I also have purchased the smaller Universal Charger, which refurbishes all types of batteries. I started the large battery project with it, but because it was intended for smaller batteries I thought I should use the industrial types to speed up the process.
The Universal charger has given new life to many automotive batteries, as long as the cells have not swelled too much from winter freezing. In my collection I have many 10+ year old refurbished batteries: 26 were 7V Prius "BAD" NiMH modules that I got online, which are ~20 years old.
I accidently revived a Lithium razor battery thinking it was NiMH, which is not recommended, however, the charger was very effective nonetheless.
Every experimenter should have something like this, to keep ALS batteries desulfated and NiMH at full capacity. If you have not made your own radiant energy battery charger, consider getting something like the RC-1AU Universal Battery Charger.
Inception
