Related
I have an on-going project of creating a battery extender for my xda and I want to share it.
This is composed of 8 rechargable NiCAD or NiMh battery connected in series to produce a 9.6 v. The 9.6 v will be regulated by a 5v regulator (LM7805) then it will be connected in the XDA power dongle.
With this project, the battery life can be x4 or more depending on the batteries used.
I'm currently (no pun intended) trialling a Mugen 4500mAh battery which looks likely to give me >16 hours continual use ob my XdaII. Probably much more expensive than your solution but perhaps more convenient being 'built-in'.
Good idea though, I could have done with your solution two years ago!
Update on my project
I already assemble it and have try it already and here is the update.
The good news is the battery is charging.
The fall back is that the regulator that I have used is emitting too much heat.
I also have done some bench test and here are the data for those who are interested.
1. XDA IIs is drainning about .700 Amperes when charging supplied by 5v
2. XDA IIs will not charge with 4.8 V or below
-I got this data using a adjustable power supply with an Ampere meter
Project Fall down
For the fall down, I think it is because of two reason:
1. It is because the total Voltage supplied by the batteries is 9.6V and the out put regulation is 5V, therefore the 4.6V is being converted to heat.
- I should have use 6 battery insted of 8 to 7.2v instead of 9.6.
2. Since 5v is the out put of the regulator and it is charging the battery with a 4.8v (for i.e.) this will mean that the .2v drop will be in the line between the charger and battry which also mean the current is the max output of the regulator (Applying OHMs Law I=V/R, and R being 0 will result to infinity in theory and maximum in reality)
____________
| |
V1=5V V2=4.8V
|___________|
-I think I should have put a resistor to control the current or I should have designed a regulated current supply instead of a regulated voltage supply
For the #2 reason i'm not still sure about this because, this can only be true if the XDAIIs or it's battery does not have a built in charging circuit.
I have read some articles on mugen battery that it has a overload protection circuit my guess is that XDA also have it my I dont have any information yet. Incase XDAIIS or the battery alreadhave a charging circuit I only need to resolve my #1 Fall down.
I think I need to do more research, but if anybody could provide me information it will be highly appreciated. XDAIIs service manual maybe a greate help.
resolved
My project is now working, the over heating was resolved by putting a heat sink on the IC regulator and reducing the numbers of AA battery to 6 pcs (6 x 1.2 =7.2).
I'm still not sure where the over charging protection circuit is installed (XDA unit, battery or in the power supply/Craddle) incase it is not with the xda or the battery then I need to be carefull not to overcharge my battery with my project but if it is in it then my project is now perfect.
Any body knows where the over charging protection circuit is please help.
Re: resolved
there is a russian link for the same project - http://forum.pocketz.ru/index.php?showtopic=11339&hl=battery extender&st=100
Adapter:
http://wince.box.ru/russian/caradapter.htm
typically you can take any car adapter, give 12v to its input and take 5v from output for charging your PocketPC battery. Most car adapters would give 5V output if input is between 8...12V
hi kabayan,
i think the over current protection is in the device.
i converted an external battery charger (using 4x AA battery) intended for blue angel to my himalaya. there's nothing inside it except for a 10K resistor in series with the output.
i also noticed that even with the correct regulated voltage applied, my hima won't charge without a current limiting resistor, so its definitely an over current protection in the device!
congrats in your project!
Schematic Diagram
Anybody has a schematic diagram of XDA? Please share
If you have the money might as well buy additional battery so no need for you to go thru all thoses stuffs. My project had work for me actually it is easy just basic ohms law. The challenge I have encountered in the project was the heating up of the regulator but it was resolved. by the way the reason I made a battery extender is because that time extra battery is not easy to find and I dont have a budget for it so I just salvage some electronic parts from my previous projects. But now I already bought an extra battery- a lot convience than before
Hello,
I'm thinking of buying a mini-usb AA (1, 2 or 4, to be decided) travel charger for an Orbit 2.
