Develop Bugs

1800mah battery from china

Just got one of these in the mail off ebay for 7.88. anyone else have one? For 8 bucks it was worth a try.
Linky

I saw these on ebay a few days ago and was wondering about them. I'm anxious to hear your opinions on it.

I just got mine today. First charge with the phone off turned green in like 30 minutes? Went down 20% pretty fast, like an hour. So I popped it on the charger again with the phone on this time. Again relatively fast charge to full. I am now at 60% after 4hrs44mins. Not so good. I'll have to get a few more charges to get it to full capacity I think. My stock battery sucked at first too. Haha, we bought from the same guy! I also have a freebie used TP2 battery from my sprint store. I haven't used it much but so far its not as good as my stock but good for backup. Still waiting on my battery charger from that same seller. Lol. I'll let you know how it goes with this new "1800mah" battery. The first days are never too good.
Sent from my PC36100 using XDA App

got 12 hrs on it yesterday moderate use and still had 60% left. ran it down last night too just to calibrate it.

I bought a two pack of 1500 mah batteries with the USB charger for the desk for I think $12 ish. The batteries are pretty decent. I cant tell a difference between the OEM battery and either of the china batteries. But again, this was the 1500mah batteries sold by a different guy from china. I've got some ebay money, maybe I'll buy this 1800mah and test it and get results up here...
Here the link to the batteries I bought : http://cgi.ebay.com/2X-1500mah-Batt...ewItem&pt=PDA_Accessories&hash=item335df8101f

I got 2 (red ones) with a usb/wall charger for like $20 for my wife and I. I get through the day no problem, my wife doesn't use hers as much and still has 30 percent at the end of the day. we made sure to run them completely dry first, then charged them overnight in the battery charger that came with them. I know people have opinions about the "memory" and will tell me its not necessary to drain and charge, and that's fine. i'm just sharing what has always worked for me. at the end of every day i put the stock battery back in and put the 1800 in the wall charger and get better results then when I just plug the phone in.
Sent from my PC36100 using Tapatalk

how are yall getting like 12 hrs... with 60% left? im getting no where near that...

I have really good coverage here. Ive got all my bars in my house. Im going to give the battery a good week till i can really comment on it. It seems just as good as the stock so far. Once it gets thru some charge cycles the battery will perform better. New batteries need to be broke in.

Yeah, I don't get really good coverage here. I've always had battery issues. But this EVO has been the longest lasting so far. I had the 6700, mogul, touch pro. My stock battery can go about 20hrs with moderate usage. I'll keep you guys posted.
HTC EVOから投稿

Just an update. On my 2nd day of using the 1800. I got a little over 17 hrs before it went red. I got my battery charger from the same guy today and am currently giving the 1800 a test charge. Will let you know how it goes. I still a solid 20hrs of use from my stock battery.
HTC EVOから投稿

Honestly I can't tell any difference from the stock battery. Seems to perform just fine.
Sent from my PC36100

Yeah, I got 22 hours yesterday. So, looking like about the same as my stock. Tried charging the stock battery with the Chinese charger and it seems about the same. All is good I guess.
HTC EVOから投稿

My 1800 batteries are working great, 2 weeks in.

Im running my battery cycler/ charger on this battery now trying to discharge it to 3v and charge it up and see how man mah i put back into the battery. Ive got a R/ C hobby battery charger that will do this with all types of batteries. Just making the connection is the hard part.
Ill test out the capacity of my extended 2700mah pack when im done with this one.

Well, looks like this battery kinda under performs. I charged the battery up to 1754mah 4.2v. After sitting on the bench for 10 mins i check the voltage and it had dropped to 4.056v. I then installed into my phone and im all ready down to 88%. Oh well.

