Bought this portable charger to jump start my dead battery on my 99 Lexus gs300.. couldn't even detect the battery neither on manual mode. So I had take my battery out of the car and charge it will the wall charger old school.
Definitely won't charge a dead battery. Supposedly it say it will charge it if it has below 2 volts on manual mode and doesn't do that either.
Definitely going to return this junk.

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