Develop Bugs

Difference in charging with craddle and the adaptor?

I want to know what is the difference of charging using the cradle and charging using the adaptor. Which will full charge the battery faster? Which is advisable for frequent use?
I belive USB porst can only supply more or less 300 mA and as stated in the adaptor it can provide upto 2A. I want to know what is the effects on the different ampere rating and how the XDA manage it? Also want to know if the XDA have a over charging protection circuit and where is it located (at the unit or at the battery).

unless you connect the psu to your cradle
then the 12volt 500mA that the usb port can give
will mean it takes a longer time to charge
but you can just connect the psu to the cradle and it's the same

cradle vs power supply
Power supply charges the battery faster than cradle, but does it have an effect on the battery life? which is better to use to prolong battery life, the cradle or the power supply? Or may it is just the same?

My Alpine has a Lithium Ion battery - Li-ions don't suffer from the same 'memory effect' which NiCads and NiMHs do, so don't worry about having to full discharge the battery every time, or charge the battery up to a full charge when you first get it - just plug it in and go, to be honest.
I can't see any reason for a variation in input voltage or current having any discernable effect on the life of the battery, it'll just take a little bit longer to charge, that's all (when the battery starts to get full, the voltage drops right down and the unit 'trickle charges' the battery anyway, so slightly less current won't matter anyway).

[Q] Battery Charging Time

Hi all,
I know that on older phones the battery had to be emptied almost to 0% and the charge it to full. This was done for battery health or something?! Is the true for newer batteries?
Anyway I plan on buying a desktop dock, and i was wondering if it would damage my battery if i charge it when ever i can for random periods of time. Would this decrease my battery life time or in anyway damage it?

I think with this type of batteries you don't need to completely discharge and then recharge. In fact, that may harm the battery.
It's better to charge the battery whenever possible

yep ljesh is right
with lithium batteries that is not the case, i forget what the old batteries were called, but i think they began with a N..

You can't completely discharge these with normal usage since they have in-built lower end limits for protection.
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- HTC Desire via XDA App -

You're talking about the memory effect.
The battery used in the Desire (Li-Ion/Li-Poly) does not have such a memory effect. (older did, like Ni-MH, Ni-Cd) So no, you don't have to and you shouldn't deeply discharge this type of battery.
Recharge it as soon as possible, as few as possible and let it charge till it's full without interrupting if possible.
Sometimes you'll read that you have to 'calibrate' the battery. You don't calibrate the battery, rather the charging controller, which estimates the battery capacity. Over the time this estimation can get wrong, thus you have to calibrate the controller by discharging the battery till it's empty and charging it till it's full (some do a few other tricks, too, however, it's only interesting if you have root). If you have issues with your battery (like shut-down at 10% or higher already) then consider such a calibration.

I have noticed that compared to my iPhone 4 charging the desire takes ages. Could it be because I am using a 3rd party wall charger?
Sent from my HTC Desire using XDA App

ste1164 said:
I have noticed that compared to my iPhone 4 charging the desire takes ages. Could it be because I am using a 3rd party wall charger?
Click to expand...
Click to collapse
yes!
The Desire can charge in two modes:
USB mode: Low current, can get charged from a normal 500mA USB port. Takes long
AC mode: High current, charges with 1A, only compatible AC adapters should be used.
How can the Desire detect what mode it can use:
If the Data+ and Data- lines in the USB cable are bridged, then it switches to AC mode, else it thinks it's connected to a USB hub or a device with max output of 0.5A.
So either get a AC Adapter which has those pins bridged, or modify a cable, or buy a USB cable which has those pins bridged already (don't know it exactly, but I think I've read that such a cable gets supplied by some HTC car adapter, but I don't know it for sure)
Just search about this topic, you'll find a lot of posts about it.

Thank you I will look for a proper chargeing cable.
Sent from my HTC Desire using XDA App

Yea this charger only outputs 500 mAh ill need to look for a better one.
Sent from my HTC Desire using XDA App

Thanks for all your replies

P600 charging question

I picked up an Anker astro 2nd gen 3 external power pack/charger. It is a 10,000mah power pack. When I plug my note 10.1 to the wall charger it charges at around 1200 mAh. The power pack is capable of delivering 2400 mAh. When I used the power pack it never delivered more than 970 mAh. Is this some restriction on the tablet side or is this an issue I should be addressing to Anker?
Sent from my SAMSUNG-SM-N900A using Tapatalk

What exactly are you trying to achieve here? Faster charge times?
Stock charger is a 2 Amp, and I've seen no difference in charging times with other 2A chargers I own either.
Sent from behind your couch while chillin with the Boogeyman!

It should be putting out more than that. I bought one myself last week and when you first plug it in the app I use shows approx 700-800mA but if you leave it screen off for a couple of minutes then check again you will see currents of approx 1300 -1600mA being drawn. I did a test from full battery and empty note 10.1 P605 it took 4hrs 50mins to fully charge the tablet which is a good indication of everything being as it should.

I will try it on my phone. If the output is low on that also then I will believe there is something wrong with the power pack. Not trying to get faster charge times. Trying to get normal charge times.

