JK BMS BD4A17S4PR is a smart battery management system with active balancing designed for lithium battery packs in 7–17S configuration. 

It features 0.4A active balancing, ensuring stable cell equalization and extended battery lifespan. 

Supports Bluetooth and RS485 communication for real-time monitoring and system integration.  

⚙️ Specifications

•  Configuration: 7–17S / 8–17S 
•  Battery types: Li-ion / LiFePO4 / LTO 
•  Continuous current: 40A 
•  Peak current: 60A 
•  Balancing current: 0.4A (active) 
•  Interfaces: Bluetooth, RS485 / CAN