Rechargeable lithium-ion batteries ... be able to plug them into any USB port to begin charging. This eliminates not just a separate battery charger, but any cables as well.

today announced that its battery scientists have successfully developed a cost-effective strategy for enabling completion of charging in 5 minutes for a wide range of lithium batteries.

Xiaomi's Ultra-Slim 5000mAh Power Bank offers fast charging, safety features, and portability for on-the-go users.