There's plenty of cheap stuff on Ebay or Amazon (and elsewhere), but If anyone has used them, I'd like to know
A) do you think the output is regulated enough to be suitable for safely charging my Orbit.
B) How much power is lost? For example a 1.2V 2500 mAH AA battery, should (if the rating is correct) should have nearly 2.7 WHour capacity (1.2*2.5), so that should roughly half fill an 1350mAH (3.7x1.35 = 4.8 WHour) Orbit 2, even allowing for some power loss.
Does this match your experience.
Perhaps it's easier just to carry a spare orbit battery, but AA's are so useful, and you can find them anywhere.
Ive been tempted by these, but never heard good enough reviews to buy one so am interested to know how you get on.
I've been looking at a Li-ion pack on evilbay - 2600mAh in a unit the same shape as a PPC phone but just a little smaller. Seems like it will fit on the back of my m700 with some velcro (or rubber band!) - so allowing extended GPS use outdoors.
My questions are similar - are external packs worth it, and do they keep the phone charged and do they fully charge a dead phone?
BTW, I'm also looking at a solar charger currently on offer at maplins . Its £9.99 (£20 off ?) and will hold and charge 5 AAA batteries. Solar chargers like this generally get crap reviews, but the seemingly good thing about this one is its rated at 1w, which is more than similar ones which I've seen
r_southampton said:
Hello,
I'm thinking of buying a mini-usb AA (1, 2 or 4, to be decided) travel charger for an Orbit 2.
There's plenty of cheap stuff on Ebay or Amazon (and elsewhere), but If anyone has used them, I'd like to know
A) do you think the output is regulated enough to be suitable for safely charging my Orbit.
B) How much power is lost? For example a 1.2V 2500 mAH AA battery, should (if the rating is correct) should have nearly 2.7 WHour capacity (1.2*2.5), so that should roughly half fill an 1350mAH (3.7x1.35 = 4.8 WHour) Orbit 2, even allowing for some power loss.
Does this match your experience.
Perhaps it's easier just to carry a spare orbit battery, but AA's are so useful, and you can find them anywhere.
Click to expand...
Click to collapse
I have several of the 4 AA usb type for my PPC and WM devices. I haven't had any issues with it damaging the device, but I'm careful as to what the power rating is on the device. I don't going over by 1watt but anything else I don't risk it. My devices require 5watt to charge, so the extra watt doesn't hurt anything. It's been a life saver on long trips and when in a pinch to need to charge.
Hi guys,
I do a lot of hiking and walking, taking my trusty Touch Cruise/ Orbit2 with me, running GPS and phone. I use the GPS to run EveryTrail - which allows you to track and record your position to upload your route and pics to the site later.
Of course, with all this lot running all day... well, lets just say the batteries dont!
Come to use the phone at your desitination, and voila! you've got a dead battery....
I'm not interested in those "2300 mah" extended batteries, I want something that's going to last DAYS (under these conditions) and I dont mind if I have to have it on a belt or something.
My idea is this:
Build a case to hold whatever and however many rechargeable batteries to give maximum power - within reason (say 48 hours).
This would then go on a belt, with a fixed power cable going to the mini-usb charge port on the Touch Cruise.
In theory, it might be good if it was possible to "daisy chain" multiples of these battery packs to increase the capacity still further....
So, my questions would be:
1. What are the pin connections for power on the mini-usb interface for the Touch Cruise?
2. Can someone recommend a low-unit supplier? (i.e 5 mini usb connectors)
2. What type / spec batteries would I need?
3. What does anyone else think of the idea?
My dad's helping me to look at this - who knows a lot more about electronics than me!
Thanks in advance - I think this would be useful for other people with the same goals...
i think that it is a good idea except one thing i would be worried that i would break the mini usb connector on the bottom of the phone.
