Amazon offers the La Crosse Technology Alpha Power Battery Charger, model no. BC1000, for $53.98. Clip the 15% off coupon to cut the price to $45.88. With free shipping, that's the lowest total price we could find by $12. It charges NiCd or NiMH AA and AAA batteries. It features charge, discharge, refresh, and test settings.

Update: As a reader has discovered, the price after coupon has dropped to $41.63.