Just received my 2000 mAh slim battery

I have used the siedio 3500 for about 8 mo and it is a great battery. The reserve power is amazing. But at times I want the slim sleek Evo I purchased and like to switch back. My phone has all of the mods most Evos are running and I am quite happy. I recently purchased a Battery from eBay for $14 to test and wow! I am very pleased w this battery. It has more than met my expectations and while I have not done my true power using tests yet I can confirm it is an upgrade from the stock 1500 HTC. Placebo...maybe as the stock unit is close to a year old...but being able to have just a few more hours for a days use is very important. I use SBC and have never ran into any issues. I'm sure its nit going to produce these results for everyone but w my setup and it constantly gettijng dialed in it is well worth the $14 on eBay.
Just wanted to let people know that are lookking for a nice stock battery size upgrade that this is the one you have been wanting!

stkiswr said:
I have used the siedio 3500 for about 8 mo and it is a great battery. The reserve power is amazing. But at times I want the slim sleek Evo I purchased and like to switch back. My phone has all of the mods most Evos are running and I am quite happy. I recently purchased a Battery from eBay for $14 to test and wow! I am very pleased w this battery. It has more than met my expectations and while I have not done my true power using tests yet I can confirm it is an upgrade from the stock 1500 HTC. Placebo...maybe as the stock unit is close to a year old...but being able to have just a few more hours for a days use is very important. I use SBC and have never ran into any issues. I'm sure its nit going to produce these results for everyone but w my setup and it constantly gettijng dialed in it is well worth the $14 on eBay.
Just wanted to let people know that are lookking for a nice stock battery size upgrade that this is the one you have been wanting!
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I have that same battery in the 1750 and have had it for well over 8 months It has beaten my stock battery by at least and hour or 2 of extra time on a normal basis. Post the link to where you got yours incase others want to purchase

http://www.ebay.com/itm/HTC-EVO-4G-Extended-Slim-Battery-Galilio-2000mAh-/150594275644

Galilio are awesome ive used 1 for the past year and get well over a day vs 6 on my stock.

The price is unbeatable.
Not completely fair as I have been around wifi.

id like to see that on pure 3g
Id like to get me the TP2 battery as seen on batteryboss
2150mah in my evo!!

I guess, but it doesn't look like you use your phone much at all. Did you wipe your batter stats and run it for at least a week before passing judgement?

I didn't beat it up. That test is tomorrow. I did state that. But as you can see it was used it didn't sit around. If you don't want to buy it lol...don't...I am posting up for the people interested in a better than stock replacemnet. Which it clearly is.

Your display was only 5% o.0 .. you barely use ur phone.

Does anyone even look at awake time? ****. My display stays at 25% brightness. Run it any higher annnnnd the number goes up. Wow at the misinformed owners here.
Also I am on aosp so my stats may vary from a sense rom stats.

stkiswr said:
I didn't beat it up. That test is tomorrow. I did state that. But as you can see it was used it didn't sit around. If you don't want to buy it lol...don't...I am posting up for the people interested in a better than stock replacemnet. Which it clearly is.
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I'm skeptical, especially after there's been battery tests that prove for a fact that a whole host of advertised ratings for aftermarket batteries ended up being way over inflated, including name brand stuff like Seidio. I'm just having a real hard time believing that they were able to cram an extra 500mAh into the same form factor when the OEM 2150mAh is almost twice as thick and requires a new battery door. But by all means, discount my comments by calling me uninformed and using anecdotal evidence after a day or 2 of use to prop up your claim.

Lmao what a joke this has turned into. Be skeptical all you want. Maidenly difference for me. I own a seidio 3500 and can laugh at anything you say to disprove it's ability..this 2000 has only seen 2full charges and does better than the 1500 stock unit. If u aren't looking for a slim battery...or do not have a few bucks to spare then I don't have to prove it to you. Whip out your card. Buy one. Then hit the thanks button on my thread. Since I don't work for this battery manufacturer I really don't need to argue have and forth w everyone that loves their stock battery and are skeptical haha.
Don't forget thanks

stkiswr said:
Does anyone even look at awake time? ****. My display stays at 25% brightness. Run it any higher annnnnd the number goes up. Wow at the misinformed owners here.
Also I am on aosp so my stats may vary from a sense rom stats.
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Relax yourself .. And obviously people look at awake time to see how much YOU USE YOUR PHONE. Just cause you have no friends to text or call since your screen is off MOST OF THE TIME, doesnt mean you have to get all rowdy.
This is uninformative. My Screen is at 14% brightness and my display uses 40% .. does that not tell you something? So sthu.

It tells me Your on a sense rom smart ass
I still dont get 40% unless i run sense
Whats ur point to argue batteries. Lmao enjoy yours.

Thia is a workout. Murdered it today.

And here ya go. Youtube. Boring heavy day. Terrible waste. Lots of use lmao.

