Charging a Lithium-ion Battery

Many people don't know about how an Li-ion battery is supposed to be charged.  This should be made as a sticky.  

Here's some great information from another forum:

http://en.wikipedia.org/wiki/Lithium_ion_battery

http://www.cellpower.com/FAQs.cfm

 
Like many rechargeable batteries, lithium-ion batteries should be charged early and often. However, if they are not used for a long time, they should be brought to a charge level of around 40%–60%.

Lithium-ion batteries should not be frequently fully discharged and recharged ("deep-cycled"), but this may be necessary after about every 30th recharge to recalibrate any electronic charge monitor (e.g. a battery meter). This allows the monitoring electronics to more accurately estimate battery charge.[27] This has nothing to do with the memory effect.

Li-ion batteries should never be depleted to below their minimum voltage, 2.4 V to 3.0 V per cell.

Li-ion batteries should be kept cool. Ideally they are stored in a refrigerator. Aging will take its toll much faster at high temperatures. The high temperatures found in cars cause lithium-ion batteries to degrade rapidly.

Li-ion batteries should not be frozen [50] (most lithium-ion battery electrolytes freeze at approximately −40 °C; however, this is much colder than the lowest temperature reached by household freezers).

Li-ion batteries should be bought only when needed, because the aging process begins as soon as the battery is manufactured.[27]

When using a notebook computer running from fixed line power over extended periods, consider removing the battery[51] and storing it in a cool place so that it is not affected by the heat produced by the computer.
  

AKA discharging and recharging them will damage them. Keep it charged up 100% as often as you can. They do NOT suffer from memory effects. Research before you lsiten to these people about how to "train"your battery .Their is no way to "train" the battery becasue its programed to do one thing. Hold a charge. Just keep it charged follow the other options to keep battery usage down and you will be fine. PDA phones suck ALOT of power so get used to it.

Yea good find....

Actually most information says to "condition" your battery by charging it fully, then running it down till the phone tells you to recharge.  Do this for 2 or 3 cycles to insure you're getting most from your battery.  After that it doesn't matter when you charge it, just be sure you charge it fully when you do.