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It was a genuine question, I have ever used or needed one, therefore I have little to no idea how they operate.
by celticninja 10y ago
It was a genuine question, I have ever used or needed one, therefore I have little to no idea how they operate.
- mrfusion 10y agoIt's just a big battery that you can plug things into full time. When power goes out it instantly switches to battery power. It recharges when the power comes back.