BMS 4S 14.8V 30A Li-ion Protection Board (18650)
Currently unavailable
No store has this product in stock right now. Prices below are the last ones we recorded.
Prices updated: 13 Oct 2026
Price history
Lowest daily price, last 90 days
Not enough price history yet.
About this product
A battery management system (BMS) protection board for a 4-series pack of 18650 lithium-ion cells, rated for 14.8 V nominal and 30 A peak current with over-current protection. It is intended for DIY 4S battery packs in robotics, tools and portable electronics projects.
Specifications
- Cells in series
- 4S
- Nominal pack voltage
- 14.8 V
- Peak current
- 30 A
- Protection
- Over-current
- Cell type
- 18650 Li-ion
- Transistors
- Original MOSFET
Frequently asked questions
How do I wire the balance leads?
Connect the balance wires in order, starting from B- (negative) at the lowest cell up to B+ at the top cell, then connect the main pack leads.
Does 14.8 V match a 4S pack?
Yes, 14.8 V is the nominal voltage of 4 Li-ion cells at 3.7 V each. A fully charged 4S pack reaches about 16.8 V (4 x 4.2 V).
