--- product_id: 489486341 title: "Electronic Spices 3S 40a 12.6v 18650 Li-ion Lithium Battery Protection and Charger Bms Module Pack of 1pcs" price: "436269β‚«" currency: VND in_stock: true reviews_count: 8 url: https://www.desertcart.vn/products/489486341-electronic-spices-3s-40a-12-6v-18650-li-ion-lithium store_origin: VN region: Vietnam --- # 40A high current rating 12.6V charging voltage Overcharge & discharge protection Electronic Spices 3S 40a 12.6v 18650 Li-ion Lithium Battery Protection and Charger Bms Module Pack of 1pcs **Price:** 436269β‚« **Availability:** βœ… In Stock ## Summary > πŸ› οΈ Master your battery’s power with precision and protection! ## Quick Answers - **What is this?** Electronic Spices 3S 40a 12.6v 18650 Li-ion Lithium Battery Protection and Charger Bms Module Pack of 1pcs - **How much does it cost?** 436269β‚« with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.vn](https://www.desertcart.vn/products/489486341-electronic-spices-3s-40a-12-6v-18650-li-ion-lithium) ## Best For - Customers looking for quality international products ## Why This Product - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - β€’ **Optimized for Longevity:** Low current consumption ensures stable performance and extended battery life - β€’ **Power-Packed 40A Current:** Handles high current loads for versatile DIY and EV projects - β€’ **Precision Voltage Control:** Maintains safe 12.6V charging with tight voltage thresholds - β€’ **Triple-Layer Battery Safety:** Protects against overcharge, overdischarge, and overload scenarios - β€’ **Compact & Lightweight Design:** Small 13x13x8 cm footprint with just 20g weight for easy integration ## Overview The Electronic Spices 3S 40A 12.6V BMS module is a compact, reliable battery management system designed to protect 3-cell 18650 Li-ion packs. It features a robust 40A current rating, precise voltage control for safe charging, and safeguards against overcharge, overdischarge, and overload. Ideal for DIY power banks and electric vehicles, this lightweight module ensures stable performance and extends battery lifespan when paired with proper charging practices. ## Description This is a battery management system module. It works on the 40A power current. This BMS module is commonly used to manage and protect the battery from overcharge or discharge. It is very safe and reliable to use. This module provides short circuit protection; overload, discharge and overcharge protection. This little piece of equipment ensures the safety and protection of your battery pack. So that the battery can provide you with long service life. This module has low current consumption and provides stable performance. Γ‚ Due to its small size, excellent performance, and low cost. This product is suitable to meet a wide range of requirements. Review: Good item - You can connect the battery to this cable to make it work well with power in and power out. Review: READ THIS REVIEW BEFORE USING IT OR YOU WILL KILL THE BMS! - Pros : 1) Balance Charging 2) Overcharge Protection 3) Overdischarge Protection Cons : 1) It does not offer any overcurrent protection while discharging, the mosfets will simply explode. 2) It does not offer any current limiting feature, basically if your battery is at 12.6v, it's cutoff is 12.75v, means if you connect it to a 10A charging supply when it is 80-90% charged, it will just charge the batteries with 10A till their voltage is 4.25V, and we all know if we give enough current to a battery no matter it's charged or not it's voltage will rise, so you need a charger to charge with this BMS. 3) It DOES NOT HAVE A SHORT CIRCUIT PROTECTION, your BMS MOSFETs will simply explode, it's not made for short circuit protection. 4) MOSFETs get hot and you need a cooling system to run this BMS at 40A. 5) Charging voltage is 12.6-13.6V, means you CANNOT USE IT IN AN INVERTER, Connecting it to an inverter will simply kill the BMS because inverters charge batteries at 14.6V and sometimes 15V, this BMS will die at that voltage. 