Develop Bugs

Car chargers 1000ma?

I'm currently using a regular usb cable to charge my phone directly from my car stereo while driving. The problem is that it takes close to an hour for the battery charge to increase 10% when I'm streaming pandora through bluetooth and using the phone's GPS. I'm assuming that the usb port in my stereo is only capable of putting out 500ma, if not less. Curious to see if anyone knows whether a DC to micro usb cable would give me a faster charge (1000ma). Thanks in advance.

BEst one ive ever used is the official palm one for the pre or pixi. Completely charges the evo from dead to full in about an hour while on the road on a call via bluetooth. Seriously good, verified a while ago on the precentral.net forums that its 1000 mA. They are only like 15 bucks at best buy, or maybe even less on amazon.

Go to amazon or google and search for 12V 1Amp USB charger and that should give you exactly what you need...I use a 1Amp charger for all my devices and works just fine...1 thing to note, that if you have time to use a 500ma charger, let it do it, a little bit slower charge will extend the life of the battery(not necessarily run time, but the length of time the battery will hold as good of a charge).

I use the one below. Works pretty great..5V/1A, exactly what you'd need. The thing says iPod, but it can be used for any USB charged device. An extra nice feature of this charger is that it sits nearly flush with the dash of your car
http://www.bestbuy.com/site/Belkin+...hone/9235302.p?id=1218064404513&skuId=9235302
Link no longer works...see this post:
http://forum.xda-developers.com/showpost.php?p=7089814&postcount=6

Cool, thanks for the responses guys. I ended up going with the palm pre charger from amazon, a little pricey at $20, but that's the best deal I could find for it. I'd rather pay a little more than get one that will crap out on me in a month. And it terms of a slower charge (500ma) being more beneficial for a longer battery lifespan, I'd rather dish out $10-$15 in 6 months or so for a new battery than to have to deal with this ridiculously slow charging time

Another option for 1A (1000mA)...
Not to resurrect a dead thread, but I think this may be useful to know:
Several other EVO forums ("fora?") have reported great success with this low-profile charger. I just got it off of amazon myself...
http://www.amazon.com/Belkin-Micro-Auto-Charger-5VOLT/dp/B002F0200Q/ref=sr_1_1
You can also get 1-meter cables from Blackberry themselves on Amazon for $2.50 each, so if you have Amazon Prime, gets you a flexible solution for 11 bucks or so. I have ordered mine and will report back in 2 days...

Slappy_G said:
Not to resurrect a dead thread, but I think this may be useful to know:
Several other EVO forums ("fora?") have reported great success with this low-profile charger. I just got it off of amazon myself...
http://www.amazon.com/Belkin-Micro-Auto-Charger-5VOLT/dp/B002F0200Q/ref=sr_1_1
You can also get 1-meter cables from Blackberry themselves on Amazon for $2.50 each, so if you have Amazon Prime, gets you a flexible solution for 11 bucks or so. I have ordered mine and will report back in 2 days...
Click to expand...
Click to collapse
This is actually the same one I linked earlier minus the iPod cable and much cheaper
EDIT: Best Buy seems to have stopped carrying this product. I updated the link in my post above to Slappy_G's post

Slappy_G said:
Not to resurrect a dead thread, but I think this may be useful to know:
Several other EVO forums ("fora?") have reported great success with this low-profile charger. I just got it off of amazon myself...
http://www.amazon.com/Belkin-Micro-Auto-Charger-5VOLT/dp/B002F0200Q/ref=sr_1_1
You can also get 1-meter cables from Blackberry themselves on Amazon for $2.50 each, so if you have Amazon Prime, gets you a flexible solution for 11 bucks or so. I have ordered mine and will report back in 2 days...
Click to expand...
Click to collapse
+1
Been using this for months on many devices and it works great.

Slappy_G said:
Not to resurrect a dead thread, but I think this may be useful to know:
Several other EVO forums ("fora?") have reported great success with this low-profile charger. I just got it off of amazon myself...
http://www.amazon.com/Belkin-Micro-Auto-Charger-5VOLT/dp/B002F0200Q/ref=sr_1_1
You can also get 1-meter cables from Blackberry themselves on Amazon for $2.50 each, so if you have Amazon Prime, gets you a flexible solution for 11 bucks or so. I have ordered mine and will report back in 2 days...
Click to expand...
Click to collapse
I just ordered one from Amazon.com myself... I got it for free since I had a 10 dollar gift card that I forgot I had!!! Thanks for the link.

