2pcs NiMH Battery Charging Board Portable Wear-Resistant CC CV Battery Charging Module 1A 3V Function: 1. Charging voltage and current: The battery charging module has stable and efficient performance and excellent battery protection, with a charging voltage of 3V and a charging current of 1A.2. Sturdy and wear-resistant: Our battery charger plates are sturdy, durable and wear-resistant, suitable for long-term use.3. Short circuit protection: The battery charging module supports power supply battery protection, short circuit protection, safe and stable.4. Easy to install: This battery charger module is easy to install, simple and convenient, and can be installed successfully by following the regular process.5. Total light weight: The total weight of our battery charger board is light, which is very portable and can be carried all the time. Specification: Item type: NiMH battery charger board Material: PCB Input voltage: DC 3.7-6V (recommended DC 3.7V 3.8V 4.5 V)Charging voltage: 3VCharging current: 1A Package list: 2 x battery charging board How to use: After matching the appropriate number of battery strings, the wiring is available for use.