The battery gauge inside the Extras drawer displays the remaining capacity of all the Newton MessagePad's batteries. When the batteries are exhausted, the battery gauge's display bar will disappear and you will see a warning message on MessagePad's display.
The battery gauge reports the combined status of both the Booster Pack batteries and Newton's internal battery pack. When you see the low battery warning message, you must:
* Change all eight Booster Pack batteries
and
* Either remove the internal battery pack or replace its batteries.
You do not need the internal battery pack in the Newton MessagePad while you are using the Battery Booster Pack. If your MessagePad has alkaline batteries in its battery pack, Newton will draw power from its internal battery pack and from the Booster Pack.
Note: Do NOT attach a Battery Booster Pack to a MessagePad that contains a rechargeable internal battery pack, since this will shorten the life of the Booster Pack Batteries.