Our products have stable performance, long cycle life, high energy density and stable discharge voltage. - Compatible Model: ZQ520 QLN320 ZQ620 ZQ610HC QLn320HC ZQ620HC ZR628 QLN220 ZQ510 ZQ521 QLn220HC - Battery Part Number: BTRY-MPP-34MAHC1-01 P1023901 BTRY-MPP-34MA1-01 AT16004 P1031365-025 P1031365-069 P1051378 P1023901-LF P1031365-059 Purchase Instructions 1. Please carefully check the compatible model of the battery and the part number of the original battery to determine whether it is compatible with the device. 2. The size is consistent, and the installation is simple and convenient. 3. This product provides one-year after-sales service. If you have any questions, please let us know by email. Instructions for use 1. Do not use a low-quality third-party adapter charger to charge the device. 2. Do not use in high temperature environment. 3. It is strictly prohibited to disassemble, heat, prick and squeeze the battery. 4. Please use the battery reasonably to eliminate potential safety hazards.