Last update and thread can die haha
I had a runaway eBay sucking today but after over 3 rough hours I am happy. Normally I would be at 50%. This includes 10 mins talking. 75 texts. 10 mms. Browser. YouTube. Much screwing w phone. Emails. All data is on auto sync. Only thing I had to do was log oout of eBay. Caused a 40 min wakelock. Out of this time the phone has actually been screen off maybe 30 mins.

Hey man, more power to ya. I get similar performance on my stock battery but if you want to believe that there's something magical about this battery go ahead, it's not that expensive anyway so at the very least you got a spare. I'm just saying that if it sounds too good to be true then it probably is.

churro7 said:
id like to see that on pure 3g
Id like to get me the TP2 battery as seen on batteryboss
2150mah in my evo!!
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I purchased one of those from eBay, great battery life for me, I use my phone too much and with stock I was lucky to get 4 hours, but with the 2150mAh I easily get 14 hours of heavy / almost constant use. Thats on wifi and some 3G, I have very poor reception home so but out doors using 3G and some 4G (where I actually do get some) and tons of txt and gaming and all I've gone through a full day without charging. Btw, I'm running GM v1.1 kernel overclocked to 1075 max and 422 min. I really like my Evo with the stock, but I like better battery life more

me too!! where did ya get ur tp2 2150mah battery?

GTMax 3500 mAh battery - Poor battery life still

I was wondering how many people got these on sale(12 bucks on amazon) and what results they got.
Ive had mine through a couple charge cycles now and im not impressed at all, doesnt feel like its doubled my battery life.
Im at 80% after 2 hours, with only 16 minutes of screen on time. This might actually be worse than stock. The battery summary doesnt show any major drain from apps, and go launchers running app list doesnt show anything out of the ordinary either.
Im running Faux 0.9/Juggernaut 4.1/Litening theme
Im not sure what else I can do, battery is draining ridiculously fat.

It could be just be a defective one. Some custom roms dont recognize the batter stats properly as well. Try exchanging the battery for a new one and also try a different rom. Also try Wipe Battery Stats in clockworkmod recovery.

anomy13 said:
It could be just be a defective one. Some custom roms dont recognize the batter stats properly as well. Try exchanging the battery for a new one and also try a different rom. Also try Wipe Battery Stats in clockworkmod recovery.
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Hmm, thats kinda scary, would reflashing a rom from scratch fix that?
Also, google has stated wiping stats does nothing, thats a recent development.
As for exchanging, its from amazon, it took 3 weeks to ship this one to me lol.
It might be defective, it did take 9 hours to charge. 3500/650 should be ~ 5.3 hours, but maybe this is why it was on sale for 12 bucks.

Yes, the myth was that wiping battery stats improves the overall battery life but I was not saying this in hopes of improving it. I was just saying to see if it will correctly display how much battery life you have on your rom because one time I had a problem where my battery life stayed at 100% and after wiping it it correctly displayed how much I had left.
If it takes 9 hours to charge then I think its very likely that you do have a defective one. Rechargeble batteries tend to show that kind of symptom when you charge it often without letting it drain first. Try completely draining your battery below 10% and fully charge without stopping (dont pull the plug). If the battery life is still the same and it still takes around 9 hours to charge then I think its safe to say you do you have a defective one.
Also, please double check that the particular battery that you have is compatible with SGS2 Hercules model. Look at the battery information and compare it to the stock one. Make sure the voltages match.

I flashed Mr X's kernel, since Faux has been off since 0.07 for me.
When i charged it last night, it was from 0%, and it took around 3 hours to reach 34%, so im estimating the 9 hours based on that.
The stickers on it say 'Replacement for Hercules T989' Li-Ion 3.7v, i dont have my stock battery atm so i cant see if its the same, ill check that later.

I find it faster to charge using the usb plug converter instead of off the laptop using the usb cable. If I were you, I'd just use the stock battery until the new one ships in. I believe that's your best bet.

I may not even seek a replacement. It was 12 bucks, shipping would cost half the cost of the battery, and it would take them 3-4 weeks to ship another. The original order took 3.5 weeks to be delivered.

Rekzer said:
I may not even seek a replacement. It was 12 bucks, shipping would cost half the cost of the battery, and it would take them 3-4 weeks to ship another. The original order took 3.5 weeks to be delivered.
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Really a 12 dollar battery sucks..never would have suspscted

cwalker0906 said:
Really a 12 dollar battery sucks..never would have suspscted
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Click to collapse
Its reg price 40

Rekzer said:
Its reg price 40
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Click to collapse
Nothing decent is on sale at that deep of a discount.
Sent from my SGH-T989 using xda premium

Well then, they shouldnt sell it in the first place. Now I'm wondering what kind of reviews it got on that site.