Do they make one with 2 USB ports? One for charging the phone and another for your Bluetooth head piece.

gottria said:
Do they make one with 2 USB ports? One for charging the phone and another for your Bluetooth head piece.
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Click to collapse
I'm not allowed to post links yet, but you can search for Scosche to find their products. They make dual port USB chargers.
Scosche makes a couple different models, one is advertised as having 2 amps over the two ports.
On a side note, I tried buying a blackberry micro usb cable off Amazon, and it starts to charge my phone for a second or two and then stops, it's very strange. I think it might work with the home charger, but I didn't check as I didn't notice till later that the charging stopped so soon.

Doing some cleanup and checking threads I promised to respond to...
The Belkin works great, and my wife has the 2-port Scosche. However, for me, NEITHER of them show "Charging(AC)" on either of our 2 Evo's. I have tried the charger in several cars, and same result. Not sure, but I'm guessing they are putting out incrementally less than 1A.
Not sure if that keeps the phone from triggering "quick charge" mode or not.

I just got 2 HTC car chargers from ebay, sent from Hong Kong. It says o/p:5.0V-2A so im not sure if I should use them.. here is what they look like.. http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=170511321504&ssPageName=STRK:MEWNX:IT
Does anyone have a OEM car charger? I would like to know how many amps it puts out. The wall charger is 1A so will 2A kill it? I sure wouldent use it much only if needed.

I have a charger from iGo, works great and has swappable tips so you can use it with other phones or devices, think it was $15-20 with a free tip.

Slappy_G said:
Not to resurrect a dead thread, but I think this may be useful to know:
Several other EVO forums ("fora?") have reported great success with this low-profile charger. I just got it off of amazon myself...
http://www.amazon.com/Belkin-Micro-Auto-Charger-5VOLT/dp/B002F0200Q/ref=sr_1_1
You can also get 1-meter cables from Blackberry themselves on Amazon for $2.50 each, so if you have Amazon Prime, gets you a flexible solution for 11 bucks or so. I have ordered mine and will report back in 2 days...
Click to expand...
Click to collapse
Can someone here confirm that this does deliver the full 1A? There is a review on Amazon from an EVO owner who says his phone sees this as USB and not AC charging.

rhconcepts said:
It says o/p:5.0V-2A so im not sure if I should use them..
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Click to collapse
If you were trying to draw three amps from a 2-amp capacity charger, you could damage the charger. However, a device that draws 1 amp from a 2-amp charger will draw one amp. Chargers don't push more amperage than is demanded: it's up to what the charging device is drawing. You and your device will be fine in having "too much" charger.

Thanks so much for the info. So this charger should work great then when I start using the sprint nav or google maps.

URABUS0924 said:
Can someone here confirm that this does deliver the full 1A? There is a review on Amazon from an EVO owner who says his phone sees this as USB and not AC charging.
Click to expand...
Click to collapse
Just received two in the mail.
FAIL
Recognized as USB charging in my car.

plus 1 for resurrecting a dead thread
I bought an off brand one (looks about identical) in a respectable local supermarket. It claimed 1.5A.. so overspecced (and no there's nothing wrong with overspeccing, devices won't draw more power than they can handle so long as the input voltage is correct).
Like the previous poster's belkin experience, my korean SGS (shw-m110s) saw it as a usb, not ac. I took it apart and shorted the data pins together, took about 5 minutes). Then it recognized as AC and charged a little faster I think, but still at empty (the fastest time to charge normally) it charges about 1% (1.5 mAh) in 2 minutes(.033 hours).. which is just under 500mA charge rate (450 but well within the measurement error and 10% loss seems quite reasonable anyway). Anyway, sure as heck isn't able to draw 1A off of it. The wall charger which is supposedly only 700 mA charges several times faster actually! (which is probably quite safe at low charge levels, but sure seems like alot more than 700mA too me, but I didn't measure it as well).
I suspect this gizmo was never actually meant to output 1.5A (as it's not configured as a quick charger) or if it does, it only does it with large losses, and an internal voltage drop that's too excessive for the SGS to still be capable of actually pulling that much current.
Wish I knew what to buy.

