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Rework a UPS with Massive Capacity

Step 2Tap into the UPS

Tap into the UPS
Since the battery / batteries will not fit into the old case, you'll use the lugs and wire to extend the wires outside the case. In the picture here, I've replaced the spade lugs that previously connected to the gel cells with connectors that I know will mate together and accept #10 wire. It doesn't cost much and it's easier than trial and error, so spend the extra 25 cents.

Drill two holes in the side of the case. The holes only need to be large enough for the wire to pass through. You don't want the connectors to be able to sneak outside the case, to be safe. Make sure there are no sharp spurs or edges around the holes that might cut or damage the insulation. Thread the wires from the inside out, with the connection inside the case as shown.

As noted in the parts list, you'll want to keep the wires short to minimize voltage drop, but long enough that you can place the UPS and batteries comfortably near each other and the device you're powering (computer, stereo, etc.). Lay everything out, including battery box(es) if desired, and clip the wires to an appropriate length.
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Author:Surferdude