Peal off the cover of the battery. It should say how big the battery actually is. I highly doubt its 3500. But you never know

twolfekc said:
Peal off the cover of the battery. It should say how big the battery actually is. I highly doubt its 3500. But you never know
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I was about to say this. You more or less likely got a fake Chinese battery that claims it's "..." mAh, but in reality it's significantly less. I've seen this happen too many times on the EVO 3D forums.

Theres no label, the writing is printed on.
http://www.amazon.com/GTMax-Capacity-Extended-Replacement-T-Mobile/dp/B006MCL04U
This is it here.

Here is one of the reviews: Looks like the same story as yours.
2.0 out of 5 stars Lasts same as the original, January 19, 2012
By Sunny - See all my reviewsThis review is from: GTMax High Capacity Extended Replacement Battery (3500mAh) for Samsung T-Mobile Hercules SGH-T989 (Package include a Neck Strap) (Wireless Phone Accessory)
I was excited to get this battery thinking that it would atleast give me one and half times more backup than the original. However, the backup i'm getting is not any better than the original battery. I will see for a couple of more days and if it is still same, i'll move back to the original battery and keep this one as back up. Help other customers find the most helpful reviews
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Most cheaper priced batteries out there engage in false advertising. Don't believe the mah numbers you see even if they are the same as the stock oem battery. Its cheap for a reason just like the fake micro sd/flash drives for sale at Ebay. There are also shady vendors in Amazon who pump up their own ratings by leaving positive reviews especially the "ProdiCell" cell phone battery brand. With the exception of Seido and Muge, I would only stick with Samsung oem batteries. The Samsung Nexus extended oem 2100 mah battery is really good for $24.99 (50% off 49.99 at the Verizon store). I do see the extra 14% life. I went 34 hours the other day on stock 2.3.6 before my phone died. I actually ran 30mins of video at the end to run out the charge.

Ill try this out with synergy, since faux i heard was a drainer, and if no luck ill stick my stock battery in and continue to use my ballistic case. Ill also give it one more day.
Never tried an alternative battery till this one, and if im gonna go bulky again ill get that 3900 mah mugen, since that appears to be the real deal.

Rekzer said:
Ill try this out with synergy, since faux i heard was a drainer, and if no luck ill stick my stock battery in and continue to use my ballistic case. Ill also give it one more day.
Never tried an alternative battery till this one, and if im gonna go bulky again ill get that 3900 mah mugen, since that appears to be the real deal.
Click to expand...
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Batteries are one thing you really get what you pay for.
Sent from my SGH-T989 using xda premium

But!.....how are you digging that lanyard??

mettleh3d said:
But!.....how are you digging that lanyard??
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Gonna wear it to a club and see if it lands me a date.

3250 mAh battery review (stock battery size)

It's getting late......after a long day waiting for this 3250 mAh battery to go flat, here is my review for what it is worth.
I have been searching for a month to find a battery that had the capability to last me all day. Not a bulky one! One that would fit within the original case. Not make my phone look pregnant.
I wanted a battery that i could Take off charge at 8am being able to last me all day, with LIGHT to MEDIUM usage (not heavy use!), right up until I went to bed at 10 and put it back on charge.
Is this the one??? (battery photos below)
I sourced this one. It just about fits the phone. I had to peel the battery label off at all 4 corners to get it in. It's fits in fine with standard Samsung back on. No bulge. I put in straight into my phone and charged it up to 100% then took it off charge and restarted the phone.
I'm not expecting amazing results on this first drain as I am more than aware it will take 3 to 4 cycles to gain it's full effectiveness. I am however expecting it to beat my standard battery display time on this first drain as it holda 34% more charge and then improve again after 3 more days use!
My stock Samsung battery lasts normally 4 hours display time with light to medium use. I have google location turned off, brighteness to auto and i am running gingerbread LA6. Full Samsung stock fresh out of the box. No root. No mods at all. And I have all the Samsung crap turned on and registered. I have google email with 2 accounts running. I play the odd game, and text and email like crazy. I used Ebay app heavily and also surf the Web lots. There are widgets on all 7 screens running and I always have a heavy usage live wallpaper running.
Phone finally starting to go flat... I will take screen shots of battery use and upload them. With my finally thoughts and finally 1st battery use screen shots as soon as it goes flat.
And obviously I'll look forward to your valued thoughts and views and make use of your experience as I'm new to this.......hopefully won't be too long!
Bye 4 now
1st day results in.
2nd day results in..
Photos of battery weights...
3Rd day results...
Sent from a noob on a new note

Where did you buy it ?

