That's awesome thanks. Do you know if they're literally sealed for life, if I need to fill them up with water, if I'm still allowed to use these batteries and where I can get a charger from them? Have had the mad idea of using a car battery charger to charge them?

I've had half a heavy built for 12 months but couldn't work out how to mount half of it and now it's clicked, so am frantically get finished for the Northern Tour later in the year lol.