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Tired of expensive disposable batteries and rechargeable AA suck. So I made a 10k mAh pack for my deadbolt. (thelemmy.club)
submitted 1 week ago* by to c/3dprinting@lemmy.world
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Eneloops would only last about 3 weeks. And disposable last 2 months. This door is used a lot and since it has Zwave and a door open sensor it sends info on every open.

Bonus, since it can handle the lipo AA batteries that put out 1.8v and it gives the motor more oomph I made the battery pack give 7.2v and it never sticks anymore.

This is a garage-door so its not critical access but is used a lot.

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[–] 4 points 1 week ago (2 children)

30+% failure rate every recharge cycle

What is considered a "failure" in this context?

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  • [–] 1 point 1 week ago (1 child)

    The battery no longer recharges and is effectively trash.

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  • [–] 5 points 1 week ago

    That's just terrible to hear. My oldest Eneloops are going on a decade with no failures, but I also had fairly good luck when I used to buy cheaper rechargeables. The common thing might be only using slow chargers.

    Nobody else has brought this up, but I've read that counterfeit Eneloops are a thing.

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