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. CERTIFICATIONS—UN 38.3 compliant. More than 400 EEMB batteries are UL certified. Search "MH20555" on UL for all EEMB UL certification information.//MANUFACTURER DIRECT— Please contact us if you have any questions or concerns with the product via message. We will respond to you within 24 hours. RELIABLE PERFORMANCE—No leaking, excellent cost performance and long cycle life. PCM protection function: over charge, over discharge, over current, short circuit protection, over temperature protection. BASIC INFO—Voltage: 3.7V; Typical capacity: 250mAh, Min capacity: 230mAh; Weight: approximate 5g; Size: 20.5 x 32 x 5.3mm (WxLxH). 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.).Unit Count: 1 Count. Recommended Uses For Product: Remote controller, E-bike display, MP3 Player, Bluetooth speaker, Wireless headphones, Watch, Recorder, Radio, Flashlight, Camera, Dashcam See more. Battery Cell Composition: Lithium Polymer. Brand: EEMB. Number of Batteries: 1 Lithium Polymer batteries required. Manufacturer: EEMB Co.,Ltd. Date First Available: December 8, 2020. Is Discontinued By Manufacturer: No. Best Sellers Rank: #77,602 in Health & Household. Customer Reviews: 4.1 out of 5 stars 647 ratings 4.1 out of 5 stars. Batteries: 1 Lithium Polymer batteries required. Item model number: LP502030. : B08FD3V6TF. Item Weight: 0.352 ounces. Product Dimensions: 0.81 x 1.26 x 0.21 inches.