As one of its daily deals, Best Buy offers the Tzumi PocketJuice 4,000mAh Portable Charger in Pink, model no. 3510BB-2, for $4.99. Opt for in-store pickup to avoid the $5.49 shipping fee. That's the lowest price we could find by $10. It features two USB ports, LED indicator lights, and rubber shell.

It's also available in 5,200mAh for $9.99. Opt for in-store pickup to avoid the $5.49 shipping fee. That's $3 off and the best price we could find. Both deals end today.