| Feature | Details |
| Battery Configuration | 3 Series (3S) 11.1V / 12.6V |
| Continuous Discharge Current | 10 Amperes |
| Instantaneous Current | 20 Amperes |
| Overcharge Voltage Range | 4.25V – 4.35V (per cell) |
| Over-discharge Voltage Range | 2.3V – 3.0V (per cell) |
| Dimensions | 50mm x 16mm x 1.0mm |
Reliable Protection for Your Custom 12V Battery Packs The 3S 10A 12V Li-ion Battery Protection Board (BMS) is a critical component for anyone building DIY battery packs using 18650 or other 3.7V lithium-ion cells. This Battery Management System (BMS) acts as the "brain" of your battery pack, ensuring that your cells operate within safe limits. At Robogears, we recommend this specific 10A module for medium-power applications like portable speakers, small robotics, and LED lighting systems where a stable 12V supply is required.
Comprehensive 4-in-1 Protection This module provides four essential safety layers to protect your investment and prevent hazardous situations. It actively monitors for overcharging, preventing cells from exceeding 4.35V; over-discharging, cutting power before cells drop below 3.0V; short-circuit protection to handle accidental wiring mishaps; and over-current protection to prevent damage from excessive loads.
Compact & Efficient Design Measuring just 50mm in length, this slim BMS fits easily into tight enclosures or side-mounted on a 3-cell battery stack. It features high-quality MOSFETs and a precision voltage detection circuit that ensures minimal power consumption while idle. The board is designed for a 10A continuous discharge, making it robust enough to power most DC motors used in hobbyist robotics.
Key Highlights:
3-Series Optimization: Specifically tuned for 11.1V (Nominal) and 12.6V (Full Charge) packs.
Safety First: Prevents battery swelling, fire, or permanent capacity loss.
Automatic Recovery: Restores power automatically once the fault condition (like a short circuit) is removed.
High Efficiency: Low internal resistance ensures maximum runtime for your devices.
Battery Type: 3.7V Li-ion / Lithium Polymer cells
Charging Voltage: 12.6V – 13.0V DC
Maximum Continuous Current: 10A
Peak Discharge Current: 20A (Short duration)
Quiescent Current: Less than 30uA
Internal Resistance: Less than 60m$\Omega$
Short Circuit Protection: Yes, delayed self-recovery
Operating Temperature: -40°C to +50°C
Connection Guide:
B+: Connect to the Positive terminal of the 1st battery.
B-: Connect to the Negative terminal of the 3rd battery.
B1: Connect to the junction between battery 1 and battery 2.
B2: Connect to the junction between battery 2 and battery 3.
P+ / P-: Charging and Discharging ports (Load and Charger connect here).