【Size & Battery Specs】Lithium polymer rechargeable battery pack, DC 3.7V / 380mAh (1S). Max charge voltage/current: 4.25V / 190mA. Energy: 1.41Wh. Compact size: 7 × 20 × 30mm (0.28" × 0.79" × 1.18") (T×W×L), lightweight 8g, with 5cm / 2" wire lead—ideal for small electronics, DIY projects, and compact rechargeable devices.
【Micro JST 1.25mm 2-Pin Connector】Built with a Micro JST 1.25mm 2-pin plug for quick installation and a secure connection. Designed for devices that use a 1.25mm battery port. Please confirm connector type, plug shape, and polarity before ordering.
【Must Confirm Before Purchase】Not universal. Please verify before purchase: (1) battery size 7×20×30mm, (2) connector type: Micro JST 1.25mm 2-pin, (3) plug direction/shape, (4) wire polarity (+/−). Wrong connector or reversed polarity may cause your device not to power on or may damage the circuit.
【Built-in PCM Safety Circuit】Built-in PCM protection provides over-charge, over-discharge, over-current, and short-circuit protection. Helps improve charging safety, supports stable charging cycles, and extends the service life of both the battery and your device.
【Wide Applications for Small DIY & Wireless Devices】Perfect for 3.7V low-to-medium power electronics such as mini Bluetooth accessories, wireless sensors, GPS trackers, monitoring modules, DIY Arduino projects, small IoT devices, and other compact rechargeable applications.