--- product_id: 89453767 title: "3S 12V 10A 18650 Lithium Battery Protection Board BMS Li-ion Charger Protection Module Anti-Overcharge/Over-Discharge/Over-Current/Short Circuit 3Pcs" brand: "comidox" price: "AR$27761" currency: ARS in_stock: true reviews_count: 8 category: "Comidox" url: https://www.desertcart.com.ar/products/89453767-3s-12v-10a-18650-lithium-battery-protection-board-bms-li store_origin: AR region: Argentina --- # 10A max discharge current 12.6V max charge voltage -40 to +50°C operating temp 3S 12V 10A 18650 Lithium Battery Protection Board BMS Li-ion Charger Protection Module Anti-Overcharge/Over-Discharge/Over-Current/Short Circuit 3Pcs **Brand:** comidox **Price:** AR$27761 **Availability:** ✅ In Stock ## Summary > 🔌 Power up smart, stay protected smarter! ## Quick Answers - **What is this?** 3S 12V 10A 18650 Lithium Battery Protection Board BMS Li-ion Charger Protection Module Anti-Overcharge/Over-Discharge/Over-Current/Short Circuit 3Pcs by comidox - **How much does it cost?** AR$27761 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.com.ar](https://www.desertcart.com.ar/products/89453767-3s-12v-10a-18650-lithium-battery-protection-board-bms-li) ## Best For - comidox enthusiasts ## Why This Product - Trusted comidox brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Compact Powerhouse:** Slim 50x16x1mm design fits seamlessly into high-integration, space-conscious projects. - • **High-Quality MOSFETs:** Equipped with premium VISHAY, AOS, IR MOSFETs ensuring durability and efficiency. - • **Versatile Compatibility:** Perfect for 3-series 18650 or polymer lithium battery packs powering everything from LED lights to solar street lamps. - • **Long-Lasting Reliability:** Engineered for over 30,000 hours of operation with ultra-low quiescent current (<6μA) to maximize battery life. - • **Precision Battery Safety:** Advanced overcharge, over-discharge, over-current & short circuit protection for ultimate peace of mind. ## Overview The Comidox 3S 12V 10A Lithium Battery Protection Board is a compact, high-performance BMS module designed for 3-series 18650 or polymer lithium batteries. It safeguards your battery pack with multi-layer protections including overcharge, over-discharge, over-current, and short circuit, while supporting up to 10A discharge current and operating reliably across a wide temperature range. Ideal for professional DIYers and tech-savvy users upgrading 12V electronic devices, this module ensures safety, longevity, and efficiency in your power solutions. ## Description Specifications: 3 strings: 3 18650 batteries or polymer lithium batteries in series Polymer battery rated voltage: 10.8V Rated voltage of 18650 or 3.7V lithium battery: 11.1V After the lithium battery is fully charged, the voltage is 12.6V. Maximum discharge current limit: 10A Overcharge voltage range: 4.25-4.35v±0.05v Over-discharge voltage range: 2.3-3.0v±0.05v Maximum working current: 5-8A Maximum instantaneous current: 9-10A Quiescent current: less than 6uA Internal resistance: less than 60mΩ Working temperature: -40---+50 °C Storage conditions: -40-- +80 ° C Effective life: more than 30,000 hours Size: 50*16*1.0mm /1.96*0.62*0.039inch Note: The selected protection board current should not be less than the controller current limit of the product you are using. Lithium battery should be charged with lithium battery special charger, do not use lead-acid battery charger, lead-acid charging may have high voltage breakdown protection board MOS tube, resulting in protection board overcharge is not protected. Charger voltage setting: Use your battery pack number *4.2V This is the charging voltage of the non-ferrous lithium battery. The charging voltage of the iron-lithium battery is the number of battery strings *3.60V, and the charging current standard is 0.2 times of the capacity. We highly appreciate all customers opinions to improve the selling, also if anything you unsatisfied, please contact us for probable best solution. Package Includes: 3Pcs Review: Did as described...Great! - No issues at all. Made 3 battery packs using 3, 18650 cells. These prevent overcharging, and shut down when voltage is low. Exactly what I needed. +++++ Review: Apply charging voltage on your first use to work. - Worked wonders! Converted our nursing facilities feeding tube machines that works on 12v 2amp lead acid batteries to 18650 lithium batteries..bench tested for a week draining the diy battery pack and charging it back multiple times in the our baxter infusystem feeding tube machines before sending it back to the floor for patient use..5 done, 10 more units to go.. just do remember they need to be charged 1st before its going to work.. its for safety reason they did this for it to work the very first time..there will be no voltage outputted if you don’t charge this on your first use so be aware.. ## Features - The power range described is applicable to the following products: vacuum cleaner, massager battery pack, LED light backup power supply, 12V electronic products, solar street light battery pack, monitoring standby power supply, etc. - With overcharge, over discharge, over current, short circuit and other protection functions, for a variety of shapes of various shapes 3.7V lithium battery. - High quality MOSFETs such as VISHAY, AOS, IR, etc., FR-4 low temperature coefficient sheet, well designed and tested. - It is small in size and suitable for many applications requiring high integration and low cost. It can meet various performance requirements and ensure the absolute safety and reliability of the battery pack. - This protection board can not be used for iron ion polymer battery, hand drill battery pack, electric fish battery pack, electric bicycle battery pack, 2 pieces and 24V series, 775 (4A) or above motor, 1W fisheye LED lamp. