Newegg offers the Fremo P52 5,200mAh External Battery Charger for $17.99. Coupon code "EMCAKNX37" cuts it to $9.99. With free shipping, that's tied with our mention from two weeks ago as the best price we've seen for this charger. (It's a current price low by $8.) It supports most 5-volt input USB-charged devices. Deal ends February 4.