For its newsletter subscrbers only, newegg offers the IOGear GearPower Portable Battery, model no. GMP4400PP, for $34.99. Coupon code "NVEXCLS27" cuts it to $16.99. With free shipping, that's the lowest total price we could find by $15 and the best deal we've seen without rebate hassles. (We saw it with a rebate for $4 less a year ago.) This rechargeable 4400mAh battery pack works iPhones, iPods, iPads, and most devices which plug into a USB, or micro-USB power source. Deal ends November 4.