Hot answers tagged charging
51
That recommendation from the seller was true for old batteries, and it seems they still keep saying that to customers!
Nowadays, batteries are often Lithium-Ion or Lithium-Polymer and such batteries (as I have read many times and based on my own experience) would be stronger if you charge them often. The first time charging and ...
30
A computer USB port is often limited to 500ma (milliamperes). The USB charger, on the other hand, is usually able to provide 1000ma, sometimes even more.
Lets take the case where a connected phone uses 200ma. Then, the USB port would have 300ma left to charge while the USB charger would have 800ma left. A typical smart phone battery has a capacity of about ...
20
I don't see how the duration of the charge would relate to whether or not it's harmful to the smartphone. I have never seen any documentation that keeping a phone plugged in perpetually (whether plugged into USB, AC or DC) would cause any harm to the phone itself. An argument could be made that it's harmful to the battery.
Constant charging is not ...
20
All newer phones use Lithium polymer batteries.
Why is it Partially Charged?
To decrease their aging they are intended to be stored at 40% charge. This means when you receive your phone it should be at 40% charge, otherwise they will have aged your battery for you. (you are probably used to the effects of aging, like a 2 year old phone seeming to have very ...
19
Li-ion does not need to be fully charged, as is the case with lead
acid, nor is it desirable to do so. In fact, it is better not to fully
charge, because high voltages stresses the battery. Choosing a lower
voltage threshold, or eliminating the saturation charge altogether,
prolongs battery life but this reduces the runtime. Since the consumer
...
18
No, the battery doesn't care how it got charged in terms of a given charge. It just takes longer when using your PC because it's getting less current from the PC than the AC charger.
Here's a post on android forums which suggests that the current coming from the PC is significantly less than the AC charger. The forum posts list 100mA or 500mA for the PC's ...
17
Tablets have larger batteries than phones and may be unable to sufficiently charge from the half amp limit of a USB port, especially while they are fully on (screen on and full speed processor clock).
Some will barely charge if the screen is off but come with high current 5v "usb-like" wall chargers, others use a higher voltage charger on a custom ...
14
Samsung removed "Stay Awake" from TouchWiz back in the first OTA for the Galaxy S1. Other ROMs like CyanogenMod still have it, and other AOSP based ROMs as well.
Be very careful using any kind of "Stay Awake" options with these devices that have the Super AMOLED screens. I used to use it when developing and testing the apps. I now have a "burn" in the ...
12
As soon and as often as you can. Spending time at any extreme of charge (high or low) can damage lithium batteries. High charge isn't that bad, considering how quickly modern devices will drain away from that state. Spending time at lower charge levels will damage the internal structure of the battery though.
Draining to "0" on the device won't actually ...
12
USB, mini-USB, and micro-USB cables are standardized, the voltage and amperage are the same across all standard compliant USB chargers. As long as the charger is a standard, generic micro-USB charger then it should be alright.
That doesn't make it impossible for a manufacturer to create a non-standard plug that looks like a USB plug, but they're pretty much ...
12
Modern phones use Li-ion and Li-poly batteries. So the battery life is not affected by whether you charge them at 0% or 90%.
It only has a long term effect. Batteries degrade with every charge cycle. A cycle is usually a recharge from below 50%. So charging while the battery capacity is still relatively high has a long term effect of less degradation.
...
12
It's device dependent, if the manufacturer can fit in the circuitry to use the wall charger without the battery then yes you'd be able to do that. Most laptops can run without batteries, I doubt many smartphone does though; phones are primarily designed to be used while on the go, while laptops are more likely to be plugged in.
A safe test is to shutdown ...
12
In fact the charging time depends on two points:
the output current of the adapter or the USB. The output current of the PC is only 0.5a, it may charge slowly than most of the AC adapters (most of the AC Adapters are 1A or more).
the input current and the charging convert rate of the phone. Different phones have different input current due to Limited ...
12
It is not uncommon that rejected/refurbished phones find their way back to the market as "new" ones.
But in my (and at least Al Everett's) experience, batteries are almost always shipped with some charge. I wouldn't worry, as long as there are no other indicators that your device was pre-owned.
