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What do you mean I don't have a NiMh battery? I have a box full of 4/3 4500 mAh batteries with tabs that I bought at auction. I solder them together as needed when I do projects. I have them bolted into a plastic tray. I don't know where you got the 20KW number from, I have soldered the cells together in series of 11, and I have three of these in series. I use that configuration whenever I need to replicate car voltage. I use them to power a small inverter, a little fridge/warmer, a Dewalt battery charger, and a set of computer speakers. I make them all the time, the source is my workbench. I don't worry about monitoring the individual cells because I don't really care that much. If the pack goes bad early I'll take it apart and sweat together some new cells. My wife watched two movies last week when the power went out, using those batteries to power the TV in her sewing room.
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