OK, this is a good idea, but the weak link is the mini USB connecter (guess how I know...) I think the best solution would be a sleeve that clips around the phone so that the mechanical stress is not borne by the USB connector.
You can get the mini USB connector from Maplin:
http://www.maplin.co.uk/Module.aspx?ModuleNo=43998
Batteries should probably be NiMH as they have good capacity. Charging is going to be an issue, as you don't really want to have to charge 10 separate AA batteries...
Good idea though, I can only get about half a day out of my Kaiser under those conditions.
Hey, was thinking exactly about the same ;-)
My idea was to use:
1. A 5VDC switching regulator, so battery voltage doesen't matter and for example a 10V battery pack with 2000mAh will last as long as a 5V 4000mAh-battery
2. A complete Li-Ion battery pack with charger from an old camcorder,notebook,accu-driller, or whatever...
Good luck!
Hi there ,
I suggest you to buy 2 external battery pack of maybe 4000 to 5000 mah type suitable for your pda or your device , size like a normal cigarette pack , connection via mini usb cable or similiar , put these into your pouch and use it for your outdoor activities , it is easier than diy making all sorts of modification on wiring and so on . You can get these ext. battery pack with the right voltage and amps or omnhs - whatever from ebay and your local handphones and computer malls or outlets in most major towns in any country . Making a belt or an armband or a shoulder band or any sorts of diy is innovative but will take a lot of time , unless you are the type that likes to be really different or unique from others , then dont give up in making your special dream battery pack , cheers and best regards - jimmunsw
I have a setup like what you want, A 12v 12Amp SLA Battery with a 12v accessory plug that clips on that I just put my car charger in. To ad to this for my larger devices I have a 12v 46amp array in my car for my lappy, both supplemented by Solar panels.
Works well but there is a lot of weight.
Portable Power Supply
I've been interested in a similar setup for extended battery life. I've been increasingly interested in using Li-Po 18650 cells from dead laptop batteries. http://hackaday.com/2011/09/19/things-to-do-with-your-laptop-batteries-when-theyre-dead/ achieving 12v and using a cigarette car adapter to step the power back down to a constant 5.5v 2a It would be cool to finally test this out. dead battery packs from laptops are found many places so the parts could be fairly cheap.
Keep us posted on your DIY!
Hi,
I'm thinking about getting a bike-charger for my Androidphone and was wondering how much current would be necessary for an average device to charge or at least not drain?
The charging-device I'm currently looking at gives out about 300mA.
The reason why I don't state which Androidphone I'm using is that I want to future-proof my bikecharging, I don't want to get a new charger when I get a new device. Of course I'm not talking about a tablet.
Could someone edit the title of the thread to "[Q]How much ampere does a Androidphone need for charging?"
most android phones (at least most smartphones today) require 5volts at anything from 500mA to 1A for charging. Even if you supply them with 300mA they will charge if they are in standby but may actually drain under heavy use. You only have to respect the voltage rating - 5Volts. And i recommend at least 500mA, just to be sure.
If you need to build it from scratch.. you may need a dynamo attached to the bike's wheel. A bike dynamo will give you variable voltage/current. You need to regulate the flow of electricity from the dynamo to the phone, otherwise you risk killing the phone due to temporary spikes in voltage from the dynamo. An easy fix would be to use a LM7805 voltage regulator (available at electronics store, radioshack etc). It costs a couple of cents, and it will output a steady 5Volts if you supply it with anything ranging from 6 to about 28 volts.
Also check if the dynamo is supplying continuous or alternative current. If it's alternative, you need to use a rectifier bridge (also available at radioschack) to rectify the alternative current to a continuous one. A small 5 amp bridge should be enough. So.. your setup should look like - bike dynamo ->rectifier bridge ->lm7805 voltage regulator -> phone usb connector.
