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Comment on My charger wouldn't fit D-batteries, so I made an adapter. Printables link, with F3D file, inside

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.

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IMALlama@lemmy.world ⁨11⁩ ⁨months⁩ 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.

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- ChaoticNeutralCzech@feddit.de ⁨11⁩ ⁨months⁩ 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.
  
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  - TWeaK@lemm.ee ⁨11⁩ ⁨months⁩ ago
    The charger circuitry should be designed to avoid that issue entirely.
    
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- marcos@lemmy.world ⁨11⁩ ⁨months⁩ ago
  It’s not dangerous. It just degrades the batteries.
  
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  - IMALlama@lemmy.world ⁨11⁩ ⁨months⁩ 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.
    
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partial_accumen@lemmy.world ⁨11⁩ ⁨months⁩ ago

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:

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TDCN@feddit.dk ⁨11⁩ ⁨months⁩ ago
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.

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