EEMB 4PACK Lithium Polymer Battery 3.7V 820mAh 653042 Lipo Rechargeable Battery Pack with Wire JST Connector for Speaker and Wireless Device- Confirm

EEMB 4PACK Lithium Polymer Battery 3.7V 820mAh 653042 Lipo Rechargeable Battery Pack with Wire JST Connector for Speaker and Wireless Device- Confirm

Make Sure Device Polarity Matches with Battery Pack Connector Before Purchase!!!-1.Battery Size; 2.Connector Model; 3.Connector Size; 4.Connector Polarity - This is not universal!!! (It will cause a shortage if the polarity of the battery connector does not match your device.) Basic Info—Voltage: 3.7V; Typical capacity: 820mAh, Min capacity: 770mAh; Weight: approximate 16.4g; Size: 30.5 x 44 x 6.8mm/1.2"x1.69"x0.26" (WxLxH) Reliable Performance—No leaking, excellent cost performance and long cycle life. PCM protection function: over charge, over discharge, over current, short circuit protection. Certifications—UN 38.3 compliant. More than 400 EEMB batteries are UL certified. Search "MH20555" on UL for all EEMB UL certification information. Quality Service— Please contact us if you have any questions or concerns with the product via Amazon message. Storage & Application—Keep the cells in 40%-60% charged state during long period storage. We recommend to charge the battery every 3 months after receipt of the battery and maintain the voltage 3.7-4.0V. Store battery in cool and dry place. Suitable for Bluetooth speaker, dash cam, keyboard and mouse, Wi-Fi smart home systems, PDA and digital cameras, GPS, e-books, tracking devices, blood oxygen tracking equipment, pulse monitors, wireless, IoT.