EEMB Lithium Polymer Battery 3.7V 820mAh 653042 Lipo Rechargeable Pack with wire JST connector for Bluetooth Speaker and Solar Lights confirm device & polarity before purchase

Attention: Confirm 3 Factors Before Purchase - This 3.7V 820mAh LiPo is NOT universal. Verify: (1) Size: 30.5 x 44 x 6.8mm, (2) Connector: JST-PHR-02 2mm Pitch, (3) +/- polarity alignment. Wrong polarity = short circuit. Check red/black wires vs your device. Wide Compatibility: Compatible with Bluetooth speakers, dash cams, keyboards/mice, Wi-Fi smart home, PDA, GPS, digital cameras, e-books, trackers, telematics, sleep monitors, blood oxygen/pULse oximeters, and IoT devices. PCM Safety and Certifications: Built-in PCM protection against overcharge, over-discharge, over-current, short circuit. UL1642, IEC62133-2 certified, and UN38.3 compliant for safe air/sea shipping. Storage Guide: Keep at 40%-60% charge during long-term storage; recharge every 3 months to maintain 3.7-4.0V. Store in cool & dry place (below 25°C) to maximize lifespan. Stable Quality: No leaking, low internal resistance, 500+ cycle life. Reliable rechargeable lithium polymer battery for compact portable electronics.