Walmart offers the La Crosse Technology Alpha Power Battery Charger, model no. BC700, for $29.19. (Amazon charges the same.) Opt for Site-to-Store pickup to dodge the $1.97 shipping fee. That's tied with our mention from a week ago and the lowest price we could find by $8. This charger supports NiCad and NiMH AA and AAA rechargeable batteries and features four modes: charge, discharge, recharge, and test.