Is there a battery powered inverter that exists?

I'm looking for something like a regular car inverter for my AC appliances... a lamp, laptop, radio, etc... But is there something like an inverter that can be plugged into the wall at night, charged up like a laptop battery, then removed and placed where you need it? Basically a battery powered inverter. Or... show more I'm looking for something like a regular car inverter for my AC appliances... a lamp, laptop, radio, etc...

But is there something like an inverter that can be plugged into the wall at night, charged up like a laptop battery, then removed and placed where you need it? Basically a battery powered inverter. Or if anyone knows how I could somehow hook up several laptop batteries to an inverter and make my own.

Thanks!
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