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Most modern electronic devices these days use Lithium-based batteries, which unlike older types of batteries, must be looked-after a very specific way to ensure the maximum usage times and life of your battery...
This guide is here to help you do just that.
Firstly, when you buy your device with a lithium-based battery, you should charge it for a SOLID 24 hours (even if the device says it's fully charged) - this will ensure that you will get the maximum usage times out of your device/battery; try not to use your device during this time.
Once you have done this, you will guarantee the maximum usage times out of your device/battery, however you may have to charge your device/battery 5 or 6 times (as outlined below) before this becomes apparent...
Now, with everyday charging, you should NEVER (I repeat, N-E-V-E-R, E-V-E-R) run your device/battery all the way down and where possible, you should try and keep it above 50%.
HOWEVER, this does NOT mean that you should leave your device/battery on the charger 24/7 - with the exception of the first charge, you should remove your device/battery from the charger once it says 100%, where possible...
Finally, if you are storing/not using your device/battery for an extended period of time (about a month or more), you should charge your device/battery up to 100%, then run it down to 50% and repeat this on a monthly basis, for every month that you are not using or storing the device/battery - this includes if your device is switched off.
If you do these things, not only will you guarantee the maximum possible usage times out of your batteries/device, but you will ensure the long-term life of your batteries... I have known a number of people who look after their batteries correctly to get up to four years before needing to replace their batteries, and even then it's debatable!
This information applies to ALL lithium-based batteries...
Admins, please make this a "sticky"?