3 Pack 4S 20A Li Ion BMS For 18650 Battery Protection Board PCM PCB Module 14.8V 16.8V Boss Level Safety Shield For Your Battery Pack With 10A Continuous Current And 20A Peak

Three-pack 4S Li-ion BMS for 18650 packs, 14.8/16.8V
✔️ 3 pcs, 4S 10A cont., 20A peak Li-ion BMS PCM PCB

This 3-pack 4S Li-ion BMS protection board guards 18650 packs with a 14.8V nominal (16.8V max) voltage range. It is designed for compact battery configurations in DIY power projects, tool packs, and emergency backup systems.

✅ 3 pcs 4S Li-ion BMS PCM PCB module with 14.8/16.8V range
✅ Max working current: 10A
✅ Max peak current: 20A
✅ Operating temp: -40°C to +50°C; storage -40°C to +80°C
✅ Standby current: 6uA; resistance: 45mΩ

💡 What is a 4S Li-ion BMS and why do I need it for 18650 packs?

Understanding the core function: - Protects against overcharge and over-discharge in 4S packs - Manages current up to 10A continuous, 20A peak - Keeps cells balanced to maintain capacity and performance - Compatible with 18650 configurations (14.8-16.8V systems) ✝️