6) This is a fragile BMS, your slightest stupidity can kill it. Things to keep in mind : 1) Do not charge with current over 10A. 2) Do not exceed a charging voltage of 13.6V or the BMS will die. 3) Do not short circuit the output or MOSFETs will explode and BMS will die, not covered under warranty or replacement. 4) After the battery is done charging, i.e., each cell's voltage exceeds 4.25v with an offset of 0.05 volts, the BMS will disconnect from charging and the BMS output will be from the load MOSFETs, which reduces the voltage by 0.3V, means if your battery is at 12.6V, it'll output 12.3V. 5) If you apply too much voltage while charging the BMS will simply shut down. 6) Once the batteries are charged, the BMS will start charging the batteries only after it's down to 4.17V per cell. 7) This BMS offers only balance charging and if one of your cells is bad, the cell will simply discharge faster, and the overdischarge protection is activated when any one of the 3 cells go down below a voltage of 3.3v. 8) Do not exceed the charging voltage of 13.6V as long as you don't wanna kill the BMS. 9) Charge with a constant current and constant voltage of 12.9V for the best results, and once the pack reaches 4.15V per cell or 12.45V, reduce the current for better and more efficient charging. ## Features - Brand new and reliable product | Charging voltage : DC 12.6V | Current consumption : 40A | Over charge detection voltage : 4.25 Β± 0.025 - Over charge release voltage : 3.80VΒ±0.05V | Over discharge detection voltage range : 2.50 Β± 0.08 | Over discharge release voltage : 32.5Β±0.1V | Low current consumption. | Stable performance - This is the pack of a single piece of 3S 40A 12.6V 18650 Li-ion Lithium battery protection and charger BMS module | Protects 3-cell lithium-ion battery packs from overcharging, over-discharging, and overcurrent. - Features a 40A current rating for versatile applications | Includes built-in charging functionality | Ideal for DIY power banks, electric vehicles, and lithium-ion battery pack management. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0BJVPGDQ8 | | Best Sellers Rank | #8,422 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #278 in Robotic Kits & Accessories | | Brand | Electronic Spices | | Colour | Multi | | Country of Origin | India | | Customer Reviews | 3.8 3.8 out of 5 stars (236) | | Date First Available | 20 October 2022 | | Generic Name | BMS BATTERY MODULE | | Importer | Electronic Spices, Main, Ismailpur Rd, near Gyan Mandir Chowk, F- Block, Jaitpur, New Delhi, Haryana 110044 (8929992403) | | Included Components | 18650 Li-ion Lithium Battery Protection | | Item Dimensions LxWxH | 13 x 13 x 8 Centimeters | | Item Height | 8 Centimeters | | Item Weight | 20 g | | Item Width | 13 Centimeters | | Item model number | FWR629 | | Main power connector | 2 pin | | Manufacturer | Electronic Spices, Electronic Spices, Main, Ismailpur Rd, near Gyan Mandir Chowk, F- Block, Jaitpur, New Delhi, Haryana 110044 (8929992403) | | Model number | FWR629 | | Net Quantity | 1 Count | | Number of Memory Sticks | 1 | | Packer | Electronic Spices, Main, Ismailpur Rd, near Gyan Mandir Chowk, F- Block, Jaitpur, New Delhi, Haryana 110044 (8929992403) | | Product Dimensions | 13 x 13 x 8 cm; 20 g | | Special Feature | short circuit protection | ## Images ![Electronic Spices 3S 40a 12.6v 18650 Li-ion Lithium Battery Protection and Charger Bms Module Pack of 1pcs - Image 1](https://m.media-amazon.com/images/I/61gAf60ygEL.jpg) ![Electronic Spices 3S 40a 12.6v 18650 Li-ion Lithium Battery Protection and Charger Bms Module Pack of 1pcs - Image 2](https://m.media-amazon.com/images/I/61SwUgXlWpL.jpg) ![Electronic Spices 3S 40a 12.6v 18650 Li-ion Lithium Battery Protection and Charger Bms Module Pack of 1pcs - Image 3](https://m.media-amazon.com/images/I/61Zzu0OsHdL.jpg) ![Electronic Spices 3S 40a 12.6v 18650 Li-ion Lithium Battery Protection and Charger Bms Module Pack of 