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100% - get a jump box. Something that plugs in can only help you when you are near an outlet. A jump box can help you no matter where you are. You can connect them and then plug them in to use them as a trickle charger or use them stand alone in the middle of no where.
They also double as back up power to charge phones and tablets when you have a power outage or emergency or just camping.
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2015 X5 XDrive 35i - 2004 Z4 3.0 Sport
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