Lithium batteries

[slowworm]

I've been sorting out some torches recently and been wondering about the batteries.

Firstly, with rechargeable lithium batteries, has anyone ever had one overheat or catch fire at all? I've avoided unbranded cheap batteries but never had a problem with a growing list of them, and I don't know anyone who has.

Secondly, with the disposable AA, AAA etc batteries, you get non-rechargeable lithium versions that last much longer than alkaline. Has anyone ever had a problem using these in something? Curious if they can provide too much power to some devices or if they are completely interchangeable as I might get a few packets to live with a couple of emergency torches.

 

[Nice65]

Regarding 3.7v lithium ions, they shouldn’t be discharged below about 2.8v. They’re unlikely to catch fire used singly with a normal draw. Problems arise with high draw situations like vapes or powerful torches, and also if the batteries are being run in series to increase voltage. Then a weak cell can fail to keep up and run hot.

Second question, don’t mix batteries. And never mix voltages applies to all batteries so get a battery tester.

For chargers, look on Fogstsr at the XTAR chargers, they differentiate between lithium ion and NiMh, and provide slow and steady charging with a readout.

 

[Danceswithhelicopters]

I love the lithium non-rechargeables for non-parasitic drain items that you just want to work when you pull them from a drawer or the bottom of a pack. They are expensive, but their 10-year life span is excellent for those purposes.

 

[Potatohead]

Regarding non-rechargeable lithium in AA torches check your voltage range of your torch. The lithiums run at a higher voltage and if your torch only accepts Alkaline/NiMh do not use a lithium as youll cook your emitter.

 

[slowworm]

Regarding non-rechargeable lithium in AA torches check your voltage range of your torch. The lithiums run at a higher voltage and if your torch only accepts Alkaline/NiMh do not use a lithium as youll cook your emitter.

Thanks, that's what I thought but they are listed as 1.5v. Just found some specs and they do seem to output 1.8v when new.

The torches I have in mind don't list voltage other than AA or AAA batteries but I'll not risk it. It also helped me decide as the lithiums were several times the quality alkalines.