USB)
+Premium aluminum body
+stylish looks
+Premium lithium cells and circuitry used
+Well packaged and protected
+Two different charge outputs
Negative points
-Charge only lead included, so cant be used for phone sync
-Slight bulge in unit, not sure if it was just mine or if this is normal
-The aluminum body seems to scratch fairly easily
-Input for charging is only 1.5A so no fastcharge from 2A phone chargers
Conclusions
Feels like the manufacturer really cares about their product and the end user experience. There were a few very minor annoyances but these are easily overcome with the premium feel to the device. Lumsing is my new top choice for power accessories.
Score
My Score out of 5:
:good::good::good::good::good:
5 out of 5 - really premium quality and premium feel to this device.
Bottom Line
Top quality premium device with almost every detail well thought out.
Links
Amazon UK
http://www.amazon.co.uk/gp/product/B00KV80WYA
Also available in black and orange
http://www.amazon.co.uk/Lumsing-6000mah-Portable-External-Battery/dp/B00KT26W0G
Manufacturer Website
http://www.lumsing.com/product/ultra-slim-lumsing-6000mah-portable-power-bank/

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