Now yes kobalt minen it depends on how you're using it. But the Apple creators say it will play movies solidly for 10 hours for example before the iPad battery says "feed me".
The battery will over-charge if left attached to the charger. The battery stops charging automatically when full lithium facts so it will not over charge. If the battery is left on charge too long it is possible that heat will damage the battery.
2) Battery freshness: often overlooked. Always make sure you have the freshest battery possible. A battery can lose it's ability to hold a charge as time goes on. You want batteries that move off of shelves quickly to be sure they aren't old.
Step 2 - Turn off your iPod and set the hold button to the on position. Take a flathead screwdriver, as thin as possible but oftentimes the retail store that sends you the battery will give you a tool. In any case you must open up the unit by lithium bettery stock putting the tool or screwdriver between the plastic and the metal. Once you sense a clip, pry it ever so gently. Continue around the iPod, opening each latch.
Li-ion cells have a good peak output current and low source resistance. When you overload the tool, the voltage stays up, and they just keep pumping current into the motor. Power tools have thermal overload trips in the motors, and that's a good thing with Li-ion batteries, if they didn't they'd just burn the motor out!
For jobs where the batteries are required to be light weight as well as being reusable, then lithium batteries are ideal. But if a battery is needed to be very reliable or to remain unused for a long time then they might not be the right batteries for it.