Sears offers the Craftsman C3 19.2-volt Lithium-Ion Battery Charger, model no. 25926, for $39.96. Opt for in-store pickup to avoid the $6.50 shipping fee. That's at least $15 less than you'd spend at a local hardware store. It purports to charge a 19.2-volt Li-ion battery in 60 minutes or less and features a charge indicator light and automatic sleep mode.
Of note, Shop Your Way Rewards members will earn a Sears credit with this purchase and may be eligible for additional credits and discounts. Plus, Shop Your Way Max members are eligible for free shipping.