I don't want to look stupid and it may be too late (LOL), BUT, I have finally got around to hooking up my two volt packs. The problem is, they are at vastly different SOCs so I am looking for a cheap way to bring the lower one up the the same voltage as the higher one before I do the final hookup. I have no chargers yet so looking for some cheap way to do this. Any ideas? It may only be used a couple times.