On 16/12/2020 11:48, Marland wrote:

Some if they are off a building site or a repairman who is attending
several calls may be taking the opportunity to top up the batteries of
Cordless tools ,most of the well known tool makes like Makita make chargers
that work off the vehicle accessory socket.

GH

I had an aux battery and charging relay to power an inverter for power
tools etc.

Bill