I have two chargers - one from the pre-smart-charger era which just puts out a steady current at 12 volts and a more modern so-called smart charger.
On the occasions I've had to deal with a totally flat battery the first is the only way to get things going. After a couple of hours you can switch to the other charger and finish the job off.
Why someone can't design a modern charger to wake up a flat battery I've no idea.
Edited by FP on 18/02/2019 at 15:49
|