2S 7.4V 15A Lithium Battery Protection Board (BMS) | 18650 Safe Guard
2S 7.4V 15A Lithium Battery Protection Board (BMS) | 18650 Safe Guard
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Short Product Description
Short Product Description
Don't let a simple short circuit destroy your hard work or pose a safety hazard. This ultra-compact 2S 7.4V 15A Lithium Battery Protection Board (BMS) acts as an invisible shield for your DIY battery packs. Engineered for 18650 and LiPo cells, it automatically prevents overcharging, deep depletion, and overcurrent spikes. Perfect for RC vehicles, robotics, and custom power solutions where reliability is non-negotiable.
Key Features
Key Features
- Overcharge Prevention: Automatically halts charging when cells reach 8.4V, preventing battery swelling and extending overall lifespan.
- Over-discharge Protection: Cuts off power before cells drop to damaging low voltages, ensuring they can be recharged safely.
- Short-Circuit Defense: Millisecond-response safety trigger instantly stops current flow during a short, protecting both the battery and your hardware.
- High Current Output: Sustains a reliable 15A working current, perfectly suited for high-torque motors and heavy-duty electronics.
- Minimal Footprint: The 45x15mm low-profile design easily fits into tight spaces without adding bulk to your battery pack.
Full Product Description
Full Product Description
Protect Your Investment with Intelligent Battery Management
Building your own battery packs is cost-effective, but leaving lithium cells unprotected is a recipe for disaster. Our 2S 7.4V 15A BMS is designed to eliminate the guesswork and anxiety from DIY power systems. By constantly monitoring the voltage and current flow, this module ensures your cells operate strictly within their safe parameters.
Total Protection for High-Drain Projects
Whether you are powering a custom robotic arm or repairing high-drain power tools, stable current delivery is critical. This board supports a continuous 15A discharge rate, providing the robust power your motors and microcontrollers demand without triggering premature cut-offs. If a short circuit occurs, the board instantly breaks the circuit, preventing thermal runaway and permanent battery damage.
Ultra-Compact, Easily Integrated
Space is always at a premium in custom electronics. Measuring at just 45mm x 15mm, this highly efficient PCB slides easily into tight enclosures, heat shrink tubing, or custom 3D-printed battery cases. It’s the ultimate "set it and forget it" component for your next hardware build.
Technical Specifications
Technical Specifications
- Model Type2 Series (2S) Lithium Battery Protection Board
- Nominal voltage: 7.4V (standard Li-ion / LiPo)
- Fully charged voltage: 8.4V
- Operating current: 15A continuous
- Dimensions: 45mm x 15mm
- Compatible cells: 3.7V nominal lithium-ion / LiPo cells, such as 18650 and 21700
- Primary protections: Overcharge, Over-discharge, Overcurrent, Short-circuit
Delivery Options
Delivery Options
- Local delivery within Hong Kong and in-store pickup.
- Free shipping for orders of HK$400 or above; HK$35 shipping fee for orders below HK$400.
- Shipped by SF Express, usually dispatched the same day for orders confirmed before 6:00 PM (Mon–Sat).
- Estimated delivery time: 1–3 business days after dispatch (Hong Kong).
- In-store pickup details (location and time) will be confirmed by email or phone message.
- Delivery times are estimates and may be affected by weather or unforeseen circumstances.
FAQ Section
FAQ Section
Q: Can I use this BMS with a 3S or 4S battery setup?
A: No, this specific board is strictly designed for 2S (2 Series) configurations, meaning two lithium cells wired in series (7.4V nominal). Using it for higher series counts will damage the board.
Q: Does this board balance the batteries while charging?
A: This is a strict protection board (BMS) designed for safety cut-offs. While it protects the overall pack, we recommend ensuring your cells are manually voltage-matched before welding, or using a dedicated balance charger for optimal long-term cell health.
Q: Can I use this with LiFePO4 batteries?
A: No. LiFePO4 batteries have a different voltage chemistry (3.2V nominal). This board is calibrated for standard 3.7V Li-ion/LiPo cells.
Target Users / Applications
Target Users / Applications
- DIY Electronics Enthusiasts: Building custom power banks or powering Arduino/Raspberry Pi projects.
- RC Hobbyists: Creating reliable battery packs for remote-controlled cars, drones, and boats.
- Repair Technicians: Replacing faulty BMS boards in commercial tools, portable speakers, and CCTV backup batteries.
- STEM Educators: Teaching students safe battery handling and circuit fundamentals.
