How can I open the trunk without draining battery?

I went camping and attached Napier Sportz Tent to it. I opened the trunk for a couple nights and it drained the battery completely.

Thank you

 

I trust your ignition was off and this was just light bulbs draining the battery.
Shut off the interior lights. Either by switch, if it has one, or taping the button sensor closed, or pulling the light bulb out.

You should invest in a solar battery charger. They have to be connected to your battery (they just clip on with spring clamps like jumper cables) as the accessory plug is not active when the ignition is off. You can find them on Amazon, Auto Anything or even Home Depot online for under $40.

 

Yes the ignition was off and I turned off the interior light (in the trunk) off. I caught me by surprise. Is there any central switch that would turn all the lights off?

 

Not that I am aware of. You could disconnect the negative battery terminal. I think it takes a 10mm wrench. Or get a solar battery maintainer as mentioned previously.