Not sure if you live near an Advance store, but they show Schumacher chargers on their website. There's many choices to look at, plus use one of the online codes now posted on the rebate/promo board, get a decent deal. Order online, pick up in store. Check it out. Just a suggestion.
I have the Sears version of the 50/10/2 amp, works fine. Will start a dead battery if with 50amps selected. Might have to wait a bit between tries, but it works.
Also just got a Battery Tender Jr., mostly for motorcyle because of special connector included. Charged/refreshed all my vehicles, motorcycle and lawnmower with it, great. Wouldn't recommend for dead batteries wanting a quick start though.