Recently the power supply for the charger for my cordless drill failed.
The manufacturer no longet stocks the power supply.
The battery to be charged is 18volt. The battery fits onto a carging cradle (which controls the charging) and a power supply (the faulty one) plugs into the cradle.
The (faulty) power supply is rated at 21 volts dc 1.4A.
I cannot locate a power supply which has an output of 21volts but can find one which outputs at 20 volts and another one which outpits at 24 volts (DC rating mA are ok for both).
Would the one rated at 24 volts be unsuitable? If so what about the one rated at 20 volts (same as nominal voltage of rechargable battery) - the 24 volt one is cheaper than the 20 volt one which is multi voltage but would the voltage be too high?
Both are switch mode type.