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I have a MVP 12V 400 amp jumpstarter. When I plug in the power adaptor for recharging, it makes a high pitch noise. Also when I press test it make a high pitch noise. Is it safe to recharge it while it is making this noise?
I also have same problem. When I plugged in MVP 12V 400 Amp jump starter, charging light blinks but I can hear high pitch noise. I even tried to charge from car and same noise. I noticed that my charges gets warm too. What could be the problem? any help is appreciated?
I also have same problem with with my MVP 12v 400 amp jump starter. I even tried charging from Car adapter with same noise problem. I noticed that my charger gets quite hot during the charging? Any help is much appreciated. Thanks,