Comment on My charger wouldn't fit D-batteries, so I made an adapter. Printables link, with F3D file, inside
marcos@lemmy.world 1 year ago
There’s supposed to be a heat sensor on the positive contact that you are rendering useless. That said, given the lack of longevity of every nickel battery I’ve tried on the past couple of decades, I don’t think the charger manufacturers take this guideline seriously.
given the lack of longevity of every nickel battery I’ve tried on the past couple of decades
Early Ni-CADs and NIMHs I agree with that assessment. However for low duty cycle applications the 3rd and 4th gen Eneloop type technology NIMHs perform very well for me. I’ve got about 20 operational cells I purchased in 2011 from an original batch of 30.
This isn’t my data, but my anecdotal experience matches this:
If you have issues with longevity you should focus on getting a new charger. Many chargeres over charge the batteries and completely ruins them. Do it once and they are ruined forever and they wont hold charge anymore. Take a look at lygteinfo.dk (don’t worry the site is in English) where he reviews chargers. I can recommend many of the xtar chargeres.
IMALlama@lemmy.world 1 year ago
This is true, but at the default 500 mAh charge rate it seems unlikely that much heat will be generated? Worst case of 100% of input voltage getting converted to heat would be 700mW or so of energy needing to get dissipated per cell.
ChaoticNeutralCzech@feddit.de 1 year ago
Yeah, the big cells can handle that just fine. The charger would overheat first unless a cell is shorted, which only possible with NiMH/NiCd if the charger malfunctions or the battery is physically damaged.
TWeaK@lemm.ee 1 year ago
The charger circuitry should be designed to avoid that issue entirely.
marcos@lemmy.world 1 year ago
It’s not dangerous. It just degrades the batteries.
IMALlama@lemmy.world 1 year ago
If “10,000 mAh” (if they’re half that I’ll be happy) batteries are heating while charging at 500mA odds are they’re not in great shape to begin with.