Philipat:

Well, you generally don't want to fast-charge a lead-acid battery. Its a great way to get acid sprayed all over the place. But there are new chargers that can do it, if you call 3-4 hours 'fast'.

I googled 'lead acid charge rates' and first hit was this one, on charging [link=http://www.powerstream.com/SLA.htm]Charging Sealed Lead Acid Batteries[/link]http://www.powerstream.com/SLA.htm by PowerStream Batteries.

Judging from the picture, the unit is designed to use the spade lug connectors... gonna use them or solder a set to the spades, YHR?