I have 75Ah leisure that I bought from my local caravan shop.
It's been rebranded by the shop, but appears to be a Supac battery?!?!
I bought it in April 2010, and have been charging it with a Numax connect and forget leisure charger. Maybe not the cheapest charger, but it appears to work very well!
I use the leisure at nationals where I get 7 charges per day out of it, so 14 drive battery charges in total over a national weekend, plus charging my Transmitter sometimes, plus charging a phone maybe once or twice (more if other people jump on it too), plus pumping an airbed up and powering lights in the evening while camping, and I've never seen the voltage drop below the point where it will no longer charge my RC car battery!!!
It doesn't get recharged in any way during the weekend btw.
At regionals and club days I can often have 2 people or both my 2wd and 4wd batteries charging off it all day, so again doing 10+ charges without a worry.
In fact, the battery has a small indicator built in to the top of it, very simple little fluid chamber...it changes colour according to the state of the battery and I've never seen it drop down to the red 'I'm flat, please charge me' state.
I would expect your leisure to outlast your race meeting demands easily, and if your interested to know how much it will do, then try using it til it's flat and see how far you get. Just do that somewhere/sometime you have backup!
