How to Make an Ultrabattery

https://www.youtube.com/watch?v=N1jusadHkmM

Here is a way to extend life of existing lead-acid batteries to 10,000
cycles. It's gonna take some doing, so will have to get the rubber
gloves and buckets. When Robert Murray-Smith talked about attaching a
layer of carbon on the negative plate, it brought to mind the way
goldpanners used to coat their gold pans with carbon. Seems like it
might be worth trying. Not sure how it would work on sulfated
batteries, so it may need some experiment.