Just bought one of these
12vdc, an input current of 300mA max and a battery described as 3.6v 1.5Ah SLA.
I assume the SLA means Sealed Lead Acid?
It also mentions an approx charging time of 10 hours, and specifically warns against charging for more than 10 hours.
Am I OK to opportunity charge this, or do I have to wait until it almost discharges like a drill driver?