This 3.7V 2000mAh rechargeable lithium polymer battery is designed for Arduino projects, IoT devices, and other electronic applications requiring reliable power. Compact and lightweight, it features a Micro JST 1.25 connector and integrated over current protection. Ready to use with any iot, especially Heltec V3s and alike. Fits all cases sold on this shop and Alleycat cases. Specifications: Standard Voltage: 3.7V Capacity: 2000mAh (7.4Wh) Discharge Rate: 1C Working Current: 1.5A Overcurrent Protection: 1.8A-2.1A Connector Type: Micro JST 1.25 Dimensions: 50mm x 34mm x 10mm Cable Length: 75mm Charging Information: Recommended Charging Current: 0.4A (Maximum: 2A) Recommended Discharging Current: 1A (Maximum: 2A) Note: Avoid charging or discharging at high currents to prevent damage to the protection circuit. Features: Built-in over current protection for enhanced safety. Compact and portable design for easy integration into projects. Suitable for various applications, including Arduino and IoT devices. Warnings: Do not exceed the recommended current and voltage range. Ensure proper handling to avoid damage to the battery or circuits.