how will i know if my full mech tornado is lowbat?

[kurtcobain13]

thanks!

 

[justinred]

As with all full mech PVs, it does not regulate voltage. You get 4.2 volts output when fully charged and drops till battery gets drained. You just need to "feel" that when you get less vapor or need to pull longer to get a good vape, then it's time to charge your battery.