I hated taking batteries out of starter box to charge them. I wired up two DPDT (double pole, double throw) switches and some external connectors. Now I can charge the batteries without having to remove them. I soldered a 15A automotive type fuse (the flat bladed style) into each battery wire for safety. This thing works great. (Pictured is a standard starter box that comes with a Hyper7 PCR)
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