4S 14.8V / 16.8V 20A Li-Ion BMS with Balance 18650 Lithium Battery Protection Board Overcharge, Over-Discharge, Short Circuit Safety mini water pump for fountain Built on advanced synchronous rectification

Built on advanced synchronous rectification technology

Lightweight & Ergonomic Design – Ultra-comfortable frame with soft nose pads lets you enjoy full-length movies and extended gaming sessions without fatigue

while the colour-coded LCD display makes the sensitivity level crystal clear at a glance

allowing up to 6 riders to stay in seamless

The complete kit includes 8 replacement propellers

4S 14.8V / 16.8V 20A Li-Ion BMS with Balance 18650 Lithium Battery Protection Board Overcharge, Over-Discharge, Short Circuit Safety mini water pump for fountain Built on advanced synchronous rectificationBuilding a DIY battery pack without protection is a fire hazard waiting to happen the 4S 14. 8V 16. 8V 20A Li Ion BMS gives your 18650 lithium battery pack the intelligent safeguarding it deserves, all in one compact board. This Battery Management System (BMS) is engineered for 4 series Li ion and Li polymer packs, delivering four layer protection: overcharge cutoff at 4. 25V per cell, over discharge cutoff at 2. 5V per cell, overcurrent protection at