“Does this charger have to be recharged?, and can you use a USB? How long does it start fully ready too go,?”
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Hello Yellow, The 4 Amp Battery charger does not have a battery inside and cannot be "recharged". It is good to go and fully ready to use out of the box! Simply plug the device in and plug it into your 12volt battery to get started. USB is not possible as this device is not designed for USB, it is for charging a 12 Volt battery.
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