With my current mobile (samsung N500) I always used the policy of charge until full, then run until flat, then charge until full again etc.
ie, never recharging until it was flat. This is a bit of a throwback to when I used to use nicads a lot about 15 years ago.
the methodology being that if you did it this way the batteries remembered how much charge they were supposed to hold.
however, these new lithium polymer batteries in PDA's aren't supposed to have this issue are they?
On my samsung it's been fine, it's held charge well and never really gotten less, even after a years worth of charging and discharging.
A chap at work does the complete opposite, he puts his on charge whenever he can, whether it's flat or not, and usually before it falls below 80%, his reasoning being that he read somewhere that if you trickle charge it a lot it lasts longer.
as you can see, two conflicting methods of working.
what should I be doing to make my battery last as long and as well as possible