Which light do you mean? The light on the top of the charger where its flat? Or the one by the list of different functions? Is it ok to charge the battary on the repeak setting for quick charge? The manual said it was for right before a race only but then the little "quick start" paper that it came with said that you use the repeak setting for a quick charge. The other charge modes are super slow, like a trickle charge and I dont want a charger where your only supposed to use the trickle charge. The only battary that I've charged on it was my little 4 cell pack and after a while it did two beeps and then it switched from VESC charge to slow charge. I thought that meant it was done charging so I took it off. Was that the wrong time to take it off? One more thing, can you charge a Nimh pack on the quick charge setting? Thanks!