Product Specifications: x Part No: W-20 x Battery Capacity: 5040 mAh x Battery Type: Li-Polymer x Voltage Output: 3.85 V Compatible with Nighthawk 5G WiFi 6 Mobile Hotspot MR5100. Nighthawk Hotspot MR5200. Package Includes: x Replacement Battery. x Screwdriver Fix Kits x 1 pcs x 12 Month IMPORTANT NOTES: x please notice that use up all the power of Battery for the first time before charging, and then take a full charge, thus the Battery can be reached the optimum effect of using. x Please remember that its full performance and longevity is only achieved after 3 to 5 complete charge and discharge cycles. x Replacing the Battery may require some tech skills, you may need to pay some fees for technician assistance. x If for any reason you are unhappy with our product please do not hesitate to contact us. We will do our very best to solve your problem quickly and efficiently!