I Have been using the official palm charger since June. I picked it up at sprint corporate store or radio shack. It is rated for 1 amp and come with a nice short micro usb.
If I were buying today I would go with one of the Platinum branded items Best Buys sells. I saw them for the first time last night so they must be new. So far I have purchased the Pt branded case for EVO and 2 different mounting kits. All of their stuff seems top quality. The have a 2 amp single usb and a 3 amp dual usb model that I saw.
Sent from my PC36100 using Tapatalk

Cheap charger

Hi Forum! I've two originals batteries for my GS2. I'd like to buy an external charger, but the original samsung is too expensive. I'd like to know the requirements for a battery charger, in order to buy a charger not dangerous for batteries: the cheaps chargers that is possible to buy from internet at 5 $, are dangerous ? There original charger have same protection circuit of charge ?
thx a lot

I'd stay away from those entry-level chargers if I was you.. Your GS2 is expensive enough to deserve better.
Personally, I find that the original Samsung charger is a bit weak (800mA/H max if I remember right. It's by my bedside and I'm too lazy to climb upstairs and check it ^^) and takes forever to recharge a battery to 100%.
So pretty soon after I switched from my HTC Desire S to the SGS2 (following an "eMMC brick" that left the HTC running, but in dire condition -it's slower than an asthmatic snail now), I "recycled" the original HTC charger plus the two more I had just bought for it (1 wallsocket and 1 special for cars with the adapter. Ironically, they were in the mail being delivered when the HTC got bricked).
I find them way better because 1) they're cheaper but seem to have the same kind of safety electronics packaged inside, since the amperage of the two devices is relatively close
and 2) they pump out 1000mA/h and they don't seem to bother the SGS2 too much, which charges a lot faster now and without any noticeable side-effects on the batteries (and I got 4 batteries, ranging from the stock 1650mA/H to 2000, so me knows what I'm talking 'bout, believe you me.. ^^).
I've heard that you can go even higher than that in the amperage of the charger, provided that it's specifically designed for smartphone use, but I don't feel like investing money in this just now, I'll need other batteries before I need another charger I guess

Snakeforhire said:
I'd stay away from those entry-level chargers if I was you.. Your GS2 is expensive enough to deserve better.
Personally, I find that the original Samsung charger is a bit weak (800mA/H max if I remember right. It's by my bedside and I'm too lazy to climb upstairs and check it ^^) and takes forever to recharge a battery to 100%.
So pretty soon after I switched from my HTC Desire S to the SGS2 (following an "eMMC brick" that left the HTC running, but in dire condition -it's slower than an asthmatic snail now), I "recycled" the original HTC charger plus the two more I had just bought for it (1 wallsocket and 1 special for cars with the adapter. Ironically, they were in the mail being delivered when the HTC got bricked).
I find them way better because 1) they're cheaper but seem to have the same kind of safety electronics packaged inside, since the amperage of the two devices is relatively close
and 2) they pump out 1000mA/h and they don't seem to bother the SGS2 too much, which charges a lot faster now and without any noticeable side-effects on the batteries (and I got 4 batteries, ranging from the stock 1650mA/H to 2000, so me knows what I'm talking 'bout, believe you me.. ^^).
I've heard that you can go even higher than that in the amperage of the charger, provided that it's specifically designed for smartphone use, but I don't feel like investing money in this just now, I'll need other batteries before I need another charger I guess
Click to expand...
Click to collapse
I'm sorry, but my questions was referred to charger EBH1A2USBE, that is a battery charger stand.
Is this charger dangerous for battery ? Have this charger a chip to control tha charge of battery ?
thx

I got a charger off Ebay for cheap and it caught fire. If you value your life avoid the cheap knockoffs!!

agree with above posters, stayy away from cheap knock offs, buy OEM.

It is at 13 USD on Exportprive so not to expensive and real samsung
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Best portable battery?

Hi all,
I'm wondering if anyone has any experience with portable battery packs. I don't mean extended batteries either. I mean the universal usb charger kind that packs several thousand mAh.
I'm looking to get one for a nine hour flight, and I want to know what is a good brand.

