Various LEDs Indicate charging in development, battery amount, and once the device is in float method. There's a speedy-disconnect harness to modify among the included ring terminals and alligator clips. The very first thing that stood out to us about the Genius PRO50 was the quality of the alligator cables. https://hukums.com/products/stanley-14-in-1-folding-locking-multi-tool-stht0-70695