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this post was submitted on 07 Aug 2023
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Technology
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Those batteries in your photo are NiMH batteries... which discharge on their own at a fairly rapid rate even if you're not using them at all. They're also pretty big and heavy for the amount of power they provide (which, due to the self-discharge issue, is effectively a lot lower than the official number on the battery).
I strongly recommend investing in devices that use 18650 batteries. They're about the same size/weight as a AA, and they last much longer (both in terms of from full to flat and also the number of years (decades?) of use you'll get from the battery.
A lot of "proprietary" batteries are in fact a bunch of 18650 cells wired together.
It's worth investing in good ones - the quality varies significantly from brand to the next. With a good 18650 cell, you won't be replacing it when the battery expires, you'll be transferring it to a new gadget when the gadget is broken or so old that you decided to buy a new/better model.
@abhibeckert I have those from Eneloop. They do not discharge that fast as the old generation of rechargeable batteries. Yes they do, but the rate is quiet slow.
Same. People used low quality Ni-Mh batteries and got what they paid for. Eneloops have worked great for me. Believe it or not, Duracell has been great too. It’s the energizers that have all been awful for me.