D&V Engineering

1. The 3 Series 40A 18650 Lithium Battery Protection Board 11.1V 12.6V with Balance for Drill Motor Lipo Cell Module comes with recovery function-AUTO Recovery and Integrated 10 low load resistance MOS tube.
2. It provides a continuous discharge of 40A, 100mA balanced current, for electric drill/sprayer/LED lights/low power inverter.
3. The Scope of Nominal voltage of 3.6V, 3.7V lithium battery (including 18650,26650, a polymer lithium battery) where Charging voltage can be range between 16.8V to 18.1V The board operates smoothly with Continuous charge current of (upper limit): 20A. The balanced version is suitable for starting current below 80A, power 135W below the drill (with balance).

• Designed for 3.2V LiFePO4 Cells
• Perfect for single-cell lithium iron phosphate battery protection.
• 10A Continuous Current Support
• Suitable for devices requiring steady power output.
• 6MOS High-Efficiency Design
• Ensures low heat generation, improved performance, and higher durability.
• Overcharge Protection
• Prevents battery damage by cutting off charging at safe voltage limits.
• Over-Discharge Protection
• Protects the battery from deep discharge and extends lifespan.
• Overcurrent & Short Circuit Safety
• Automatically disconnects the battery during overload or short circuit conditions.

• 18650 is a common cylindrical lithium-ion cell size (18 mm diameter × 65 mm long).

• A PCM (Protection Circuit Module) is a small electronic board attached to the battery pack that protects it from:

  • Over-charge

  • Over-discharge

  • Over-current / short circuits

• The PCM ensures the cells aren’t damaged and reduces safety risks.

➡️ “18650 PCM 12.6 V” means a 3S 18650 battery pack with a protection circuit, rated for a fully charged voltage of 12.6 V.

• professionally manufactured: With stable performance, professional manufacturing and high reliability.
• perfect choice: This battery charger is an ideal gift choice for your family or friends who are a new generation of itself.
• energy saving: High temperature resistance, cost saving and safe use. Ultra low energy consumption, high efficiency and long service life.
• plug and play: Low temperature and high pressure resistance, more convenient to use. You will not take off the battery during charging.

• Full Charge Voltage: 29.2V

• Special waterproof enclosure ensures reliable operation in:

  • Outdoor environments

  • Humid conditions

  • Solar installations

  • Industrial applications

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    The DALY LFP BMS 8S H/W Waterproof 30A is a robust and dependable battery management solution for 8S LiFePO₄ battery packs. With advanced protection features, waterproof durability, and high current handling, it is an ideal choice for solar, mobility, and backup power applications.

Designed for 8 × 3.2V LiFePO₄ (LFP) cells connected in series:

• Nominal Voltage: 25.6V

• Full Charge Voltage: 29.2V

• Built for heavy-duty applications:
• Continuous Discharge Current: 50A
• Supports high-power loads with stable output

The DALY LFP BMS 8S Hardware Waterproof 50A is an excellent solution for managing and protecting 8S LiFePO₄ battery packs. With high current capability, waterproof design, and advanced safety protections, it is ideal for demanding solar, mobility, and industrial power systems.

• 23S LiFePO₄ Battery Support
• Compatible with 23-cell series LFP battery packs.
• 100A Continuous Discharge Current
• Suitable for medium to high power applications.
• Hardware (H/W) Protection Design
• Fast, stable protection without software latency.
• Waterproof Sealed Structure
• Resistant to moisture, dust, and outdoor environments.

• Comprehensive Protection Functions

  Overcharge protection
• Over-discharge protection
• Charge overcurrent protection
• Discharge overcurrent protection
• Short circuit protection
• High & low temperature protection
• Passive Cell Balancing
• Maintains voltage consistency across all 23 cells to extend battery life.
• High-Quality MOSFET Control
• Stable thermal performance and efficient power management.
• Low Power Consumption
• Minimal standby current to preserve battery capacity.

