It's funny, my son recently got a new cell phone. The gal at the store told him to always run the battery down to dead before charging. I told him this is misinformation. I have always been under the impression with cell phones, the first time you charge it run up a full charge. Then top it off when convenient because these cells like flashlight cells Li-ion , like to be topped off not drained completely. Also , the practice she told him to do will eventually lead to a dead cell phone when he needs it most . It doesnt make sense but he is arguing with me (go figure, a kid arguing with an adult!!)
there is a BALANCE here, the batteries DO get weak at the low end and cut-off early if they are never conditioned on the low end.
there is no reason to and it is harmfull to do this continually, BUT when you first get a "li-ion" aka phone, the battery has been parked, and one full loop around WILL (i said it) improve your total run time before cutoff by a large ammount.
AND
after many shallow uses and months on end, the low end again becomes weakened , and less usefull.
the phones arent even (nessiarily) capable of conditioning the battery, and so therfore , batts are replaced much faster than nesssisary because the battery is not treated right.
its all about the balance, neither direct outright statement of to do , or not to do can be made, its highly dependant on what the battery has been through, and what it is going through.
most of my devices are running on thier FIRST still and i am less tied to a cord than others. and my phone is always on like a landline day and night
get your DMM out and read it.
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