Additional/Replacement Ultra-Compact 10,000 mAh 5V power bank (KE002)Battery (10,000mAh) Stay powered and stay cool. The Gobi Heat 10,000mAh lithium ion battery delivers up to 20 additional hours of performance, so you can beat the heat wherever life takes you. Whether you're working long hours in the sun, exploring the outdoors, or relaxing at home, this compact, high capacity battery keeps your cooling gear running stronger, longer. Compatible with the following cooling products: Breeze Cooling Vest (Unisex) Breeze