Designed for 8 × 3.2V LiFePO₄ (LFP) cells connected in series:

• Nominal Pack Voltage: 25.6V

• Full Charge Voltage: 29.2V

The waterproof enclosure provides enhanced protection for use in:

• Outdoor solar power systems

• Humid and harsh environments

• Industrial battery installations

• EV and mobility battery packs

• 23S LiFePO₄ Battery Support
• Compatible with 23-cell series LFP battery packs.
• 50A Continuous Discharge Current
• Suitable for moderate to high-load applications.
• Hardware (H/W) Protection Architecture
• Independent hardware protection ensures fast and reliable response without software delays.
• Waterproof Sealed Design
• Resistant to moisture, dust, and harsh environmental conditions.

• Comprehensive Safety Protections

  Overcharge protection
• Over-discharge protection
• Charge overcurrent protection
• Discharge overcurrent protection
• Short circuit protection
• High and low temperature protection
• Passive Cell Balancing
• Maintains equal voltage across all 23 cells to improve battery performance and lifespan.
• Low Self-Consumption
• Minimal standby power usage for enhanced energy efficiency.
• High-Quality MOSFET Control System
• Stable thermal performance and efficient switching.

• Designed for 23-cell series LFP battery configurations.

• Reliable performance for medium to high power applications.

• Independent hardware circuit design ensures fast and stable protection response.

• Sealed construction suitable for outdoor and humid environments.

Comprehensive Protection Functions

• Maintains consistent voltage across all cells to improve lifespan and performance.

• Efficient charge/discharge switching with stable thermal behavior.
• Low Standby Power Consumption

• 20S LiFePO₄ Support – Optimized for 20-series LFP battery packs (64V nominal system).
• 100A Continuous Discharge Current – Ideal for medium to high-power applications.
• Hardware (H/W) Protection Design – Fast, stable, and independent protection logic.
• Waterproof & Dustproof Housing – Suitable for outdoor and harsh environments.

• Comprehensive Safety Protection:

  Over-charge protection
• Over-discharge protection
• Over-current protection
• Short-circuit protection
• Temperature protection (charge & discharge)
• Automatic cell balancing
• High Precision Voltage Monitoring – Ensures cell consistency and longer battery life.
• Low Standby Power Consumption
• High-Quality MOSFETs – Efficient heat dissipation and stable performance.

• 19S LiFePO₄ Compatibility – Designed for 19-series LFP battery packs (60.8V nominal).
• 50A Continuous Discharge Current – Suitable for light to medium load systems.
• Hardware (H/W) Protection Circuit – Fast, stable, and independent safety response.
• Waterproof & Dustproof Design – Reliable performance in outdoor and rugged environments.

• Complete Protection Functions:

  Over-charge protection
• Over-discharge protection
• Over-current protection
• Short-circuit protection
• Charge & discharge temperature protection
• Automatic cell balancing
• High Precision Voltage Detection – Improves battery consistency and lifespan.
• Low Power Consumption in Standby Mode
• Efficient MOSFET Heat Dissipation

• 19S LiFePO₄ Support – Optimized for 19-series LFP battery packs (60.8V nominal).
• 60A Continuous Discharge Current – Suitable for moderate to high-power applications.
• Hardware (H/W) Protection System – Fast and independent circuit-based safety response.
• Waterproof & Dustproof Housing – Designed for harsh outdoor environments.

• Full Protection Functions:

  Over-charge protection
• Over-discharge protection
• Over-current protection
• Short-circuit protection
• Charge & discharge temperature protection
• Automatic cell balancing
• High Precision Cell Voltage Monitoring – Enhances battery consistency and lifespan.
• Low Standby Power Consumption
• High-Efficiency MOSFET Design – Stable performance with effective heat management.

• 19S LiFePO₄ Compatibility – Designed for 19-series LFP battery packs (60.8V nominal).
• 100A Continuous Discharge Current – Suitable for high-power applications.
• Hardware (H/W) Protection Circuit – Fast, stable, and independent protection response.
• Waterproof & Dustproof Housing – Reliable in harsh and outdoor environments.

• Comprehensive Protection Functions:

  Over-charge protection
• Over-discharge protection
• Over-current protection
• Short-circuit protection
• Charge and discharge temperature protection
• Automatic cell balancing
• High-Precision Voltage Detection – Maintains cell consistency and extends battery lifespan.
• Low Standby Power Consumption
• High-Performance MOSFETs – Efficient current handling and heat dissipation.