1pcs - Image 4](https://m.media-amazon.com/images/I/61ySVma47ML.jpg) ![Electronic Spices 3S 40a 12.6v 18650 Li-ion Lithium Battery Protection and Charger Bms Module Pack of 1pcs - Image 5](https://m.media-amazon.com/images/I/61zr+2uKOYL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Good item *by P***R on 29 September 2025* You can connect the battery to this cable to make it work well with power in and power out. ### ⭐⭐⭐⭐ READ THIS REVIEW BEFORE USING IT OR YOU WILL KILL THE BMS! *by A***A on 7 February 2024* Pros : 1) Balance Charging 2) Overcharge Protection 3) Overdischarge Protection Cons : 1) It does not offer any overcurrent protection while discharging, the mosfets will simply explode. 2) It does not offer any current limiting feature, basically if your battery is at 12.6v, it's cutoff is 12.75v, means if you connect it to a 10A charging supply when it is 80-90% charged, it will just charge the batteries with 10A till their voltage is 4.25V, and we all know if we give enough current to a battery no matter it's charged or not it's voltage will rise, so you need a charger to charge with this BMS. 3) It DOES NOT HAVE A SHORT CIRCUIT PROTECTION, your BMS MOSFETs will simply explode, it's not made for short circuit protection. 4) MOSFETs get hot and you need a cooling system to run this BMS at 40A. 5) Charging voltage is 12.6-13.6V, means you CANNOT USE IT IN AN INVERTER, Connecting it to an inverter will simply kill the BMS because inverters charge batteries at 14.6V and sometimes 15V, this BMS will die at that voltage. 6) This is a fragile BMS, your slightest stupidity can kill it. Things to keep in mind : 1) Do not charge with current over 10A. 2) Do not exceed a charging voltage of 13.6V or the BMS will die. 3) Do not short circuit the output or MOSFETs will explode and BMS will die, not covered under warranty or replacement. 4) After the battery is done charging, i.e., each cell's voltage exceeds 4.25v with an offset of 0.05 volts, the BMS will disconnect from charging and the BMS output will be from the load MOSFETs, which reduces the voltage by 0.3V, means if your battery is at 12.6V, it'll output 12.3V. 5) If you apply too much voltage while charging the BMS will simply shut down. 6) Once the batteries are charged, the BMS will start charging the batteries only after it's down to 4.17V per cell. 7) This BMS offers only balance charging and if one of your cells is bad, the cell will simply discharge faster, and the overdischarge protection is activated when any one of the 3 cells go down below a voltage of 3.3v. 8) Do not exceed the charging voltage of 13.6V as long as you don't wanna kill the BMS. 9) Charge with a constant current and constant voltage of 12.9V for the best results, and once the pack reaches 4.15V per cell or 12.45V, reduce the current for better and more efficient charging. ### ⭐⭐⭐⭐⭐ Best *by S***D on 19 November 2025* Best product ## Frequently Bought Together - Electronic Spices 3S 40a 12.6v 18650 Li-ion Lithium Battery Protection and Charger Bms Module Pack of 1pcs - Electronic spices BMS 18650 Lithium Battery Protection Board (3S, 20A, 12.6V) (Pack of 2) - DHRUVPRO 12V 24V to QC3.0 Fast Charge Dual USB Charging Board Step-Down Module --- ## Why Shop on Desertcart? - πŸ›’ **Trusted by 1.3+ Million Shoppers** β€” Serving international shoppers since 2016 - 🌍 **Shop Globally** β€” Access 737+ million products across 21 categories - πŸ’° **No Hidden Fees** β€” All customs, duties, and taxes included in the price - πŸ”„ **15-Day Free Returns** β€” Hassle-free returns (30 days for PRO members) - πŸ”’ **Secure Payments** β€” Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** β€” Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.vn/products/489486341-electronic-spices-3s-40a-12-6v-18650-li-ion-lithium](https://www.desertcart.vn/products/489486341-electronic-spices-3s-40a-12-6v-18650-li-ion-lithium) --- *Product available on Desertcart Vietnam* *Store origin: VN* *Last updated: 2026-05-20*