IBM RT-686 User Manual download pdf (Page 19)

Useful Information

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”.

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IBM RT-686 User Manual Page 19