Multiple LEDs indicate charging in development, battery amount, and when the unit is in float mode. There is a fast-disconnect harness to modify among the bundled ring terminals and alligator clips. Even so, this charger is a bit less costly than the GENIUS10, so in the event you’re looking at https://hukums.com/products/groz-5-kg-portable-manually-operated-grease-pump-bucket-gs5