Electronics > Repair

Battery replacement HP 8901B

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Crambone:
The 2.8v battery in the HP 8901B is said to be, “Non Volatile Memory” it is a 4331DE number battery.
Question is can I replace without jumping in a power source and just remove old and replace with new?

Tony_G:
I'm pretty sure that there is nothing held in RAM that relates to calibration data (i.e. the RAM is just working memory) - The service manual doesn't mention anything more than just disposing of the battery correctly - I've had my 8901 for almost a decade and haven't experienced any issue with the battery (it is only used I believe when the power drops to the unit).

TonyG

TheDefpom:
I did a couple of repair videos on the 8901B, I have included them below in case they are of help to you, I don't think I showed the battery replacement in them though.

Part 1:


Part 2:

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