IBM RT-686 Laptop User Manual


 
Useful Information
10
Note: Battery characteristic varies depending on factors such as ambient
temperature, charging method, load current, aging, etc.
For example, at low temperature the chemicals of the battery are more
inactive, thus decreases the output power.
The battery gauge can only be taken as a reference. Please do not expect
it to show the exact amount of the power remaining.
There is no memory effect on Lithium Ion battery cells. However,
discharge the battery to nearly empty every 2~3 months would help the
internal gauge to reset its readings.
Charging the Battery
Plug in AC adapter starts the battery charge. If the battery is already full, the
sense circuitry will stop high current charge within several minutes.
There are two LED indicators next to power indicator for Primary and Secondary
battery respectively. Indicator turns ON when the battery is charging. They will
turn OFF when the battery charge is completed.
To charge the Secondary Battery, simply install it into the computer and attach
the AC adapter. The internal charger will charge the Primary and Secondary
batteries at the same time.
Optional Dual Battery Charger can charge Primary and Secondary batteries
externally.
Boot Up and POST
The computer turns ON and loads the operating system (such as Windows) into
the system memory. This start-up procedure is called “boot up”.