Luuthian said:
Hi all,
I'm wondering if anyone has any experience with portable battery packs. I don't mean extended batteries either. I mean the universal usb charger kind that packs several thousand mAh.
I'm looking to get one for a nine hour flight, and I want to know what is a good brand.
Click to expand...
Click to collapse
I can't answer your question, but a lot of planes have a USB/charging input now. I know when I fly Air Canada, they have it.

I have had an Energizer XP18000 for about 3 months now and it has surpassed my expectations.
It holds 18000 mAh of power and will charge my Gnex and my Xoom at the same time (need to order a special tip for the Xoom/non standard device). I use it for long train rides to keep my phone topped up.
When watching HD video over 4G my battery level will drop about 1-2% every half hour, so it is not charging as fast as the wall charger, but it is enough to keep you from having a dead battery when you get to your destination. With my usage I can go 3 to 4 days and never need to look at a wall outlet.
The size is about as big as a external hard drive. There is also a wall charger that has a good size power brick in the middle of it. You can remove it when you don't need the wall charger, but I keep everything in one small bag so all I have to do is set it down next to an outlet and top up the external battery, then fold the cord into the bag and pull out what ever cord I need when I am on the move. It works just fine with the original Samsung usb charging cable.
I picked mine up from Amazon but you might be able to find a better deal if you look hard enough. They make a smaller model too that is only 8000 mAh.
I always keep it in my bag and it works so well for me that I don't even need the extended battery and leave 4G on all the time.
http://www.energizerpowerpacks.com/us/products/xp18000/

Beautiful. Thanks Dante. And yeah, I heard some planes have USB chargers now. Unfortunately I'm not flying with them. I live near YVR, but Air Canada is having a bunch of problems with their workers right now. Last thing I need is flight delays or bad service.

I did a ton of research before buying mine. I wanted a pocket sized one, that had large capacity (enough to fully charge the phone twice), and could charge a device at a full 1 amp. After much research, I bought the original version of this one:
http://www.newtrent.com/store/iphone-external-battery/iphone-battery-imp50d.html
Mine has less markings and I believe both ports on mine are 1 amp, where as the new one has one 500mA and one 1A port. Mine was also like $55, this one is on sale for barely over $40, an even better deal.
It is very powerful - 5,000 mAh will charge the phone 3+ times - much bigger than other "pocket batteries", fits in a pocket nicely (I wear cargo pants) because it's skinny, like a deck of cards. Fairly light too. Only complaint is that I bought it before MicroUSB became the new standard, so it charges with miniUSB instead.
I carry a retractable mini-usb cable, and a retractable microUSB cable, in an altoids tin, in in my pocket with it. Works great, can charge my friends phones at the same time as me. Had it for 2 years, still going strong!
There are newer designs they have now too if you look at their website.
It does take a long while to charge - 8 hours to charge fully or so if you charge off a 500mAh USB port, because it's a huge battery! a lot less maybe 4 hours if you charge off a high speed 1A charger.

i was looking at this one http://www.amazon.ca/Anker-8400mAh-...UTF8&coliid=I3IVVC4G6YETK&colid=1ILTNQ88L4FE5
it has a 2amp 5v port, this can charge a transformer prime with the screen off.

I got this one recently:
http://www.amazon.com/Anker-SlimTal..._1_2?s=wireless&ie=UTF8&qid=1335035472&sr=1-2
Its (much) smaller than my Nexus, has a built in micro-usb cable, and charges via micro-usb as well. While it doesn't have the capacity of those listed above (only 3200mAh), it was only $20 and the size really does let you take it everywhere.
It can fully charge it the phone from dead about 1.5 times.
I bought mine due mainly to the fact that it includes the micro-usb cable that hides away when not in use. It has a standard USB port as well for charging other items, but the appeal of only having to carry one item and no extra cable sold me.
My only complaint is that the built in cable could be a bit longer.
It has a flashlight too... lol

Been researching this topic lately and found that Anker's 10,000mah external battery is looking the best
Sent from my i9250 (GSM) Galaxy Nexus.
[email protected]

