Today only, Sears.com drops the price of this DieHard Automatic Battery Charger from $64.99 to $39.99, and then to $33.99 once added to your cart. Shipping is free to a store, or $11.38 to your home. Even with shipping, this is the best deal we could find by $13. This charger can be used with cars, trucks, boats, tractors, and more. It can do a 2 amp trickle, a 10 amp fast charge, or a 50 amp engine start. Sales tax is charged in most states.