【Confirm Device Compatibility】Please double-check battery size 10x 34 x 50mm / 0.39" x 1.34" x 1.97" (T*W*L);Connector Type: PH 2.0mm ; Cable Length: 5cm / 2"., and polarity before purchase. This battery is not universal—incorrect polarity connection may cause malfunction or damage to your device. 【Basic Specifications】3.7V 2000mAh rechargeable Li-ion polymer battery pack (approx. 36g). Compact, lightweight design with PH2.0 connector makes it ideal for DIY electronics and device replacement. Provides stable 7.4Wh energy output for long-lasting performance. 【Safe & Reliable Performance】Built-in PCM protection board safeguards against over-charge, over-discharge, over-current, short-circuit, and overheating. Delivers consistent power output with excellent cycle life, ensuring reliability for your everyday electronics. 【Proper Storage & Maintenance】For long-term storage, keep the battery at 40%–60% charge and recharge every 3 months to maintain 3.7–4.0V. Store in a cool, dry place to extend service life and maintain peak capacity. 【Wide Application Range】Compatible with Bluetooth speakers, dash cams, keyboards, wireless mice, GPS trackers, Wi-Fi smart home devices, e-books, digital cameras, monitoring units, medical tracking devices (blood oxygen monitors, pulse monitors), and more. Perfect for DIY replacements and electronic projects.

This versatile lithium-ion polymer battery is widely compatible with Bluetooth speakers, dash cams, GPS trackers, wireless keyboards and mice, Wi-Fi smart home devices, digital cameras, e-books, monitoring equipment, medical devices (blood oxygen and pulse monitors), and other DIY electronics projects. Whether you are replacing an old battery or powering a new project, this 2000mAh battery delivers safe, portable, and reliable energy.