Here’s an interesting spare battery that can be used as a “his and her’s” charging kit. The Fueltank has two batteries (Lithium ion) which the manufacturer says have 7 times the capacity of the typical mobile phone. Each side of the dual charger can independently power up a device. The cost of the Fueltank is about $69 which includes one proprietary charging adapter. Additional adapters are available on the Fueltank site for $9.95.

Fueltank dual battery backup – $69.95

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