Zenfone 2 won't charge beyond 85% while charging via Power Bank

My phone is Asus Zenfone 2 (2GB) It.s charger's specifications are - 5.2V , 1.35A. and battery - Li-Po 3000 mAh battery. When charging via the charger, it gets 100% charged.
I recently purchased Ambrane 13000mAH, P1310, Li-Po battery Power Bank with 5 V, 2.1A and 1A output ports.
When charging my Zenfone 2 via Power Bank, the charging stops sharp at 85%. Initially I thought the Power Bank might be faulty, so I drained my phone's battery to 20% and connected it to the 2.1A port again. And surprisingly it charged my phone again to 85% where again it stopped charging.
Now the functionality of the PowerBank says, when the phone is 100% charged, the PowerBank would wait for few seconds and then will automatically shut down (auto disconnect feature). So, I think at 85% my phone signals the Power Bank, that it is fully charged, and now it should stop charging it any further. However, this is just a lame assumption. But neither do I know what changes in the settings do I need to make nor do I know how to get out of this.
A thought - Can the PowerBank be faulty ? ( 1 time charged Power Bank charged my phone 2+ times to 85%, the 3rd time it reached 65%)

You may need to test with a 2nd phone. We do know that charging the phone does slow down once it hits certain levels, but I've never had an issue with the ZenPower not charging the phone all the way.

after unlocking bootloader and flashing custom rom teameos rom my charger that came with zenfone 2 doesnt work but my trusty old samsung galaxy s3 charger works fine in it not a major loss didnt even use the proper charger much anyways as the cable isnt long enough to reach to my desk or bed and my sammy one is so dont know if its just my phone being weird with it or its the unlocking bootloader custom rom flash thats caused it

Howto check Battery Status (replacing or not ?)

Hi Guys,
I am planning to use my Nexus 5X for home use only (without SIM and rooted) and want to check if Battery is good or bad (for replacement).
I dont trust that much Battery apps on play store (I Dont know what theyre doing).
So some experts here who knows when battery is bad or not (maybe voltage or something) ?
Info:
I dont have any professional electric measurement stuff or anything like that
Nexus 5x is on newest Firmware (non rooted / custom)
Battery seems ok from outside - no expanding or anything else negative
Hope, somebody can help.

nobody ?

I agree with you that the battery capacity from an App probably isn't very reliable. What I do to really test the battery is the following. On Ebay I bought this USB tester which not only shows Voltage and Current but it can track the current over time, integrate it and show the total amount of mAhrs drawn.
First, your phone's battery needs to be empty. I just use the phone until it powers itself off. Obviously this goes faster if you keep the phone active. Then when the phone has shut itself down, charge it through the USB tester. There's a button on the tester to reset it to 0000 mAhrs. Then let the phone charge. Since the USB tester is USB and not USB-C you will have to use a USB charger (pick one that can deliver 2 A or more) and a standard USB to USB-C cable. Charging may take a couple of hours. When the current on the tester shows a low value the phone is charged and you can read the capacity that was charged.
It is possible that the actual capacity of the battery is slightly larger than the value measured by the USB tester. That will be the case if the phone's charging circuit uses a switching charging regulator because then it will be able to convert the 5 V charging voltage to the 4.2 V battery voltage almost without losses and that would mean a slightly higher current at the battery. I am unsure if the Nexus 5X has such a switching charging regulator, probably it does as it would get quite hot if it didn't especially while it is fast charging.
The Nexus 5 devices I have access to measure at around 2100 mAh. If your value is close to that then the battery isn't worn out more than average.

Yep you right, didnt think about to "monitor" electrical charge from USB directly... Thanks
I know reading electrical charge out from USB dont show the exact amount of power... I mean you have power loss from the USB resistors (I think)
A friend of mine told me also: I have to test more then one "USB testers" - reason: some (not all) passthrough the quick charge signal properly -> phone charging fall back to USB charge on 500mv -> more tollerance from USB tester (If I dont misunderstood)

The USB method will always have some error. But "some (not all) passthrough the quick charge signal properly" isn't relevant, if that is the case then the phone will simply charge slower. Also the Nexus 5 can only use 5V as the USB voltage, it doesn't support 9 V or 12 V Quickcharging at all.
How accurate the USB method is depends on how the phone is designed and how you charge it. When the phone is active (switched on) it will consume some power which is added to the measurement. So I switch my phone off when testing it. Then always some energy is lost in the charging circuit. It depends on how it is implemented.
To really accurately measure the battery capacity you'd have to disconnect it from the phone and connect it to a charger (or discharger) that can measure battery capacity. But then there's the issue of what voltages to use as "empty" and "full" voltage. If you'd charge the battery to 4.3 V you get a bit more capacity but it stresses the battery more resulting in a shorter lifetime. That's why 4.1 V or 4.2 V are more commonly used as the "full" voltage. It is similar with the "empty" voltage, lower gives more capacity at the cost of stress on the battery.
All in all, battery capacity can only be measured accurately under strict and well defined conditions. But for a rough indication the USB method works well.

OK understand.
Is there any percentage, voltage or other value on liion batterys to identy it as "dead" ? I mean a "common" value to identy dead liion batterys or do they differ ?