..

is thic ?
http://cgi.ebay.fr/3250MAH-Gold-HIG...SAMSUNG-GALAXY-NOTE-I9220-N7000-/290677438392

Yes
Sent from a noob on a new note

Ok..finally ran out of juice.
Remember this is not scientific just based on my daily normal use. But I did use my phone near enough full time today to make it go flat to see what it could do.
Again this is the first charge out of the bag. And I am interested to see how it gets on over the next few charges.
First Days below... More on day 2 tomorrow.
Sent from a noob on a new note

During the day there have been no issues at all. It's been cool all day, no strange out of the ordinary things happened at all.
Sent from a noob on a new note

This has been going on for years on Ebay. Fake batteries & fake memory cards from China. Don't know how they get away with it, but I suppose money talks.

Please keep us updated. 5h 19m is my best display time using the Anker battery.

Fake? ie not Samsung? Its a replacement battery, So what as long as they work and do what you want
Sent from a noob on a new note

I am extremely interested so please keep us updated. If we can get an extra hour I would be very happy!

paris.gr said:
I am extremely interested so please keep us updated. If we can get an extra hour I would be very happy!
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Try the Anker battery, im seeing about an extra hour of display time over the stock battery.

That's exactly what I've found with this battery on the first cycle today. I'm hoping that will improve over the next few charge cycles.? We will see
Sent from a noob on a new note

I'm actually quite intrigued to hear about this...my boyfriend uses a non branded battery from China for his Galaxy S2 and he's had no problems with it seems. I think he may have got it from ebay too. Combining that with a rechargeable case he never has to worry about recharging his phone. I hope this one works out well.

numbnutsuk said:
Fake? ie not Samsung? Its a replacement battery, So what as long as they work and do what you want
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When I had my SGS2, I bought a 3,500mAh battery from eBay. It lasted longer, but not as long as I expected.
I tested it with a battery analyzer and sure enough, it was 2,413mAh. I bought another two, those only measured out at about 2,100mAh.
Those high mAh ratings you see on ebay batteries are fake.
http://forum.xda-developers.com/showthread.php?p=17100991#post17100991
http://forum.xda-developers.com/showthread.php?p=18529580#post18529580

Like I stated earlier I've not got a care in the world about any 'fake' statements! @ £10 as long as it does what I want it's win win.
Sent from a noob on a new note

numbnutsuk said:
Fake? ie not Samsung? Its a replacement battery, So what as long as they work and do what you want
Sent from a noob on a new note
Click to expand...
Click to collapse
No fake as in false advertisement! That's not really 3250 or whatever mah. If it was why wouldn't Samsung have made a 3200 or 3500 mah stock size battery? I can get 8 hours and over 5 hours screen on with stock 2500 easy. Usually mine goes all day with 4-8 hours music and 3-5 hours screen and last from 7am to 10pm ... its a scam that battery is maybe 2800 mah if that .....
Sent from my GT-N7000 using Tapatalk

numbnutsuk said:
Like I stated earlier I've not got a care in the world about any 'fake' statements! @ £10 as long as it does what I want it's win win.
Sent from a noob on a new note
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Well, it doesn't do what you think it does. After using it for ~3-4 charges, change back to your stock battery

