Efluky via Amazon offers Prime members its Efluky 19.2-volt 3Ah Nickel-Cadmium Cordless Tool Battery 2-Pack for $37.99. Coupon code "AGSUFEZK" drops it to $32.29 with free shipping. (Non-members can spend $49 or more to qualify for free shipping; otherwise, shipping costs $8.10.) That's $8 under our mention from a week ago and the lowest total price we could find by $11. They're compatible with Craftsman cordless tools.