I use the Veho Pebble and it's fine for my needs. I get 2 charges out of it.

after hours of my own research I also bought the Anker Slimtalk. I dont travel enough to need one that is huge and can charge my phone 8 times. This seems small enough to toss in my pocket and not bother me since its so thin and light. For $20 and the convenience of having its built in micro usb cable sounds like a perfect little invention to get me through the day.
If I traveled more I would of probably got the Energizer XP8000. Their tip program is awesome. Free tips for life but really its $2 shipping each. if you want this device to charge a whole bunch of things it can. My Acer netbook, EVO 3D, girlfriends RAZR, 3DS, bluetooth, iPad 2, Nook, and the list goes on. I've been trying to ask New Trent for almost a week if their products would be compatible with the Energizer Tip program but found that contrary to what I've read their customer support is terrible, but their prices are better than energizer. So they loose out on the sale since over the last few times of researching has allowed me to find the Slimtalk which for the price and for my needs is perfect.

Curb71 said:
after hours of my own research I also bought the Anker Slimtalk. I dont travel enough to need one that is huge and can charge my phone 8 times. This seems small enough to toss in my pocket and not bother me since its so thin and light. For $20 and the convenience of having its built in micro usb cable sounds like a perfect little invention to get me through the day.
Click to expand...
Click to collapse
Exactly why I went with it. Even while traveling I'm generally within range of a car or home charger, especially now that pretty much everyone without an iPhone has a micro USB charger somewhere.
I just wish it had a built in AC adapter as well but I'm sure the size would increase by quite a bit. Someone (iGo maybe) makes one like that but it only has about an 1100mah battery if I recall.

I found something here in the Netherlands, and I'm not quite sure if you guys in the US have the same thing..
The thing this has going for it is it's portability. It fits in your pocket, and if you don't mind a big lump in your pockets, it even fits together with your phone.
Click over there <<< to check out the dutch website of duracell. It basically is a battery with a socket plug on it, and 2 USB outlets.
Tech. info:
Output voltage: 5 volts DC
Input voltage: 5 volts DC, max. 1 amp
Capacity: 1800 mAh
Offcourse, this is the dutch version, with the dutch socket plug, but maybe there's an US version as well?

Thanks for all the info here guys. I have that crappy Black and Decker Pocket Power from a few years back, that well, isn't living up to the charge these days, so I need something else.
Still a bit too many options, but I'm sure I'll find one that works the best.

Quick and Inexpensive USB wall charger?

I just lost my USB wall charger and realized my spares don't charge as fast as my previous one...
My previous charger had my phone at +700ma while in sleep, two of my spares can do 400 and one can only do 200!
One time I used a car charger that had me at +900ma in sleep so I would like to try and find a new wall charger that can get me +900.
BTW all the chargers I have used have said they are 5v 1000ma, so clearly I can't just go by the specs they list- I need a first hand experience of a quality charger.
So I open it to the forums. Anyone here have experience of a particularly strong USB wall charger?

I got a good Motorola one on Amazon for pretty cheap and it's been going strong for a while.
Sent from my GT-N7100 using xda app-developers app

Well, you do need one that's 1000mAh.
You just need one from a reliable manufacturer that's not mis-labelled crap.
I'd just look for a quality brand. I got lucky with one for $1.50 on eBay but the seller isn't selling them any more.

Hm so I guess OEM or genuine name brands should reliably be up to their specs, then? Well, I guess I'm going to shop around for one that maybe says 1500ma or more because I believe my phone can take more than a 1A charger can give it, and it probably won't disappoint

Samsung note II have a battery of 3,100mAh, the charger is 2000mA(2A). but my i can use the same charger for my S2. so i guess that the amphere doesn't really matter. just that the higher the amphere of the charger, the faster it charge. But you sure need a higher amphere charger for bigger battery. Hope this help.

seacreature said:
Samsung note II have a battery of 3,100mAh, the charger is 2000mA(2A). but my i can use the same charger for my S2. so i guess that the amphere doesn't really matter. just that the higher the amphere of the charger, the faster it charge. But you sure need a higher amphere charger for bigger battery. Hope this help.
Click to expand...
Click to collapse
I've read that smartphones (at least android phones) have controlled charging circuits that will only allow for as much amperage as they are set to allow. So if you connect a 2000mA charger to the phone but it's limited to 1000mA then it will only draw 1000mA. However as I have noticed just because a charger says it can output 1000mA doesn't mean that it can. I have tried 4 different 1000mA chargers each with pretty different outputs- and if they don't output as much as your phone will take it WILL charge slower. The point of this thread was to gather information on which chargers are reliably fast and ideally economical ones (there's enough OEM chargers I can find for 10x the price of off-brand ones that would hopefully do the job right).