10
Some devices use USBMicro, others use USB Mini. Like any device, it depends on the voltage that the device can take. But for the most part, AFAIK, as long as the charger is the same plug type (micro, mini, etc.) then yes it can work.
A lot of the chargers that use USB plugs output the voltage that a standard USB port would (between 4.75 and 5.25 volts). If ...
10
It comes with an AC adapter and a charging/data cable which can plug directly into the tablet, though it does still use their proprietary cable connection since it plugs into the same connector that the keyboard dock uses (the other end is male USB).
Using proprietary charging cables is not unheard of - Samsung and Apple have done this; I don't personally ...
10
once or twice a month a full battery drain and then a 100% charge helps increase the battery life
That is incorrect, a full discharge is never beneficial to LiON battery capacity. The battery life of a LiON battery is dependant mostly on temperature, discharge rate, and age. In fact, low charge state actually is harmful to LiON battery capacity; ...
9
Any Micro USB cable that has the capability of charging your phone does excactly that.
I found a link on USB powering. The source is from 2005 but the issue remains the same.
Some cables do charge your device due to a sufficient power flow through the cable while others don't.
9
I don't know about the N1 in particular, but as far as I know, most (if not all) phones charge via USB so long as the USB port provides enough power. My Motorola Droid and G1 charge via USB. My Nook Color and Motorola Xoom (tablets) do not charge via USB.
However, do note that it is faster to charge with the phone plugged in to a power source instead of a ...
9
I think you answered your own question ;)
Navigation uses a lot of power: it needs constant use of GPS along with reading the map and processing text to speech. Throw in another power-intensive activity like bluetooth or the phone's speaker (or calling, or data, etc), and it's very conceivable that it would drain power faster than it can pull it from a ...
9
Yes, using Tasker.
See "Set Wallpaper" action and "Power" state. It even looks like it'd be rather easy to configure that event.
For your related notes, also see "Airplane Mode" state and %SILENT variable.
9
All phone (wall-type) chargers are voltage sources, i.e. the adapter provides a stable voltage output (5V here) and the device decides how much current to draw. Your charger's specification says it provides a maximum of 2Amps. That means it will sustain its 5V output voltage up to a current of 2A.
The phone's internal charging chip may or may not charge the ...
8
Lithium Ion batteries don't develope "memory" like Nickel Cadnuim batteries, so charging every day regardless of your discharge level will not affect the battery life. If my memory serves me right, because of the way that the batteries are recharged it is less strain on the battery if you don't let it get below 40% but I wouldn't worry too much about it. ...
8
The Samsung Galaxy Tab has a loading current of 2 A, but the USB-Specificication only allows 500 mA for the whole bus.
With this in mind, it should be clearly visible why the SGT isn't charging via USB.
At least that is true for the original Samsung firmware.
If you are able to install custom ROMs you will probably get fast-charge-support, with this ...
8
The outer pins of a standard USB connector are used for power. You could try removing them from your cable, leaving only the inner data pins.
For more info on the pins, see http://pinouts.ru/Slots/USB_pinout.shtml. For more info on battery life, see Does constant charging harm my Android cellphone?
8
Any phone you'll get will draw power from the battery, not directly from the charger. Let's make some assumptions:
Your phone takes 2 hours to charge when off.
Your phone always uses constant power when on.
Your phone drains a full battery in 8 hours.
Charging and discharging is completely linear.
So if you plug your phone in when it's completely ...
8
Short answer:
That's no doubt a software issue, reported across forums after an upgrade to ICS 4.0.x.
Some users reporting this can be found here:
Galaxy s2 charging port problem - xda-developers
Re: ICS 4.0.3 Charging Paused, Voltage Too High an... - Vodafone eForum
Don't know with certainty if you've upgrade the firmware to ICS 4.0 or any other ...
7
Charging from a USB port of a computer is slower than charging using a charger because the voltage and amperage provided by the computer is considerably lower than in the case of using a normal charger, so the mobile is using “slow charge mode”
I don’t know which is the charging speed ration between USB and normal charger in the case of a SGS, but in my ...
7
All devices should stop charging once they're full. However, they might start recharging when the charge drops down to 80-90% depending on the manufacturer.
If I'm rights most batteries should be rated for about 1000 charge cycles before serious degradation occurs. If you charge the phone at night, in the car and at work that would be about one year. After ...
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