All4Cellular offers the Turbo Charge TC2 Portable Reusable Cell Phone Charger, model no. TB550, for $4.95. Coupon code "SAVE20" cuts it to $3.96. With free shipping, that's a buck under our November mention and the lowest total price we could find by $5. It purports to deliver up to three charges using two AA alkaline batteries. Coupon expires April 16.