When is it time to re-charge?

[Gopherfan]

I purchased and married 2 pair of Efest 26650 batteries (by writing a1,a2 and b1,b2 on them) for my new 26650 bcboxmod wired in parallel,with an added voltmeter. I heard somewhere that you are not supposed to let the batteries drop below 3 volts before charging. Is this true?

 

[Manimal3497]

3.2 is the lowest you should go with each battery. I usually try to charge them by the time they hit 3.4 or 3.5

 

[Gopherfan]

Thanks

 

[Slurp812]

The real question is will you know the voltage? Or you gotta pull them out to measure? Once the voltage drops off, you'll probably notice.

 

[Gopherfan]

There's a voltmeter added on the mod