Question about NEC MobilePro 900 Handheld

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Coin cell backup battery

Is the coin cell backup battery rechargeable?

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Re: Coin cell backup battery

No the coin cell backup battery is not rechargeable. If the MobilePro 900 back up battery is low it should be replaced. The battery is a CR2032 coin-cell battery, which is very common and can be purchased at most department and drug stores. Refer to section 1-7 of the “MobilePro 900 Handheld PC’s User’s Guide” for detailed replacement instructions.

Posted on Sep 14, 2005

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Yes the battery can be replaced but this will require you to dissasemble the pda. The problem you face is a clear sign that this battery has failed. There has always been a problem with hp's battery measurement algorithm regarding that secondary backup battery. Altrough it is empty or even if you remove it, the program will still display a full bar. In order to change this battery you will need to remove the screws from the back of your unit. The casing will come off pretty easy. The back-up cell is a small coin like battery most probably wrapped in a green plastic shel. you should find a similar battery and connect the pins from the old one to the new. The battery size is not critical as long as you can make it to fit in the space inside. Try, however, not to use a very small battery because it will drain much faster then larger ones. Carefull when observing polarity.
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