• 15S LiFePO₄ Compatibility – Designed for 15-series LFP battery packs (48V nominal).
• 40A Continuous Discharge Current – Ideal for light to medium load applications.
• Hardware (H/W) Protection Circuit – Fast and independent safety response.
• Waterproof & Dustproof Enclosure – Reliable performance in humid and outdoor environments.

• Comprehensive Protection Functions:

  Over-charge protection
• Over-discharge protection
• Over-current protection
• Short-circuit protection
• Charge & discharge temperature protection
• Automatic cell balancing
• High-Precision Cell Voltage Monitoring – Enhances battery consistency and lifespan.
• Low Standby Power Consumption
• Efficient MOSFET Design – Stable current output with effective heat dissipation.

• 15S LiFePO₄ Support – Compatible with 15-series LFP battery packs (48V nominal).
• 50A Continuous Discharge Current – Suitable for moderate to high-power applications.
• Hardware (H/W) Protection Design – Fast, stable, and independent circuit-based safety protection.
• Waterproof & Dustproof Housing – Designed for rugged and outdoor installations.

• Comprehensive Protection Functions:

  Over-charge protection
• Over-discharge protection
• Over-current protection
• Short-circuit protection
• Charge & discharge temperature protection
• Automatic cell balancing
• High-Precision Voltage Detection – Improves cell consistency and battery lifespan.
• Low Standby Power Consumption
• High-Efficiency MOSFET Structure – Reliable current handling with effective heat dissipation.

• Designed for 15S LFP Battery Packs – Optimized for 48V LiFePO4 systems
• 80A Continuous Discharge Current – Stable high-current output performance
• Waterproof Design – Suitable for outdoor and humid environments
• Intelligent Cell Balancing – Maintains voltage consistency across cells

• Comprehensive Protection Functions

  Overcharge protection
• Over-discharge protection
• Overcurrent protection
• Short-circuit protection
• Temperature protection
• High Precision Voltage Detection – Ensures accurate battery monitoring
• Low Power Consumption – Efficient standby performance
• Durable Construction – Designed for long-term industrial use

• Designed for 15S LiFePO₄ Battery Packs – Optimized for 48V LFP systems
• 100A Continuous Discharge Current – High current handling capability
• Waterproof Sealed Housing – Ideal for outdoor and humid environments
• Hardware (H/W) Version – Reliable and stable protection architecture
• Intelligent Passive Balancing – Maintains uniform cell voltage

• Comprehensive Safety Protections:

  Overcharge protection
• Over-discharge protection
• Overcurrent protection
• Short-circuit protection
• Charge & discharge temperature protection
• High-Precision Voltage Detection – Accurate per-cell monitoring
• Low Standby Power Consumption – Energy-efficient design
• Industrial-Grade Components – Long service life and durability

• Compatible with 15S LiFePO₄ Battery Packs – Optimized for 48V systems
• 120A Continuous Discharge Current – Suitable for high-power applications
• Waterproof Sealed Housing – Reliable in humid and outdoor environments
• Hardware (H/W) Version – Stable and durable protection structure
• Intelligent Passive Cell Balancing – Maintains equal voltage across cells

• Comprehensive Protection System:

  Overcharge protection
• Over-discharge protection
• Overcurrent protection
• Short-circuit protection
• High/Low temperature protection
• Accurate Voltage Monitoring – High-precision cell detection
• Low Power Consumption – Efficient standby operation
• Industrial-Grade MOSFETs & Components – Enhanced reliability

• Designed for 15S LiFePO₄ Battery Packs – Optimized for 48V LFP systems
• 200A Continuous Discharge Current – Suitable for high-power applications
• Waterproof Sealed Housing – Reliable in outdoor and humid environments
• Hardware (H/W) Protection Design – Stable and robust performance
• Intelligent Passive Balancing – Maintains consistent cell voltage

• Comprehensive Safety Protection:

