i use a 1.5 amp charger.
http://www.walmart.com/ip/Schumacher...ndingMethod=rr
i'm looking to get a better charger because charging a deep cycle battery with a 1.5 amp charger takes a really long time (like 2 days lol). maybe something like this
http://www.walmart.com/ip/Schumacher...ndingMethod=rr