How much money you got? Har, har! A gel battery will be more expensive than a normal AGM (Absorbed Glass Mat) battery but not as expensive as any with Lithium. Gel is very durable and will not drip even when upside down. I know! We had to salvage an airplane the boss had crashed and the two gel batteries were upside down for over 24 hours and not a drop came out! Other than small tabs for cover latches being broken the cases were intact and they still worked! Their output were not anywhere near a ni-cad.
