These 7.4-volt Powersheer™ 6000 mAh battery comes standard in our Unisex Heated Baselayer Vest sold on our website and at Costco. It is also compatible with all Fieldsheer 7.4-volt Heated Jackets, Vests, and Baselayers, providing 2-3x longer heat time between charges. Specifications: Rating: 7.4volts, 6000mAh Input: USB-A 5v 3A / USB-C 12v 1.67A DC Port Output: 7.4V@1.8A max USB-A Port Output: 5v 3A USB-C Port Output: 9v 2.2A LED Light Battery Meter Charge Time: 4-5 hours* Footnote: Charge time is based off using a USB-A wall charger that delivers 5V@2.1A Size Inches: 4.25in x 2.5in x 0.9in Battery SKU: MWLB74V06024 Includes: (1) 7.4volts, 6000mAh Battery Replacement Battery for the Following Models: MWUV26 Base Layer Vest sold at Costco and On-Line