--- product_id: 176749733 title: "CentIoT - 4S 50A 14.8V 16.8V BMS Battery Management System PCM PCB for 4 Series 18650 li-ion Lithium Ion Battery Pack" brand: "centiot" price: "S/.74" currency: PEN in_stock: true reviews_count: 4 category: "Electronics" url: https://www.desertcart.pe/products/176749733-centiot-4s-50a-14-8v-16-8v-bms-battery-management store_origin: PE region: Peru --- # CentIoT - 4S 50A 14.8V 16.8V BMS Battery Management System PCM PCB for 4 Series 18650 li-ion Lithium Ion Battery Pack **Brand:** centiot **Price:** S/.74 **Availability:** ✅ In Stock ## Quick Answers - **What is this?** CentIoT - 4S 50A 14.8V 16.8V BMS Battery Management System PCM PCB for 4 Series 18650 li-ion Lithium Ion Battery Pack by centiot - **How much does it cost?** S/.74 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.pe](https://www.desertcart.pe/products/176749733-centiot-4s-50a-14-8v-16-8v-bms-battery-management) ## Best For - centiot enthusiasts ## Why This Product - Trusted centiot brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Description Size name:4S 50A Product features: The lithium battery protection board uses a highly integrated intelligent lithium battery protection board integrated chip, the performance is better than the protective board composed of discrete chips. Can complete 5 string polymer lithium battery, ternary lithium battery, lithium iron phosphate, lithium cobalt oxide, lithium manganese oxide battery charge and discharge protection, over current, short circuit, over temperature protection and equalization function. It adopts 4 milliohm ultra-low internal resistance MOS tube, which has low internal resistance and high efficiency. It is suitable for battery pack applications in different fields such as inverters, DC motors, power tools, and solar street lights. Notes: Notes: 1. Please select the appropriate protection board according to the actual battery type and series connection. 2. Before the protection board is installed, the battery must be matched well, and the old and new batteries cannot be mixed. 3. Please remove the cable before wiring, and connect all the wires, and then confirm that the wiring is correct before plugging in the cable. When wiring, the control wiring diagram is gradually connected from the negative pole of the battery. For the thick line, please select the appropriate square wire according to the actual load current value. 4. When the working current is too large, please add tin to the tinned part of the front and back of the protection board, or thicken the copper wire to increase the overcurrent capability of the circuit board. 5. If you need temperature protection function, add 10K NTC resistor (refer to the image). The factory default is no temperature protection resistor. ## Features - 4 Series BMS 50A suitable for li-ion cells connected in series not more than 4 cells, additional cells can be added in parallel - Charging/Discharge current : 50A (Over 20A, please stack the tin-plated part of PCB or add copper wire to increase overflow); - Single Overcharge Protection Voltage: 4.25V  ±0.025V;Single section overcharge relief voltage: 4.15V  ±0.05V;Overcharge protection delay : 1S   ±200mS; - Single Section Over-Amplification Protection Voltage: 2.7V  ±0.05V;Single-section Over-discharge Release Voltage: 3.0V  ±0.1V; Over-discharge protection delay: 1S   ±200mS;Discharge Overcurrent Protection: 70A;Delay of discharge overcurrent protection: 100mS   ±50mS; Short circuit protection: Yes;Short circuit protection delay: 250uS  ±50uS;Short circuit protection recovery mode: Disconnecting Load and Recovering Output Voltage; - Equilibrium Open Voltage: 4.18V  ±0.025V;Balanced current: 55mA;Broken line protection: Yes;Temperature protection: With (valid for external 10K Euro NTC resistance);Charging cryogenic protection : -7°;Charging High Temperature Protection: 50°;Discharge High Temperature Protection : 70°; - ›See more product details ## Images ![CentIoT - 4S 50A 14.8V 16.8V BMS Battery Management System PCM PCB for 4 Series 18650 li-ion Lithium Ion Battery Pack - Image 1](https://images-na.ssl-images-amazon.com/images/I/41kFdmjYi5L.jpg) ![CentIoT - 4S 50A 14.8V 16.8V BMS Battery Management System PCM PCB for 4 Series 18650 li-ion Lithium Ion Battery Pack - Image 2](https://images-na.ssl-images-amazon.com/images/I/51WTM4hABLL.jpg) ![CentIoT - 4S 50A 14.8V 16.8V BMS Battery Management System PCM PCB for 4 Series 18650 li-ion Lithium Ion Battery Pack - Image 3](https://images-na.ssl-images-amazon.com/images/I/51NE0t144gL.jpg) ![CentIoT - 4S 50A 14.8V 16.8V BMS Battery Management System PCM PCB for 4 Series 18650 li-ion Lithium Ion Battery Pack - Image 4](https://images-na.ssl-images-amazon.com/images/I/51C3%2BIkI3fL.jpg) ## Available Options This product comes in different **Size** options. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Nice *by D***L on Reviewed in India on 14 July 2019* Working fine ### ⭐⭐⭐⭐⭐ Good *by S***G on Reviewed in India on 12 August 2019* Good ### ⭐⭐⭐⭐⭐ Good product with very much high price *by R***M on Reviewed in India on 7 November 2019* Excellent product. Timely delivery. But the price is quite high. --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.pe/products/176749733-centiot-4s-50a-14-8v-16-8v-bms-battery-management](https://www.desertcart.pe/products/176749733-centiot-4s-50a-14-8v-16-8v-bms-battery-management) --- *Product available on Desertcart Peru* *Store origin: PE* *Last updated: 2026-09-16*