Schumacher SC-600A 6/4/2 Amp Charger/Maintainer for $29.99.
http://flash.newegg.com/Product/9SIA08C3ZT9021
Schumacher SC-8020A 80A 12V Fully Automatic Charger with Engine Start for $39.99.
http://flash.newegg.com/Product/9SIA08C3ZT9029
Schumacher SE-1555A 2/20/55/150A 12V Automatic Wheel Charger/Engine Starter for $79.99.
http://flash.newegg.com/Product/9SIA08C3ZT9030
http://flash.newegg.com/Product/9SIA08C3ZT9021
Schumacher SC-8020A 80A 12V Fully Automatic Charger with Engine Start for $39.99.
http://flash.newegg.com/Product/9SIA08C3ZT9029
Schumacher SE-1555A 2/20/55/150A 12V Automatic Wheel Charger/Engine Starter for $79.99.
http://flash.newegg.com/Product/9SIA08C3ZT9030