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B07J9NXQ6W | | Best Sellers Rank | #163,784 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #659 in Power Converters | | Brand | Comidox | | Color | Black Blue | | Customer Reviews | 4.2 out of 5 stars 226 Reviews | | Input Voltage | 12 Volts | | Item Dimensions | 1.97 x 5.91 x 3.94 inches | | Item Height | 10 centimeters | | Item dimensions L x W x H | 1.97 x 5.91 x 3.94 inches | | Manufacturer | Comidox | | Model Number | CP219 | | Output Voltage | 11.1 Volts | | Plug Format | Type A, Type B | | Plug Type | Type A, Type B | | UPC | 661083377344 | ## Product Details - **Brand:** Comidox - **Color:** Black Blue - **Input Voltage:** 12 Volts - **Item dimensions L x W x H:** 1.97 x 5.91 x 3.94 inches - **Output Voltage:** 11.1 Volts ## Images ![3S 12V 10A 18650 Lithium Battery Protection Board BMS Li-ion Charger Protection Module Anti-Overcharge/Over-Discharge/Over-Current/Short Circuit 3Pcs - Image 1](https://m.media-amazon.com/images/I/619KvUZFD5L.jpg) ## Questions & Answers **Q: Will this bms work with a 3s5p 18650 battery pack?** A: it should work, but it sounds like you might want to be drawing significant amperage, and these will limit you to 10 amps, you should try not to need more than 5 amps through these if it is continuous current. if you are going to do this with these BMS , you will want to make sure the batteries all perform nearly identically, because charging will stop when one of the sets of 5p reaches 4.2v, so if one cell out of those 5 charged to 4.2v while the other 4 are still down at 3.9v, you will never get maximum potential out of the 4 cells, because they will all stop charging every time. if this offset becomes large enough, you could have one cell charging the other cells "balancing" to have the same voltage, this could produce more problems down the road after several cycles. i only like to use them with 3 cells in series per BMS. i have considered using 2 or 3 bms in parallel to make a larger bank, but i didn't want to put more than one cell per terminal on the BMS **Q: How would i adjust the voltage for use with 1.5v batteries such as aa or aaas?** A: It is not the battery form factor that determines the compatibility. It is the chemistry. These will work with 3 rechargeable Lithium Ion or Lithium Polymer batteries (3.7V nominal, 4.2V totally charged) in series. I am using it with 12 cells of 21700 batteries in a 3S4P configuration. A pack of 3 AA or AAA Li-Ion or Li-Po batteries should work just fine. **Q: What is the output voltage and amperage from P+ and P-?** A: Specifications: 3 strings: 3 18650 batteries or polymer lithium batteries in series Polymer battery rated voltage: 10.8V Rated voltage of 18650 or 3.7V lithium battery: 11.1V After the lithium battery is fully charged, the voltage is 12.6V. Maximum discharge current limit: 10A Overcharge voltage range: 4.25-4.35v±0.05v Over-discharge voltage range: 2.3-3.0v±0.05v Maximum working current: 5-8A Maximum instantaneous current: 9-10A Quiescent current: less than 6uA Internal resistance: less than 60mΩ Working temperature: -40---+50 °C Storage conditions: -40-- +80 ° C Effective life: more than 30,000 hours **Q: Is there a minimum output to keep these alive? my application only draws about 60ma. some bms units require more.** A: I drew 40 mA, and it shut off to protect the batteries exactly as it was supposed to. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Did as described...Great! *by E***. on July 21, 2025* No issues at all. Made 3 battery packs using 3, 18650 cells. These prevent overcharging, and shut down when voltage is low. Exactly what I needed. +++++ ### ⭐⭐⭐⭐⭐ Apply charging voltage on your first use to work. *by B***H on February 27, 2021* Worked wonders! Converted our nursing facilities feeding tube machines that works on 12v 2amp lead acid batteries to 18650 lithium batteries..bench tested for a week draining the diy battery pack and charging it back multiple times in the our baxter infusystem feeding tube machines before sending it back to the floor for patient use..5 done, 10 more units to go.. just do remember they need to be charged 1st before its going to work.. its for safety reason they did this for it to work the very first time..there will be no voltage outputted if you don’t charge this on your first use so be aware.. ### ⭐⭐⭐⭐ Requires charge voltage to enable output *by B***C on December 27, 2020* Works well but has no output until a voltage is applied to the input/output terminals. Charge current is pulsed so if you use this on a solar setup, you'll need a hefty bulk capacitor to store the charge current energy or it won't charge the Li-Ion cells correctly. Works great as a BMS if applied correctly. ## Frequently Bought Together - Comidox 3S 12V 10A 18650 Lithium Battery Protection Board BMS Li-ion Charger Protection Module Anti-Overcharge/Over-Discharge/Over-Current/Short Circuit 3Pcs - DIYhz Push Button Switch, Self-Locking Mini Switches Latching 10mm Round DC24V 0.5A Black Cap 5PCS - DIYhz GX12 2 Pins Panel Metal Mount Circular Metal Aviation Connector Adapter Male Female Plug Socket with Waterproof Cap (5 Pcs) --- ## 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.com.ar/products/89453767-3s-12v-10a-18650-lithium-battery-protection-board-bms-li](https://www.desertcart.com.ar/products/89453767-3s-12v-10a-18650-lithium-battery-protection-board-bms-li) --- *Product available on Desertcart Argentina* *Store origin: AR* *Last updated: 2026-05-21*