Kmart offers the PNY PowerPack T2200 2,200mAh Universal Portable Rechargeable Battery in Black, model no. P-B-2200-1-K01-RB, or White, model no. P-B-2200-1-W01-RB, for $14.99. Plus, Shop Your Way Rewards members earn $10.15 in SYWR points. (Not a member? It's free to join.) Opt for in-store pickup to dodge the $5.99 shipping charge. Assuming you use the credit, it's the lowest price we could find for a shipped battery by $5, although we saw it for free when factoring the credit on Black Friday. It features a USB port with 1-amp output, 18" microUSB cable, and LED indicator.

Of note, Shop Your Way Rewards members may be eligible for additional credits and discounts. Plus, Shop Your Way Max members are eligible for free shipping.