Matrix
I got some 6 to24 volt" Solargizer Battery Maintenance System" P/N i735X150-24l
Pulsers off of Ebay for $25.00 each a couple of years ago and they do work well.
I have used them on Large tractor batterys down to Camcorder batterys. They have definitly cut down on the number of batterys I buy for the Farm.
Geo K