The GP Heated Jacket Batery Pack - interacts with our heated styles Overcharge & Discharge protection Short circuit protection Over voltage protection Over and under tempreture protection Over current protection Loop back protection Capacity: 5000 mAh Input: Micro-USB: 5V DC 1A Output: USB-A x 2: 5V DC 2.1A Dimension: 125.5(L) x 70(W) x 10(H)mm Weight: 147g (approx.) Batery Type: Li-Polymer Suitable for use with TRA210 and TRA527