1、PCB Board: Made of PCB board, This power bank board is sturdy, durable, wear resistance, suitable for long term use. 2、Fine Workmanship: This power bank board is well made with stable and efficient performance, excellent protection to the battery. 3、Easy to Install: Comes with a compact size and a light weight as well, the easy installation can be quickly completed. 4、Better Matching: The battery charging board with small size is widely compatible with NiMH NiCd battery, very practical. 5、Ideal Replacement: This battery charging board can be easily installed, ideal replacement for the old and damaged parts. Item Type: NiMH NiCd Power Bank Module Material: PCB Input Voltage: DC 4.5V-5.5V (Recommended DC 5V) 1 x NiMH NiCd Power Bank Module