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Message: <blockquote data-quote="helotaxi" data-source="post: 4927868" data-attributes="member: 550915"><p>You need a big enough inverter to power the laptop.  150w is about as small as you can safely go.  I'd get a second battery that is a deep cycle design.  Draining a normal starting battery deeply will destroy it.  You can deeply drain it without damaging it.  I'd keep your starting battery under the hood and put the deep cycle in the trunk.  Separate them with an isolator or solenoid.  That way you can drain the deep cycle and your starting battery will still be good to start the car.</p></blockquote><p></p>

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