[Q] Recommendation for a car charger and a power bank

Hi guys,
I have a very bad battery life on my OPO (max 2-2:30 SOT), and I need a good car charger while I use GPS, and a power bank.
I would appreciate it if you can give me links on ebay.
BTW, is it safe for the phone to use these chargers?
Thank you!

Maya2015 said:
Hi guys,
I have a very bad battery life on my OPO (max 2-2:30 SOT), and I need a good car charger while I use GPS, and a power bank.
I would appreciate it if you can give me links on ebay.
BTW, is it safe for the phone to use these chargers?
Thank you!
Click to expand...
Click to collapse
http://www.amazon.com/dp/B00D82O68Y/ref=cm_sw_r_udp_awd_zcMEvbJ3P1E63
http://www.amazon.com/dp/B00SUY4KPY/ref=cm_sw_r_udp_awd_-dMEvb8S92V0C
I feel that the OnePlus bank is a solid choice. I've been very pleased with mine.
The charging rate with screen on is limited. The stock amperage limit with screen on is 1A. I get notably better current flow on CyanideL (likely a kernel thing).

Coug76 said:
http://www.amazon.com/dp/B00D82O68Y/ref=cm_sw_r_udp_awd_zcMEvbJ3P1E63
http://www.amazon.com/dp/B00SUY4KPY/ref=cm_sw_r_udp_awd_-dMEvb8S92V0C
I feel that the OnePlus bank is a solid choice. I've been very pleased with mine.
The charging rate with screen on is limited. The stock amperage limit with screen on is 1A. I get notably better current flow on CyanideL (likely a kernel thing).
Click to expand...
Click to collapse
Thanks for your reply.
Amazon doesn't ship to my country.
Do you have a link on Ebay or Aliexpress?
Regarding the power bank, do you recommend the One plus bank than the Xiaomi power bank 10,400mah?
Thanks again!

The OPO bank is a safe choice, since it's from them and likely tested by most forum members to be accurate.
Xiaomi, especially on Aliexpress and eBay, has a LOT of fakes, obviously cashing in on the brand and shortages. Make sure it has branding inside the USB ports if you are buying Mi. The 16000 is a less faked model, since it's newer and uses a different form factor. The advantage it has over the OPO bank is it supports 2A on both ports, and gives max current of 2.1A / 1A total when two devices are plugged in.
With the OPO, it gives 1A / 1A when two devices are plugged in, and 2A maximum on a single device. If you do not charge multiple devices often, the OPO is cheaper and less likely to be fake.

RootTwo said:
The OPO bank is a safe choice, since it's from them and likely tested by most forum members to be accurate.
Xiaomi, especially on Aliexpress and eBay, has a LOT of fakes, obviously cashing in on the brand and shortages. Make sure it has branding inside the USB ports if you are buying Mi. The 16000 is a less faked model, since it's newer and uses a different form factor. The advantage it has over the OPO bank is it supports 2A on both ports, and gives max current of 2.1A / 1A total when two devices are plugged in.
With the OPO, it gives 1A / 1A when two devices are plugged in, and 2A maximum on a single device. If you do not charge multiple devices often, the OPO is cheaper and less likely to be fake.
Click to expand...
Click to collapse
Hi there,
Thanks for your reply.
I can buy only from Ebay or Aliexpress, because One plus doesn't ship to my country.
The One bank is about 30USD over there, and the Xiaomi is half price, that is why I thought of it, but it is hard to know if either of them is fake.
Do you have an idea about a decent car charger?
Thanks again for your help.