  Overcharge protection
• Over-discharge protection
• Overcurrent protection
• Short-circuit protection
• Charge & discharge temperature protection
• High-Precision Voltage Detection – Accurate real-time monitoring
• Low Standby Power Consumption – Energy-efficient operation
• Industrial-Grade MOSFET Technology – Enhanced thermal and electrical stability

• Advanced Battery Protection
• Overcharge Protection – Prevents cells from exceeding safe voltage limits.
• Over-discharge Protection – Stops deep discharge that can damage cells.
• Over-current Protection – Limits current to protect against short circuits and high load damage.
• Short-Circuit Protection – Instantly disconnects in fault conditions to prevent damage.
• ✔️ Waterproof and Durable
• H/W Waterproof Housing – Sealed hardware design suitable for outdoor use, protecting internal circuitry from moisture, dust, and splash exposure.
• High-Quality Components – Long-lasting performance with reliable build quality.
• 📐 Battery Monitoring and Balancing
• Cell Balancing – Ensures all 16 cells maintain equal voltage for maximum capacity and longevity.
• Real-Time Monitoring – Tracks cell voltages, pack voltage, temperature, and current to ensure safety.
• ⚡ High Performance
• 60A Continuous Discharge – Suitable for moderate to high-current applications.
• Temperature Compensation – Monitors and protects against extreme thermal conditions.
• 🔌 Easy Integration
• Compatible with most standard 16S LiFePO₄ battery packs.
• Simple wiring interface for quick setup.

• Overcharge Protection – Prevents cells from exceeding safe voltage levels.

• Over-discharge Protection – Keeps cells from deep discharge that can cause irreversible damage.

• Over-current & Short-circuit Protection – Protects the battery pack from excessive current draw and electrical faults.

• Reverse Polarity Protection – Guards against incorrect battery wiring.

• Active Cell Balancing – Equalizes cell voltages to maximize capacity and extend battery life.

• Voltage & Temperature Monitoring – Continuously checks critical parameters to ensure safe operation.

• Real-time Diagnostics – Detects and responds to anomalies instantly.

• Sealed Housing – Durable enclosure protects internal components from water spray, dust, and moisture, ideal for outdoor and harsh environments.

• Robust Construction – High-quality components for stable performance and long-term reliability.

• 50A Continuous Discharge – Suitable for medium-current applications such as e-vehicles, solar storage, and more.

• Wide Operating Temperature Range – Ensures reliable function in varied environmental conditions.

• Easy Integration – Compatible with standard 16S LFP battery packs and simple to install.

• Overcharge Protection – Prevents cells from charging above safe voltage limits.

• Over-discharge Protection – Stops cells from deep discharge to extend battery life.

• Over-current & Short-Circuit Protection – Protects batteries from excessive current draw and electrical faults.

• Reverse Polarity Protection – Safeguards from incorrect wiring connections.

• Cell Balancing – Ensures all 16 battery cells stay equal in voltage to maximize capacity and lifespan.

• Voltage Monitoring – Constant tracking of each cell’s voltage for precise control.

• Temperature Protection – Monitors temperature (with sensor) to prevent overheating damage.

• Hardware Waterproof Design – Sealed enclosure protects against water ingress, dust, and harsh environments.

• High-Quality Build – Durable, industrial-grade components for enhanced long-term reliability.

• 80A Continuous Discharge Current – Ideal for higher-power systems such as electric vehicles, solar storage, and industrial applications.

• Wide Operating Temperature Range – Reliable function in diverse environmental conditions.

• Easy Integration – Compatible with standard 16S LiFePO₄ battery packs and straightforward to install.

• Overcharge Protection – Prevents over-voltage to protect cells from stress and damage.

• Over-discharge Protection – Prevents cells from deep discharge, prolonging battery life.

• Over-current & Short-Circuit Protection – Safeguards the battery and wiring from excessive current events.

• Reverse Polarity Protection – Protects against incorrect battery connection.

• Cell Balancing – Automatically balances each of the 16 cells to maximize usable capacity and improve pack longevity.

• Voltage & Temperature Monitoring – Tracks cell voltages and temperature (with sensor) to ensure safe operation.

