Extending Battery Life - Epson 500 Series User Manual

The computer takes approximately 3½ hours to charge a
completely discharged battery pack. If you use the system while
the battery is recharging, is can take up to 6 hours. If the battery
still some charge left when you start charging, the time will be
less.
If you have additional battery packs, it is a good idea to keep them
fully charged so you can use them to replace the battery pack in
your computer when it runs slow. This is especially useful if you
are travelling and will need to run the computer off the battery; an
extra battery pack or two extends the length of time you can
power the computer without the AC adapter.

Extending Battery Life

Rechargeable batteries like the one supplied with your ActionNote
have a charge "memory." If you frequently start to recharge the
battery before it runs out completely, it starts to "remember" this
discharge level. When you use it again, it may stop supplying
power at the same level.
To reduce the memory effect and extend the life of your battery,
you should let it diischarge completely whenever possible before
recharging it. If you use the computer every day, you should
completely discharge the battery at leaset once a week.
Then recharge the battery. Allow the battery to reach full charge
status before interrupting the charging cycle. The charging light
stops blinking and stays on when the battery is fully charged.
If you find that over time the battery is losing its charge sooner,
the life of the battery may reaching its end. Try letting it
discharge completely; then recharge it. If this fails, replace it with a
new battery pack.
Powering the Computer 3-5