Re: How do you decide that the battery needs charging?
 

i need to charge my phone when i start getting the empty battery beeping... the lowest green level on the desktop indicator might last 5 min as it may last 2 hours... it depends on the usage at the time... its "proportional" to the use u make of ur phone...

Re: How do you decide that the battery needs charging?
 

Nightly charging is probably best, unless you need to sooner with heavy use. Don't discharge more than necessary, as it is not required with Li-Ion (and could possibly be detrimental). I personally have yet to get a low battery indication - even with battery.charge_level.percentage at 1% and battery.reporting.current in the low double digits (although this was in the first few drain/charge cycles so calibration was probably somewhat off).