High power 18650 Lithium Battery for your flashlight
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cheers mate...hacked open another one ("Sony Fukushima STG" !!!) which come out at 2160 mAH so i guess these are better...could i charge these to 4.2V like you do? thanks again :)
neilus 2 months ago
@neilus yes using a digital 18650 charger and subject to the precautions I advise regarding fire risk. They will come up to 4.2v fairly quickly (2 hours), but they take a few cycles to sustain it.
motorbiking 2 months ago
nice one, cheers mate :) gotta confess im a complete novice with electrics, i got 8 out of my pack (2x4) which said it was 14.8V / 3400mAH but cant for the life of me figure out the amp hour per cell, which ill need to know when it comes to charging...wont i?? any advice much appreciated dood...!
neilus 2 months ago
@neilus Sounds like a fairly old pack.. Here are the sums again.
14.8 / 3.7v = 4 Serial
8 cells / 4 (serial) = 2 Parallel
3400 / 2 parallel = 1700Ah Not great if your mAH number is correct.
motorbiking 2 months ago
Correction: that should be 1700mAh
motorbiking 2 months ago
can you safely assume that if the battery pack was kaput that all the batteries will be completely useless/dead?? cheers!
neilus 3 months ago
@neilus No Definitely not. Its normally just one pair that causes the whole pack to fail. Sometimes nothing more complex than a faulty circuit. Open them check the voltage, charge them and see if they will sustain a charge.
motorbiking 2 months ago