• Real-Time Diagnostics – Detects abnormal conditions and responds to protect the pack.

• Sealed, Waterproof Housing – Designed to withstand moisture, water spray, and dust—perfect for outdoor and rugged environments.

• Sturdy Construction – Industrial-grade components for durability and dependable performance.

• 100A Continuous Current – Suitable for high-power systems such as electric vehicles, large solar storage banks, and commercial battery applications.

• Wide Operating Conditions – Reliable performance across various temperatures and environments.

• Easy Integration – Compatible with standard 16S LiFePO₄ battery packs with straightforward wiring.

• 30A Continuous Discharge Current – Suitable for moderate-power systems like e-bikes, scooters, solar setups, and more.

• Easy to Install – Same port simplifies wiring and reduces clutter.

• Wide Operating Temperature Range – Works reliably in varied environmental conditions.

• Overcharge Protection – Prevents cells from charging beyond safe voltage.

• Over-discharge Protection – Stops deep discharge to preserve battery health.

• Over-current & Short-Circuit Protection – Safeguards the battery and wiring during high load conditions.

• Reverse Polarity Protection – Protects the BMS from damage due to incorrect wiring.

• Cell Balancing – Balances all 8 cells to maintain equal voltages and maximize usable capacity.

• Voltage & Temperature Monitoring – Tracks critical values to ensure safe and stable battery operation.

• Real-Time Fault Detection – Detects abnormal conditions and responds instantly to protect the pack.

• Hardware Waterproof Design – Fully sealed enclosure resists water spray, dust, and moisture — ideal for outdoor, marine, or rugged environments.

• Robust Construction – Built with quality components for long service life.

• 20A Continuous Discharge – Suitable for small-to-medium current applications like e-bikes, solar systems, power tools, and more.

• Wide Temperature Range – Operates reliably across varied environmental conditions.

• Easy Installation – Compatible with standard 8S LiFePO₄ battery packs with straightforward wiring.

• Overcharge Protection – Prevents cells from exceeding safe voltage limits to avoid stress and damage.

• Over-discharge Protection – Protects cells from deep discharge that can reduce capacity and battery life.

• Over-current & Short-Circuit Protection – Automatically disconnects the pack during high-current or fault conditions.

• Reverse Polarity Protection – Protects the BMS from damage due to incorrect wiring.

• Cell Voltage Monitoring – Constantly checks each cell’s voltage for precise battery management.

• Cell Balancing – Equalizes voltages across all cells, maximizing overall pack capacity and stability.

• Temperature Protection – Works with an external sensor (optional) to prevent overheating and thermal damage.

• Waterproof Sealed Enclosure – Hardware-level ingress protection against water spray, dust, and moisture. Ideal for outdoor, marine, and rugged applications.

• Durable Build Quality – Industrial-grade components for long-term reliability.

• 40A Continuous Discharge – Suitable for medium-power electric vehicles, solar storage systems, and other 8S battery applications.

• Wide Temperature Operation – Reliable performance across varied environmental conditions.

• Straightforward Installation – Compatible with standard 8S LFP battery packs and easy to wire.

1. Supports 2-cell series (2S) 18650 Li-ion battery packs
2.  Rated for 20A continuous discharge current
3. Overcharge protection ensures battery safety and longevity
4. Over-discharge protection prevents deep discharge damage
5. Overcurrent and short-circuit protection for enhanced safety
6. Automatic recovery after fault removal
7.  Compact and lightweight design – easy to integrate into battery packs
8. Ideal for custom lithium battery applications

1. 13S Battery Protection: Supports 13-cell (48V nominal) lithium-ion or LiFePO₄ battery packs.
2. 20A Continuous Discharge: Suitable for mid-power applications like e-bikes and energy storage.
3. Full Protection Circuitry: Overcharge, over-discharge, short-circuit, and overcurrent protection.
4. Cell Balancing Function: Ensures even charge/discharge across all cells to extend battery life.
5. Compact and Durable: Space-saving PCB design with quality components for long-term reliability.
6. Plug-and-Play Ready: Easy to integrate into custom battery packs with labeled connections.

