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Has anyone tried these battery packs ?
11-03-2015, 01:51 AM (This post was last modified: 11-03-2015 01:53 AM by BobVA.)
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RE: Has anyone tried these battery packs ?
If you use low self discharge NiMh they'll sit for months and still work OK. These are typically sold as "pre-charged" re-chargeables at the consumer level.

I haven't found them available as flat-top, but you can use button tops if you make your own "shell" out of heat shrink - I had a local battery shop make me up a 3 AA pack (welded connections) and heat shrink it, then I attached some DIY copper connectors. Don't try to solder directly to the batteries - it's dangerous and wrecks the cells.

Katie shared this idea awhile back and it works great: modify a 3xAAA cell holder to make appropriate contact with the battery connectors in the calculator, then load it with low self discharge AAA batteries.
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RE: Has anyone tried these battery packs ? - BobVA - 11-03-2015 01:51 AM

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