I've seen some USB rechargeable AA/AAA NiMh batteries being sold before in foreign online stores (I think they are NiMh, because they are not 1.5v constant voltage like those 1.5v Li-Ion AA batteries with a constant voltage), but since they cannot be shipped to my country anyway, I didn't bother them.
But recently I notice a few local online stores (that can ship locally) are offering "Smartoools" AA / AAA NiMh USB rechargeable batteries. I understand these are probably not that good (the feedbacks on the local online store for the item, only mention they work, but so far none seem to have capacity test equipment). I'll try to get a few when there's a sale event (I don't have a specific need for these batteries at this time, though I'd like to check them out).
I'm curious if anyone has tried these "Smartoools" (or other brand) AA / AAA NiMh USB rechargeable batteries? They cost around US$12 for a pack of 4pcs (that seems a bit cheaper than Eneloop/Fujitsu here, so I suspect the quality likely will not be that good. Anyone with comments?
They look like these ones below:
https://www.amazon.com/Smartoools-Rechargeable-Micro-Battery-Pack/dp/B01GGCJQAK
https://www.amazon.com/Smartoools-4-Piece-Micro-USB-Rechargeable-Charging/dp/B01K9RH0TM
Claimed capacity is ~1000mAh for the AA and ~450mAh for the AAA.
But any idea if they will work on AA/AAA flashlights that use 1-2 Amps when on max brightness?
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side comment: I purchased a Vapcell P1418 1.5v AA Li-ion battery. And was trying it out on a few AA/14500 flashlights.
I notice that it seems to have a cut-off at around 2Amps. So the AA/14500 flashlights that have a Turbo that use higher than 2Amp, this Vapcell P1418 will shut off (at first, I'm not sure why it works on Max brightness for some AA/14500 flashlights but not on others -- so I tested the tailcap current when switch to Max brightness and notice several that go over 2 Amps, which cuts off the power of the P1418 AA 1.5v Li-Ion battery...