DOGSofDOOM said:
No fake as in false advertisement! That's not really 3250 or whatever mah. If it was why wouldn't Samsung have made a 3200 or 3500 mah stock size battery? I can get 8 hours and over 5 hours screen on with stock 2500 easy. Usually mine goes all day with 4-8 hours music and 3-5 hours screen and last from 7am to 10pm ... its a scam that battery is maybe 2800 mah if that .....
Sent from my GT-N7000 using Tapatalk
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So you have one of these batteries have you? you've tested it have you? Your the one who's fake. Making unfounded statements you drongo
Sent from a noob on a new note

honf said:
Well, it doesn't do what you think it does. After using it for ~3-4 charges, change back to your stock battery
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Click to collapse
Oh dear, hello on first cycle it'd already beaten my stock battery by an hour display time! Can't you read drongo
Sent from a noob on a new note

anker 1900 battries

hey guyz first of all greetings and sorry for bad english
okay i got my gs2 a couple of month ago and iam enjoying it allot
but i got one proplem okay the battery
it doesnot continue 12 hours with mid use
and the bigger problem its takes 3- 4 hours of charging (really stupid)
so a couple of days i heard about anker 1900 and its great since it adds capacity but without changing the physical size
any way my only 2 questions about it
1-does it harm my phone on longterm in any way
2-charging time (most imp for me )
greetings again

I had the Anker battery for my SGS, and it works the same way as the OEM, if not better lasting.
Charging time is about the same, if not more, because of the higher capacity.
If you guy the two pack with the charger, you can charge two batteries at one time, if it makes things easier.

crap so no changes in charging time :S do u know any other way to fix that ???

Are you charging via USB of AC outlet? AC outlet is a lot faster. But because of the higher capacity, it'll be longer. I personally don't think it's that long, maybe 2-3 hours for a 0-100% charge. Just charge it over night?

You should consider rooting you phone and installing a custom rom and custom kernel. One of the main reasons I did it is to be increase my battery life.
Before I use to go 8 hours max with my battery. Now that I'm on a custom rom with custom kernel I'm doing 15 hours easily.
Besides that there are other benefits too.... So check it out
Sent from my GT-I9100 using xda premium

guyz u really not getting me battery life isnot that imp for me i just want it to chrage faster it takes 3 hours on ac my brothers arc s charges fully in less than an hour

Try looking for another model number charger. I recieved another charger ordered from Samsung, for my SGS2, and it charged way faster than the one I got with the phone.
___________
Sent from my Galaxy Note GT-7000, 2.3.6.
JKay setting, uninstalled TWLauncher. Customized stock.
Fast AND sexy as lightning.
Waiting to KANG it up with stable build.

okay man ur ma savior but i have couple of qs
1-for how much u got it
2-what is its model number
3-how faster i mean normally it takes 3 hours how much does this one take ???

mightyillidan said:
okay man ur ma savior but i have couple of qs
1-for how much u got it
2-what is its model number
3-how faster i mean normally it takes 3 hours how much does this one take ???
Click to expand...
Click to collapse
Well, I will have to check. It's at my grandmothers.. :/ It looks the same, it just cost a bit more. :s I don't know when I will be at my grandmothera again. I know that Hama has a charger, pretty cheap?.. And I bought that for here.. Let me see if I can find it.
___________
Sent from my Galaxy Note GT-7000, 2.3.6.
JKay setting, uninstalled TWLauncher. Customized stock.
Fast AND sexy as lightning.
Waiting to KANG it up with stable build.

mightyillidan said:
okay man ur ma savior but i have couple of qs
1-for how much u got it
2-what is its model number
3-how faster i mean normally it takes 3 hours how much does this one take ???
Click to expand...
Click to collapse
http://www.dustinhome.dk/hama-quick...usb-stromforsyningsadapter/product/5010562250
This one! But I cannot find it outside of Denmark. It charges my phone really fast. Sorry, all I can do right now..
___________
Sent from my Galaxy Note GT-7000, 2.3.6.
JKay setting, uninstalled TWLauncher. Customized stock.
Fast AND sexy as lightning.
Waiting to KANG it up with stable build.

mightyillidan said:
guyz u really not getting me battery life isnot that imp for me i just want it to chrage faster it takes 3 hours on ac my brothers arc s charges fully in less than an hour
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Click to collapse
it might as well charge in 10 minutes, it is a crappy device nonetheless
to answer to your real question
i am using 2 anker batteries since september.
0 problems, and if you get the set with 2 batteries and the charger, it is IMPOSSIBILE that you will ever need anything else than that, since you can simultaneously charge your phone and the spare battery.
And plus...its really cheap
Small advice though, since there has been some bad batch of ankers...before trying to charge them with the phone, try a couple of charges with their dedicated charger, better safe than sorry.

any idea if anker doesnt charge when they battery is in the phone when they are left with a certain percentage? cos both my battery doesnt charge when i fully discharge the battery. only till a certain % it works as normal charging with the battery in phone.