hey Karl how did you get on this weekend did you have that meeting with that guy about the mobility batteries and what type of batterie are you running on
Hi Tom - the guy was Derek from the BVS, check out his electric bike on this thread
http://c5alive.co.uk/forum/index.php?topic=285.0He uses Sonnenschein maintenance-free A500 batteries
http://www.barden-uk.com/golf-cart-batteries.html (plus other links if you google etc)
I'm told these last really well, with no loss of performance after 5years - and the performance of his homemade bike was amazing. However, he only has a 7mile range, and the batteries are very expensive.
Martin and I tend to keep coming back to Halfords car batteries, not the cheapest but you can get a decent battery for reasonable money - plus a useful guarantee.
But as always it all depends on everyones individual circumstances - budget, useful contacts in the trade, how often you intend to use your c5 etc etc.
It may be that buying a couple of cheap batteries over a few years is actually more cost effective than buying one really expensive one that lasts the same amount of time.
For me personally, I'm leaning towards the cheaper batteries 'coz they suit my particular needs at this time.