Have fun
Thanks for the info! I think I'll then have to go with a device that gives more ampere than just 300 mA - mobile data, gps navigation & music playback is what I'd classify as "heavy use", and that's what this whole setup is for
Also thanks for the update about all the extra equipment - I'll probably just go with all-in-one package, I know nothing about electronics
facdemol said:
most android phones (at least most smartphones today) require 5volts at anything from 500mA to 1A for charging. Even if you supply them with 300mA they will charge if they are in standby but may actually drain under heavy use. You only have to respect the voltage rating - 5Volts. And i recommend at least 500mA, just to be sure.
If you need to build it from scratch.. you may need a dynamo attached to the bike's wheel. A bike dynamo will give you variable voltage/current. You need to regulate the flow of electricity from the dynamo to the phone, otherwise you risk killing the phone due to temporary spikes in voltage from the dynamo. An easy fix would be to use a LM7805 voltage regulator (available at electronics store, radioshack etc). It costs a couple of cents, and it will output a steady 5Volts if you supply it with anything ranging from 6 to about 28 volts.
Also check if the dynamo is supplying continuous or alternative current. If it's alternative, you need to use a rectifier bridge (also available at radioschack) to rectify the alternative current to a continuous one. A small 5 amp bridge should be enough. So.. your setup should look like - bike dynamo ->rectifier bridge ->lm7805 voltage regulator -> phone usb connector.
Have fun
Click to expand...
Click to collapse
Now that is a helpful and informative post! If only more members were this decent
Whatever operating system it uses, it will roughly use the same amount of power.
What I did for my winmo Toshiba is to get 12......yes TWELVE rechargeable AA batteries, two 6 AA Battery holders, a plastic hobby box to house everything in, a samsung car charger (12v - 1amp max). I connected all the AA batteries in series. Then using the innards of the car charger, connected it to the battery terminals. The car charger works from 8v - 24v. When the rechargeable batteries are about to die, they go to 1v, so the car charger can still get the most from the batteries. I made a holder in my bike and this has been powering my phone It's awesome really as under testing with my old O2 XDA Orbit, the battery lasted for atleast 18 hours..... with a gps application running, screen brightness on full, music playing full whack, bluetooth on and wifi on!!
On my bike, the battery pack lasts enough for a week of cycling which is plenty enough for me!! Better than a dynamo ;-)
How much ampere does a Androidphone need for charging?
I agree with facdemol except for one part of his reply. I believe he meant DC (direct current) and AC (alternating current). If it is AC then he is correct about the rectifier bridge being required to change AC to DC which a is a power source his phone can actuallly use.
So I'm in my junior year of electrical engineering and seeing the incredible things done with smartphones is something I really would like to be a part of one day. I wanted to discuss, considering the limits of current technology, if it would be possible to create a safe Dash Charging power bank for this device? For those who don't know how dash charging works I'll post a few links and my understanding of how it works and if I'm wrong at any point feel free to correct me.
Dash Charging - The Technology
The way dash charging works, as I understand it, is that the USB-C cable wires are made wider in diameter to accommodate a larger amount of current being passed through to the battery. The charger plugged into the wall takes on the burden of the extra voltage pushing the current through the wire and keeping it away from the phone's internal battery (which is brilliant). That means that the charger takes on the extra heat which isn't a problem because passive components are often more tolerant of heat than batteries are.
Links:
http://www.phonearena.com/news/How-it-works-Dash-Charge-fast-charging-on-the-OnePlus-3_id82646
http://www.trustedreviews.com/opinions/what-is-dash-charge-oneplus-3
The Issues
A dash power bank could be charged up exactly like the phone; with the dash charger it could fill extremely fast. However, using the battery pack to charge the phone means that the internal Li-Ion batteries of that charger will be taking on the extra heat from within the case which could:
a) shorten the power bank's life span
b) Possibly lead to unsafe power banks if it got too hot
I also see there being limitations with the power bank's ability to maintain a full speed charge similar to wall charging along with what types of batteries would be needed to provide the power output similar to the dash charger.
