Product Specifications: Part No: MiFi 7730L Battery Capacity:4400mAh Battery Type: Li-ion Voltage Output: 3.8 V Compatible With: Verizon Jetpack Wifi HotSpot MIFI7730L and MIFI8800L Verizon Jetpack. Package Includes: Replacement Battery. Important Notes: Please confirm the compatible model and battery part number carefully before you purchase it. If you are not sure, please send email to us with your battery details or pictures, we will give you professional suggestions. 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. Please remember that its full performance and longevity is only achieved after 3 to 5 complete charge and discharge cycles. If you receive any products with any quality problems, please communicate with us, we will deal with you in the first time, thank you!