Maya2015 said:
Hi there,
Thanks for your reply.
I can buy only from Ebay or Aliexpress, because One plus doesn't ship to my country.
The One bank is about 30USD over there, and the Xiaomi is half price, that is why I thought of it, but it is hard to know if either of them is fake.
Do you have an idea about a decent car charger?
Thanks again for your help.
Click to expand...
Click to collapse
Anything that is a 2.1A car charger should do it. If you are unsure of the quality, you could always get a charge doctor for $2 USD on Aliexpress, which will tell you if the port is good or not. For example, if the reading shows 0.5A output or less, the product is garbage and you should demand a refund. I suggest getting one if you buy chargers and power banks on eBay, since it can validate how good (or bad) your product will be.
If you still want the Mi bank, two things to look for are the small Mi logo inside the USB output ports, and test to see if you can still charge your device while the power bank itself is charging (pass through charging). These two features are hard to fake. Do not rely on serial number stickers, since counterfeiters will sometimes put a fake power bank inside a real box that they salvaged from someone else.

RootTwo said:
Anything that is a 2.1A car charger should do it. If you are unsure of the quality, you could always get a charge doctor for $2 USD on Aliexpress, which will tell you if the port is good or not. For example, if the reading shows 0.5A output or less, the product is garbage and you should demand a refund. I suggest getting one if you buy chargers and power banks on eBay, since it can validate how good (or bad) your product will be.
If you still want the Mi bank, two things to look for are the small Mi logo inside the USB output ports, and test to see if you can still charge your device while the power bank itself is charging (pass through charging). These two features are hard to fake. Do not rely on serial number stickers, since counterfeiters will sometimes put a fake power bank inside a real box that they salvaged from someone else.
Click to expand...
Click to collapse
Are these charge doctors reliable?
If I buy one plus bank on eBay, is it safer than the Xiaomi one?
Thanks!

Maya2015 said:
Are these charge doctors reliable?
If I buy one plus bank on eBay, is it safer than the Xiaomi one?
Thanks!
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Yes they are. It's a simple circuit with a high resistance to measure current and an LED readout. A few forum users have them to do readouts, and they can detect bad wall adapters and cables too. They are accurate +/- 50mA, which is good enough, considering a bad output will be off by 500-1500mA.
As for safety, eBay is always a gamble. I would go for a seller with a return policy, so if your charge doctor test shows the product is defective or fake, you can send it back.

RootTwo said:
Yes they are. It's a simple circuit with a high resistance to measure current and an LED readout. A few forum users have them to do readouts, and they can detect bad wall adapters and cables too. They are accurate +/- 50mA, which is good enough, considering a bad output will be off by 500-1500mA.
As for safety, eBay is always a gamble. I would go for a seller with a return policy, so if your charge doctor test shows the product is defective or fake, you can send it back.
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Just ordered one from Aliexpress for 1.29USD
Also ordered a Belkin car charger from eBay. (probably a fake one)...
If it is less than 2.1a, is it unsafe for the phone, or will just charge slowly the phone?
Thanks!

Maya2015 said:
Just ordered one from Aliexpress for 1.29USD
Also ordered a Belkin car charger from eBay. (probably a fake one)...
If it is less than 2.1a, is it unsafe for the phone, or will just charge slowly the phone?
Thanks!
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Click to collapse
2.1A is the maximum output, which is more likely to be closer to 1.7A because of cheap parts. What you are concerned with is the minimum rate. It should charge your phone at a minimum of 0.7A, unless your charging cable is bad. You can find out which charging cable is better by connecting them one at a time to the charge doctor connected to the wall wart and picking the cable that gives a higher current output. This is how I sort out all the charging cables I get from eBay, and a good number of them have bad pin shorts that lead to them being capped at 0.5A.

RootTwo said:
2.1A is the maximum output, which is more likely to be closer to 1.7A because of cheap parts. What you are concerned with is the minimum rate. It should charge your phone at a minimum of 0.7A, unless your charging cable is bad. You can find out which charging cable is better by connecting them one at a time to the charge doctor connected to the wall wart and picking the cable that gives a higher current output. This is how I sort out all the charging cables I get from eBay, and a good number of them have bad pin shorts that lead to them being capped at 0.5A.
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I have the original One plus cable, so this shouldn't be the problem.
I will check the car charger once I will get the charge doctor.
Thanks for all the info.!