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Old 11-29-2011, 07:42 PM   #1
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charging power pack


I built a portable 12v power pack using a agm battery. the +/- wires go from the battery to a toggle switch, then to a cigarette plug.

I currently charge using trickle charger.

Can I use a 110V usb plug for a cell phone, with a usb cable that goes to a usb capable cigarette plug to charge the battery? the circuit is open if I turn the toggle switch on so the incoming current could make it to the battery. Will this work?

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Old 11-29-2011, 07:53 PM   #2
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charging power pack


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Originally Posted by kobbs View Post
I built a portable 12v power pack using a agm battery. the +/- wires go from the battery to a toggle switch, then to a cigarette plug.

I currently charge using trickle charger.

Can I use a 110V usb plug for a cell phone, with a usb cable that goes to a usb capable cigarette plug to charge the battery? the circuit is open if I turn the toggle switch on so the incoming current could make it to the battery. Will this work?
I think what you are trying to do is charge the battery using a cell phone charger. Is that correct?

No. You can't do that. USB is only rated at 5 volts and 1/2 amp, max.

Find the proper charger for your AGM battery.

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