PricePlunge offers the Powerocks Magicstick 2,800mAh Universal Extended Battery in Orange, model no. 370854, for $3.99. Coupon code "SPRING5PLUNGE" cuts it to $3.79. With $2.99 for shipping, that's tied with our mention from last week and the lowest total price we could find by $8. It features an LED charge indicator and microUSB charging cable. Deal ends May 22.