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Failed NIMH Batteries?
12-20-2016, 05:57 PM (This post was last modified: 12-20-2016 05:58 PM by smp.)
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Failed NIMH Batteries?
Hello all,

I went to use my HP-41 today and the display did not come on. Hmmm, I've had my NIMH rechargeable batteries in since the summer, so maybe they're run down? I never got a battery warning, that I can remember, but maybe they avalanche quickly.

I put in my normal backup alkaline batteries, and the calculator came on as normal.

The fun starts when I go to recharge the NIMH batteries. My BC-700 shows two of the batteries charging and two of them show up as NULL.

The manual says this will occur if I install damaged batteries into the BC-700.

Hey! I just purchased these batteries back in August! I charged them up, and they've been in the calculator since then. How can they be damaged?!

So, I am currently charging my two batteries that show up as OK. Once they're charged, what then? Has anyone had brand new NIMH batteries simply fail like this? Can I put all 4 batteries back into the calculator and hope to get a bit of life back into the 2 dead ones, and then maybe they'll take a charge? Am I doomed to purchase more batteries?

Any advice would be appreciated.

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Messages In This Thread
Failed NIMH Batteries? - smp - 12-20-2016 05:57 PM
RE: Failed NIMH Batteries? - everettr - 12-20-2016, 06:28 PM
RE: Failed NIMH Batteries? - hth - 12-20-2016, 06:51 PM
RE: Failed NIMH Batteries? - smp - 12-20-2016, 08:19 PM
RE: Failed NIMH Batteries? - smp - 12-20-2016, 09:00 PM

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