3DPrinting

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3DPrinting is a place where makers of all skill levels and walks of life can learn about and discuss 3D printing and development of 3D printed parts and devices.

The r/functionalprint community is now located at: or !functionalprint@fedia.io

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Tired of expensive disposable batteries and rechargeable AA suck. So I made a 10k mAh pack for my deadbolt. (sh.itjust.works)

submitted 1 day ago* (last edited 1 day ago) by ThePantser@sh.itjust.works to c/3dprinting@lemmy.world

186 comments fedilink hide all child comments

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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[–] AnyOldName3@lemmy.world 2 points 10 hours ago (1 children)

The internal resistance is much lower than that of an alkaline, so for some applications, a 1.2V NiMH will match or beat a 1.5V alkaline, but if you really need the extra 0.3V, then they're really pants.

[–] InFerNo@lemmy.ml 4 points 8 hours ago* (last edited 8 hours ago) (1 children)

I bought rechargeable AA lithium batteries. They have a usbc slot on the positive end. Really handy. They do 1.5V.

[–] BlackLaZoR@lemmy.world 1 points 2 hours ago

Ah, portable fire hazard. Love it! :)