Yugster offers this Halo Bolt 5,000mAh Emergency Car Jump Starter and Power Bank for $29.97. Coupon code "FREEYUGBUCK" drops it to $28.97. With $5 for shipping, that's the lowest total price we could find by $6. It features a power level indicator light, LED flashlight, and USB port.
Note: The countdown timer on the product page does not reflect an actual expiration time and resets daily.