4S 20A 18650 Lithium Battery Protection Board
The 4S 14.8V 20A Lithium battery Protection Board comes with over-charge, over-discharge, over-current and short circuit protection, for a variety of various shapes 3.7V lithium-Ion batteries. HXYP-4S-BMD1 is Small size square shape board under which four 18650 cells can be packed suitable for many requirements of high integration, low cost of the occasion, to meet a wide range of performance requirements to ensure that the battery pack is absolutely safe and reliable.
This BMS (Battery Management System) – a battery management system that is designed to monitor the status of batteries, control the battery charge/discharge process, etc. Four 18650 batteries can be connected simultaneously to the HXYP-4S-BM20 module.
The features of this charge controller are protection against short circuit (short circuit) and protection against over-discharge (overcharge). Also, a feature of the module is to turn off the power supply for the batteries when the maximum capacity of at least one battery is reached. The maximum operating current of this BMS controller is 20 A, and the quiescent current reaches up to 10 μA. The battery charge is switched off when the voltage reaches 4.25 – 4.35 V, and the discharge when the voltage drops to 2.3 – 3.0 V.
If the maximum permissible value of the supply voltage is exceeded, the charge controller activates the “protection” mode. In order to restore the module, it is necessary to re-apply voltage to the input of the BMS board or wait a while until the charge controller automatically disables protection.
BMS solder instruction:
B+ connected battery positive;
B1 the connect point between battery 1 and battery 2;
B2 connect the point between battery2 and battery 3;
B3 Connect the point between battery 3 and battery 4;
B- connect to battery negative end;
P- + connection charge / discharge positive;
P- connection charge / discharge negative;
Features:
- Small size designed for a four-cell battery pack.
- Simple wiring and circuit
- Over-charge Protection
Specifications:
| Model | HXYP-4S-BM20 |
|---|---|
| Voltage range | 4.25~4.35V±0.05V |
| Max working current | 10A |
| Max Peak current | 20A |
| Working Temperature | -40~+50 |
| Storage Temperature | -40~+80 |
| Resistance | 45mΩ |
| Small current | 6uA |
| Life cycle | Around 50000hours |
| Length (mm): | 36 |
| Width (mm): | 36 |
| Weight (g): | 4 |
Package Includes:
1 x 4S 20A 18650 Lithium Battery Protection Board
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| Current Rating | 20A |
|---|---|
| Cell Configuration | 4S |
| SKU | AI1055 |
| Weight | 0.0 kg |
| Availability | Out of Stock |
Applications & Use Cases
The 4S 20A 18650 Lithium Battery Protection Board is a versatile battery protection board used across a wide range of applications including lithium battery pack protection, power bank builds, e-bike battery management, solar energy storage, and UPS systems.
Common use cases:
- Building a custom lithium battery pack
- Adding overcharge/overdischarge protection
- Creating a DIY power bank
This product is ideal for battery pack builders and power electronics engineers.
Technical Tip: BMS boards prevent overcharge, overdischarge, overcurrent, and short circuit. Match cell count (S) and max current rating to your battery pack.
Shipping & Delivery
- Free shipping on orders above ₹999 across India
- Dispatched within 1-3 business days
- Expected delivery: 3-7 business days depending on location
- Secure packaging to ensure safe transit of electronic components
Sandeep Kapoor (verified owner) –
Bought multiple units of this 4S 20A 18650 Lithium Battery Protection. All consistent quality. Zbotic is reliable.
Abhishek Rawat –
Okay 4S 20A 18650 Lithium Battery Protection. Output is slightly off from specified but within usable range.
Dinesh Vyas (verified owner) –
This 4S 20A 18650 Lithium Battery Protection performs flawlessly. Voltage regulation is precise and consistent.
Jayesh Bhat (verified owner) –
Good 4S 20A 18650 Lithium Battery Protection. Output is stable. Gets slightly warm under full load but nothing concerning.
Paras Srivastava (verified owner) –
Decent 4S 20A 18650 Lithium Battery Protection. Voltage output is accurate. Compact form factor is a plus.
Parth Dhawan (verified owner) –
Bought multiple units of this 4S 20A 18650 Lithium Battery Protection. All consistent quality. Zbotic is reliable.
Om Kumar –
Nice 4S 20A 18650 Lithium Battery Protection. Works as expected for my power needs. Good efficiency.
Mukesh Yadav (verified owner) –
Decent 4S 20A 18650 Lithium Battery Protection. Voltage output is accurate. Compact form factor is a plus.
Arvind Kumar (verified owner) –
Vaishali Tiwari –
Average 4S 20A 18650 Lithium Battery Protection. Works but efficiency could be better. Adequate for basic projects.
Yash Tiwari (verified owner) –
Nice 4S 20A 18650 Lithium Battery Protection. Works as expected for my power needs. Good efficiency.
Arnav Saini (verified owner) –
Excellent 4S 20A 18650 Lithium Battery Protection! Output is stable and reliable. Perfect for my electronics project.
Shruti Patil –
Perfect 4S 20A 18650 Lithium Battery Protection for my portable project. Battery life is better than expected.
Kartik Agarwal (verified owner) –
Perfect 4S 20A 18650 Lithium Battery Protection for my portable project. Battery life is better than expected.
Aryan Gill (verified owner) –
Outstanding! This 4S 20A 18650 Lithium Battery Protection supplies clean power to my sensitive circuits. No noise at all.
Bharat Kapoor (verified owner) –
Decent 4S 20A 18650 Lithium Battery Protection. Voltage output is accurate. Compact form factor is a plus.
Chirag Arora (verified owner) –
Good quality 4S 20A 18650 Lithium Battery Protection. Ripple is low. Suitable for most electronics projects.
Nikita Jain (verified owner) –
Great 4S 20A 18650 Lithium Battery Protection. Voltage is rock solid under varying loads. Highly recommended.
Girish Naidu (verified owner) –
Decent 4S 20A 18650 Lithium Battery Protection. Voltage output is accurate. Compact form factor is a plus.
Vidya Dave (verified owner) –
Excellent 4S 20A 18650 Lithium Battery Protection! Output is stable and reliable. Perfect for my electronics project.
Vivek Saxena (verified owner) –
Decent 4S 20A 18650 Lithium Battery Protection. Voltage output is accurate. Compact form factor is a plus.
Prateek Krishnan (verified owner) –
Good 4S 20A 18650 Lithium Battery Protection. Output is stable. Gets slightly warm under full load but nothing concerning.