Best Buy offers two Insignia 5,200mAh USB Portable Battery Packs
in Blue, model no. NS-MB5200B, for $8.99
. (Add two to cart to see this price.) Opt for in-store pickup
to avoid the $5.99 shipping charge. That's $11 off list and the lowest price we could find, although we saw two for $4 less in May. Each includes a 2-foot micro USB cable and features built-in cable management.