Anyone heard of the Energizer "simple charger"? I got a $10 coupon from Energizer for some bad batteries and was thinking of using on a charger package. The Simple Charger says it can charge 1-4 batteries, so they don't have to be in pairs. If that's not better, I might get the compact charger that charges in 4 hours. I can't spend a bunch of money on a charger, and I want to use the Energizer coupon. Any thoughts?