this post was submitted on 06 Jan 2024
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While looking for uses for old disposable AA batteries, I ran across the Batteriser from 2015. Clearly, it was a flop of some sort, as I am posting in 2024. What happened? Are there any iterations that do work?

https://money.cnn.com/2015/06/02/technology/make-battery-last-longer-batteriser/index.html

https://en.m.wikipedia.org/wiki/Batteroo_Boost

Also, are there any uses for old batteries?

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[โ€“] hinterlufer 1 points 10 months ago

There are, but to use them as a replacement for NiMH/Alkaline cells, they need voltage conversion and typically have a built in charging circuit so you can charge then via USB-C for example. Theyre expensive, have a similar capacity compared to NiMH and can't be charged in a regular battery charger.

On an other note, there are 1.5V lithium batteries (non-rechargable). They supposedly have a higher capacity and last longer.

And then there are 14500 Li-Ion cells that are about the size of an AA cell but run at 3.6V.