$25 off orders over $75 + free shipping with rebate. Promo code: FLINGTired of running out to buy new batteries? Our Universal Battery Charger regenerates virtually all household batteries, including disposable alkaline batteries, NiMH batteries and NiCd batteries up to 70 times. Its four charging docks can simultaneously handle multiple battery types — AA, AAA, C, D and 9-volt — and protect against overcharging, overheating, short-circuits and polarity-reversal issues.