The Solutions
So in my limited knowledge I think that the biggest enemy here is heat generated in the power bank. I feel like the rest could be overcome with a fairly large bank of 18650 batteries. It is possible to have a passive cooling system built into the power bank for heat dissipation but that might make the battery bank difficult for users to hold on their Pokemon Go outings. Also, reducing Dash Charging specifications just a little, decreasing the speed at which it could charge the device, would alleviate some of the concern. So while you might not get 60% in 30 minutes from the wall, perhaps aiming for 45-50% charge in that amount of time would increase the power bank lifespan and total amount of charges.
What do you all think? I'll readily admit I don't understand completely how current battery bank internals work to limit over-current and over-voltage scenarios as I've never taken one apart. If anyone wants to educate me and say whether they think Dash Charging is possible I'd love to hear about it. This is the kind of stuff I imagine the OnePlus engineers are sitting around working on every week.
i think that would be too expensive to make for consumers, u figure if a dash charge block is almost $30.00 this thing would be well over $500.00 which would be too much for a regular consumer to purchase just to have a portable charger, maybe in about the 3rd or 4th generation of this technology we could see one in about 5 years, they would rather make a ton of 30.00 purchases and have you buy their charge block opposed to very little purchases of about 500.00 for power bank
It's actually already there in the market,
named "OPPO VOOC Powerbank"
attached is mine, working fine with OP3 Dash,
Price is around $45-50 - 6000mAH
Charging rate is 3,5A
and it DOES charge my device up to 60-70% in 30 Minutes
it heat up though, especially near the plug (USB C end)
this is why i use the metal based USB C adapter, so it release the heat faster
otonieru said:
It's actually already there in the market,
named "OPPO VOOC Powerbank"
attached is mine, working fine with OP3 Dash,
Price is around $45-50 - 6000mAH
Charging rate is 3,5A
and it DOES charge my device up to 60-70% in 30 Minutes
it heat up though, especially near the plug (USB C end)
this is why i use the metal based USB C adapter, so it release the heat faster
Click to expand...
Click to collapse
I had no idea that even existed. I'm going to look into the specs of that device and see what it has under the hood. Thanks for letting me know about it!
AlkaliV2 said:
I had no idea that even existed. I'm going to look into the specs of that device and see what it has under the hood. Thanks for letting me know about it!
Click to expand...
Click to collapse
Here,
the information page from the maker itself :
http://www.oppo.com/en/accessory-vooc-power-bank
and where to get it :
https://www.amazon.co.uk/OPPO-VOOC-Flash-Charge-Power-White/dp/B00SINEEXA
I'm going to build power bank using Dash Charge car charger. The power banks higher voltage (12V if using car charger) means less current for individual cell while charging. I have bought battery holder case 10 x 1,5V for AA batteries. http://r.ebay.com/vpShFJ (I already have plenty of Eneloop AA batteries for other accessories.) Each Eneloop has at least 1,5Ah (1500mAh) capacity while retaining voltage at or over 1,2V. http://lygte-info.dk/review/batteries2012/CommonAAcomparator.php I'm going to attach 12V socket to the battery holder case so I can use my car charger both in car as well while at camping.
Battery bank consisting of 10 x AA Eneloop has a total capacity of: 12V*1,5Ah=18Wh.
Dash chargers input is rated at 12V/2.5A so each individual Eneloop would have about 250mAh discharge rate.
My old Galaxy Note 3 had 3,8V 3200mAh battery and the capasity was ~12,2Wh. I don't know the nominal voltage of OP's battery but I would estimate it's about the same as Samsung's so the capacity should be lower than in Note 3. Maybe around: 3,8V*3000mAh=11,4Wh.
