Tim Green
Established Member
Ref guarantee, if for any reason your main battery fails you can be sure that MG will do all they can to avoid paying for a new main battery. If they suss out you have used a non-standard charger you may have to prove that it is ok. Why take the risk? As an electronics engineer I do understand volts/amps etc but also the many differences in switch-mode power supplies which can affect performance of any system connected.