They do … 1.2v output is low compared to the 1.5v alkaline … they lose charge as they sit there doing nothing unless Enerloop which is expensive and still 1.2v - I recently converted the wife’s led candles (2 x AA) each to 2 18650 each and now I don’t have to charge the things for 15 or so weeks. This guy knows.
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.
The range is actually 1.4-0.9v with drop only at the end of the discharge cycle. Much better than regular AA that drops voltage proportionally to the discharge level. Also more amps than alkaline and no leakage.
Self discharge is a thing and putting it in clock or led candle is just doing it wrong. Use alkaline for these use cases.
Zedd_Prophecy@lemmy.world 6 days ago
They do … 1.2v output is low compared to the 1.5v alkaline … they lose charge as they sit there doing nothing unless Enerloop which is expensive and still 1.2v - I recently converted the wife’s led candles (2 x AA) each to 2 18650 each and now I don’t have to charge the things for 15 or so weeks. This guy knows.
AnyOldName3@lemmy.world 6 days ago
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 6 days ago
I bought rechargeable AA lithium batteries. They have a usbc slot on the positive end. Really handy.
BlackLaZoR@lemmy.world 6 days ago
Ah, portable fire hazard. Love it! :)
chronicledmonocle@lemmy.world 6 days ago
That’s only relevant for NiMH batts. If you use Lithium rechargeables, their curve is flat around 1.4V until they’re close to dead.
BlackLaZoR@lemmy.world 6 days ago
The range is actually 1.4-0.9v with drop only at the end of the discharge cycle. Much better than regular AA that drops voltage proportionally to the discharge level. Also more amps than alkaline and no leakage.
Self discharge is a thing and putting it in clock or led candle is just doing it wrong. Use alkaline for these use cases.