I'm curious as to what recommendations can be made concerning charging routines for a typical lithium ion battery found in a device like a cell phone. The primary goal I have is to maintain the usable life of the battery for as long as possible. In my mind a battery is still usable if it can hold a charge for at least a day under minimal/mild use, such as a few short phone calls and/or text message each day. For the confines of this question I'm sticking with the cell phone's default charger and default hardware/software.
Things I'm looking to be answered would be:
- Should I try to keep the battery at "full charge" (as determined by the manufacturer) as much as possible? Or should I try to cycle the power from full to nearly empty before recharging?
- Should charging be performed routinely (i.e. every night before going to bed), or should I let the battery charge indicator determine my charging patterns?
- My phone in particular has a message pop-up saying that I should disconnect my phone from the charger to "conserve energy". Should I follow that advice and allow the phone to use the battery, or should I try to leave the phone plugged in until I want to leave for somewhere?
- What's the reasoning behind your answer? And I suppose most importantly how much does it matter with Li-ion batteries (i.e. how much more life can I expect using a good practice vs. a bad one)?