Desulfation works a treat improving/reviving batteries
 

I've been mucking around with desulfation this last week, even buying a USA made desulfator from the net, here in NZ.

I'd guess that around half of lead acid batteries that are discarded could be revived and reused. I'd also guesstimate that new battery sales could be near halved if desulfation was more used.

An environmental concern really. But battery sellers, manufactures and industry in general dont want joe public to know this!

Really worth a look into on ebay or whatever. I now have 8 good batteries here when I only had 2.

Could be a good sideline to those with access to old batteries, and worth the small investment to most handymen too.