The 7.4-volt Li-Ion Plus is part of our new range of Mobile Warming® batteries with Micro USB recharge capability. The 7.4-volt Plus is our premium 7.4-volt battery featuring a larger milliamp-hour capacity, allowing for longer heating times and the ability to target more heat zones than our standard 7.4-volt battery. The 7.4-volt Plus also includes an integrated LED flashlight and a USB output, allowing you to use your battery as a power bank to charge mobile devices. With over 15 years of experience in the heated clothing industry, Fieldsheer® has focused on using the highest quality lithium-ion batteries to ensure durable power and battery life. Our batteries are designed to power your Fieldsheer garment with Mobile Warming® technology, giving you hours of warmth and ensuring you stay warm and comfortable.