Recharging Li-Ion 18650 batteries

[rafletcher]

I've got a "smart charger" that I use for AA and AAA rechargeables - it is ok to use it for 18650 batteries or do I need a specialised charger?

[Kim]

You need a specialised charger.  Completely different voltage, completely different chemistry.

[rafletcher]

Ta, that's what I suspected 

[fuaran]

They are also a bit longer and fatter than AAs, so probably won't fit in your charger anyway.

There is a risk of them catching fire or exploding, so maybe put the charger in a metal tin, and keep an eye on it.

[rafletcher]

Thanks for the advice.

[Bledlow]

When charging Li-ion battery packs I put 'em in a fireplace, just in case.

[Kim]

Top tip: Best to do this when the fire's not lit.

[Ham]

Top tip: Best to do this when the fire's not lit you want to light a fire.

[mattc]

Top tip: Best to do this when the fire's not lit you want to light a fire.

 

Seriously folks, these things are not to be messed around with. If I was allowed I would post some very scary videos taken at $current_job

And if you have 4-or-more in close proximity ... well, best to use someone else's fireplace for that experiment.

[Valiant]

There are some li-on chargers that charge NIMH batteries. Something like the Nitecore D series is great.