Battery Charger recommendation

I have a Harbor freight battery maintainer, sort of battery tender with 4 amps, that I have used with great success. It keeps my 3 cars fully charged. If you want something to charge a near dead battery your going to have to get something with some bulk. The charger I use as a tender is item# 63550 and sometimes on sale for about $23, but not right now. Some of their stuff is junk but not this item because I have 4 of them keeping batteries charged all winter.