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Adapting cell battery to HP 41
08-04-2020, 10:56 AM (This post was last modified: 08-04-2020 10:56 AM by Hans-Peter.)
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Hans-Peter Offline
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RE: Adapting cell battery to HP 41
Quote:Turns out that LiFePO4 cylindrical cells (3.2 volts each)

Be careful with two LiFePo cells. These have 3.6V per cell at full charge. That would be 7.2V and probably too high to survive.
I have connected two LiFePo4 cells of Soshine AAA size in parallel and added a 5V step-up converter. These have only 2x280mAh but they are suitable for lower temperatures outside.
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RE: Adapting cell battery to HP 41 - cruff - 02-26-2019, 12:45 PM
RE: Adapting cell battery to HP 41 - Hans-Peter - 08-04-2020 10:56 AM



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