10x Eneloop batteries has a capacity to give energy for charging OP3 from 0% TO 100% at least. (18Wh/11,4Wh = ~1,6)
I think in India it's not available
Sent From My One Plus 3
https://forums.oneplus.net/threads/new-product-survey-dash-charge-power-bank.457920/
Squabl said:
I'm going to build power bank using Dash Charge car charger. The power banks higher voltage (12V if using car charger) means less current for individual cell while charging. I have bought battery holder case 10 x 1,5V for AA batteries. http://r.ebay.com/vpShFJ (I already have plenty of Eneloop AA batteries for other accessories.) Each Eneloop has at least 1,5Ah (1500mAh) capacity while retaining voltage at or over 1,2V. http://lygte-info.dk/review/batteries2012/CommonAAcomparator.php I'm going to attach 12V socket to the battery holder case so I can use my car charger both in car as well while at camping.
Battery bank consisting of 10 x AA Eneloop has a total capacity of: 12V*1,5Ah=18Wh.
Dash chargers input is rated at 12V/2.5A so each individual Eneloop would have about 250mAh discharge rate.
My old Galaxy Note 3 had 3,8V 3200mAh battery and the capasity was ~12,2Wh. I don't know the nominal voltage of OP's battery but I would estimate it's about the same as Samsung's so the capacity should be lower than in Note 3. Maybe around: 3,8V*3000mAh=11,4Wh.
10x Eneloop batteries has a capacity to give energy for charging OP3 from 0% TO 100% at least. (18Wh/11,4Wh = ~1,6)
Click to expand...
Click to collapse
We're going to need a hardware XDA for people like you. I never would have thought to string together Eneloops to make an external charger since most of your power banks contain 18650 with overcharge protection and stuff built in. The wall dash charger is spec'ed to run 5V at 4A and the car charger loses half an amp to land in at 3.5A max. Car charger voltage varies between 3.4~5V from what I can tell probably based on the car's cigarette lighter specs.
What kind of case are you using with the eneloops and what are you using for overcurrent/voltage protection?
otonieru said:
It's actually already there in the market,
named "OPPO VOOC Powerbank"
attached is mine, working fine with OP3 Dash,
Price is around $45-50 - 6000mAH
Charging rate is 3,5A
and it DOES charge my device up to 60-70% in 30 Minutes
it heat up though, especially near the plug (USB C end)
this is why i use the metal based USB C adapter, so it release the heat faster
Click to expand...
Click to collapse
So... can you tell me if a normal VOOC charger block charge the OP3 as fast as the original dash charger in package?
I saw it is the same current rate, but the technology, is it interchangeable?
Just wait oneplus is planning to release a dash charge powerbank with 10000mAh so stay connected no need to buy oppo 6kmAh one
AlkaliV2 said:
The wall dash charger is spec'ed to run 5V at 4A and the car charger loses half an amp to land in at 3.5A max. Car charger voltage varies between 3.4~5V from what I can tell probably based on the car's cigarette lighter specs.
Click to expand...
Click to collapse
You are right, the car charger uses lower current and is probably a bit slower. When I receive my car charger I will do some testing and will report back.
The voltage variation is needed on all chargers. When the battery is almost full the charging voltage drops.
AlkaliV2 said:
What kind of case are you using with the eneloops and what are you using for overcurrent/voltage protection?
Click to expand...
Click to collapse
I have ordered a case like this: http://r.ebay.com/vpShFJ
The car charger has been designed to be used as it is. The charger itself does not require additional overcurrent protection but in case of a short circuit a 5A fuse is needed to protect the wiring and Eneloops. Overvoltage is not a problem as the maximum voltage with Eneloops is going to be under 15V.
DouglasDuZZ said:
So... can you tell me if a normal VOOC charger block charge the OP3 as fast as the original dash charger in package?
I saw it is the same current rate, but the technology, is it interchangeable?
Click to expand...
Click to collapse
Yes it is. I've posted it in another thread as eell. Just check through my post history.
This is pure logical, since Oneplus is just a subsidiary company of OPPO, so they surely can share few technologies between each other, and VOOC/DASH is one of it,
Just make sure your usb c adapter quality is good when you decide to use it with VOOC charger.