Epson 4SLC2-50 - Manual (Page 54)

Recharging the Battery
The battery pack that comes with your ActionNote is rechargeable.
You may need to charge the battery pack before using it for the
first time, and you must charge it when it runs low on power.
Your computer warns you when the battery is low through the
low battery light.
To charge the battery pack, leave it in the computer. Connect the
AC adapter to the computer and to an electrical outlet. As an
alternative, you can connect the optional automobile adapter to
the cigarette lighter in your car. The computer charges the battery
whenever the adapter is attached.
The charging light blinks while the battery is charging. When the
battery is completely charged, the light stays on.
The computer takes approximately 3½ hours to charge a
completely discharged battery pack. If you use the system while
the battery is recharging, it can take up to 6 hours. If the battery
still has 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 low. 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.
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.
Powering the Computer 3-5