So I have two decent “tactical flashlights”.
One has an 18650 battery.
The other has a larger capacity 26650 battery (also 3.7V).
They came with separate chargers. The one for the smaller battery is good. But the 26650 doesn’t fit in it. The one for the 26650 is a horrible things.
So I decided to splash out nearly ten whole British pounds for a charger that will do both, and has a display so I can see wtf is happening when they charge.
So it arrived and I charged the 18650. Peachy.
I have just bought a new 26650 battery - original cell is now lasting no time.
I put the new 26650 into the charger. “No Charge”. Eh?
I put the old 26650 into the charger. “No charge”
I thought there might be a contact issue, so tried spinning the old battery around and it immediately recognised the incorrect polarity. So not a connection issue. WTF?
Messed about for a while and got annoyed. Was going to contact seller to cite faulty item, but last night had the crazy thought to get the meter out.
So the cells are 3.7V nominal. Charger applies upto 4.25V.
New 26650 was showing 4.5V. Ah.
Old 26650 was (bizarrely) showing 4.84V (!)
So that might explain why a charger capable of outputting 4.25V might not want to charge them eh?
Ran the old 26650 in the torch for 30mins and it had dropped to 3.3V. Put it in charger - working fine.
So partly my stupidity, but I am blaming this whole sorry incident squarely on [mention]Mito Man[/mention] as the resident forum torch idiot. Cheers mate.
