He was probably talking about the battery charger the little box with the light. Which comes my next question. Which is probably a stupid on because it's a battery charger. But is there any voltage regulation going on inside there. I don't see anything in the description about it. Seems like a good option though. It's good that some got some things together for the light system. It can be a nightmare trying to understand electrical and trying to find compatible partsWas there one in particular you were referring too...That link shows way too many so is not clear as to which one your referencing.