The AC224PC-7V3400 is 7.4v 3400mAh version of AC224 li ion rechargeable battery pack made of Samsung/LG/Panasonic 3400mAh/3500mAh 18650 battery. This PC type battery works perfect for 7v heated jacket like Gerbing Gyde Thermite Heated Fleece Vest. The new Gyde heated fleece vest is powered by Gerbing's heating technology to provide maximum warmth and comfort and this battery with 3400mAh capacity would provide more then 3hours of heating by highest setting. Cell options: Panasonic NCR18650B 3400mAh Panasonic NCR18650GA 3500mAh SAMSUNG INR18650-35E 3400mAh LG INR18650F1L 3350mAh LG INR18650MJ1 3500mAh The AC401PC-7V3400 battery is a PWM control battery which allow user to adjust the desirable output power rate. It comes with 4 settings(25%-50%-75%-99%) as standard version. We can make custom setting as request as well. The AC224 battery is designed for electric heated wears application. It has…