1. 2S 3A BMS
2. Charging Voltage: 8.4V to 9V
3. Charging Current: 3A
4. Discharge Current: 2A
5. Overcharge, Over discharge, over current protection
6. Over-Discharge Detection Voltage: 2.3 ~ 3.0 ± 0.05V.
7. Maximum Working Current: 3A.
8. Transient Current: 5A.
9. Operating Temperature : -40 ~ +80 °C.
10. Package Includes : 1 x 2S 3A Li-ion Lithium Battery 7.4V 8.4V 18650 Charger Protection Board Module.

1. Overcharging and Over Discharging Protection & Short circuit protection
2. Applicable assembly: Nominal 4.5V Batteries / 3 strings.
3. Charging voltage: 12.6V-13V
4. Overcharge detection voltage range: 4.25-4.35V±0.05V
5. Over discharge detection voltage: 2.3-3.0V±0.05V

• The battery internal resistance tester can measure internal resistance and voltage of the battery at the same time.The Kelvin four-wire test clamp is adapted in order to better avoid the influence of contact resistance and wire resistance, and more accurate measurement can be performed;
• It adopts intelligent control, liquid crystal display, and simultaneous insertion of Kalman filter mathematical algorithm, which has the advantages of high precision, high efficiency, low cost, light weight, energy saving and environmental protection.
• It is Built-in 1000mAh lithium battery, 5V charging, Android mobile phone charger can be used, which is very convenient.
• It is widely used in various battery production, maintenance, testing, scientific research laboratories and other occasions.
• It can also be used to measure AC resistance of capacitors and resistors with low resistance and high precision.

• 4S LiFePO₄ Support
• Designed for 24-cell series LFP battery packs (Nominal 76.8V system).
• Hardware (H/W) Protection Architecture
• Fast and reliable protection response without software delays.
• Waterproof & Moisture-Resistant Design
• Sealed enclosure suitable for outdoor and humid environments.

• Comprehensive Protection Functions

  Overcharge protection
• Over-discharge protection
• Overcurrent protection (charge & discharge)
• Short circuit protection
• Temperature protection (high & low temp cut-off)
• Cell Voltage Balancing
• Passive balancing to maintain uniform cell voltage and extend battery lifespan.
• High Current Capability
• Available in multiple current ratings (e.g., 60A / 80A / 100A / 150A / 200A depending on model).
• NTC Temperature Monitoring
• Multiple temperature sensors for accurate thermal management.
• Stable MOSFET Performance
• High-quality MOSFETs ensure efficient and safe charge/discharge control.
• Low Self-Consumption
• Energy-efficient design for minimal standby power drain.

Designed for 8 × 3.2V LiFePO₄ (LFP) cells in series:

• Nominal Voltage: 25.6V

• Full Charge Voltage: 29.2V

• Rugged waterproof enclosure ensures safe operation in:

  • Outdoor environments

  • Solar power installations

  • Humid and harsh conditions

  • Industrial setups

  • The DALY LFP BMS 8S Hardware Waterproof 40A is a powerful and durable battery management solution for 8S LiFePO₄ battery packs. With advanced safety protections, cell balancing, and waterproof construction, it is perfect for demanding energy storage and mobility applications.

• 23S LiFePO₄ Compatibility – Designed for 23 cells in series (23S) LFP battery packs
• 80A Continuous Discharge Current – Supports high-power applications with stable performance
• Hardware (H/W) Protection Design – Fast and reliable circuit-level protection response
• Waterproof Enclosure – Sealed casing for moisture, dust, and harsh environment resistance
• Smart Cell Balancing – Maintains uniform cell voltage for extended battery lifespan

• Multiple Protection Functions:

  Overcharge protection
• Over-discharge protection
• Overcurrent protection
• Short-circuit protection
• Temperature protection (high & low)
• High-Accuracy Voltage Detection – Ensures precise battery monitoring
• Low Power Consumption – Efficient standby performance
• Wide Application Range – Suitable for solar storage systems, electric vehicles, boats, RVs, and industrial equipment

�� Multiple Safety Protections:

📊 Comprehensive Safety Protection: