---
product_id: 98712686
title: "5PCS 2S 7.4V 8.4V 8A 18650 Charger PCB BMS Protection Board for Li-ion Lithium Battery Cell"
brand: "anmbest"
price: "AR$32943"
currency: ARS
in_stock: true
reviews_count: 5
url: https://www.desertcart.com.ar/products/98712686-5pcs-2s-7-4v-8-4v-8a-18650-charger-pcb
store_origin: AR
region: Argentina
---

# 50000 Hours Lifespan 9V Input/Output Voltage 8A Current Rating 5PCS 2S 7.4V 8.4V 8A 18650 Charger PCB BMS Protection Board for Li-ion Lithium Battery Cell

**Brand:** anmbest
**Price:** AR$32943
**Availability:** ✅ In Stock

## Summary

> 🔌 Power Up Your Life with Confidence!

## Quick Answers

- **What is this?** 5PCS 2S 7.4V 8.4V 8A 18650 Charger PCB BMS Protection Board for Li-ion Lithium Battery Cell by anmbest
- **How much does it cost?** AR$32943 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/98712686-5pcs-2s-7-4v-8-4v-8a-18650-charger-pcb)

## Best For

- anmbest enthusiasts

## Why This Product

- Trusted anmbest brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **User-Friendly Design:** Follow the clear wiring diagram for hassle-free installation and optimal performance.
- • **Low Power Consumption:** Designed with a low standby current to maximize battery efficiency.
- • **Precision Engineering:** High-accuracy voltage detection ensures your devices are always in safe hands.
- • **Ultimate Safety First:** Experience peace of mind with over-discharge, overcurrent, overcharge, and short circuit protection.
- • **Versatile Applications:** Perfect for a variety of lithium battery setups, from massagers to solar lights.

## Overview

The 5PCS 2S 7.4V 8.4V 8A 18650 Charger PCB BMS Protection Board is engineered for high accuracy and durability, boasting a lifespan of over 50,000 hours. It features multiple safety protections, low standby current, and is suitable for various lithium battery applications, making it an essential component for any tech-savvy user.

## Description

2S 8A Li-ion Lithium Battery 7.4V 8.4V 18650 Charger Protection Board Module is a small PCB mounted Li-ion Lithium Battery charger protection module. This small and smart battery charger protection module comes with the various features like Short circuit protection, Overcharge protection, Over-discharge protection, Overcurrent protection. It is very easy to install and convenient to use in all your DIY portable projects.   Specifications:  Charging Voltage: 8.4V-9V Overcharge Voltage Range: 4.25V-4.35V plus or minus 0.05V Overpressure Voltage Range: 2.3V-3.0V plus or minus 0.05V Upper Limit Operating Current: 8A Upper Limit Instantaneous Current: 16A Quiescent Current: less than 10uA Internal Resistance: less than 300mΩ Effective Life: more than 50,000 hours Operating Temperature: -40- +50 Celsius Storage Conditions: -40- +80 Celsius Short circuit protection: Can be protected, charge recovery required Size: 41mm x 8mm x 2.2mm/ 1.61″ ×0.31″×0.09″(L x W x H) Attention:  Strictly according to the diagram wiring: B+: Battery V+ Positive, B-: Battery V- Negative, P+: Output / Charging V+, P-: Output / Charging V-, MB: The connection point between the batteries.Otherwise it will cause damage to the chip.  Do not mix the good battery and poor battery to use.  The internal resistance of 3 battery capacity are closer will be better.  Tips: the product must be connected to a 8.4V charging voltage through p+ and p- before it will create voltage on pads.Or you can activate this BMS by momentarily shorting b- and p-. Package inlcuded:  5x 2S lithium Battery Protection Board

## Features

- HIGH-ACCURACY, HIGHLY DURABLE: High-accuracy voltage detection circuit, fine workmanship and durable, Effective life greater than 50000 hours.
- MULTIPLE PROTECTION: Over-discharge protection, overcurrent protection, overcharge protection, short circuit protection; A combination of 4 safety features that work together to provide ultimate protection for your devices, your chargers and most importantly:you.
- LOW STANDBY CURRENT: MOS transistor can control the battery charge and discharge, low standby current consumption.
- WIDELY APPLICATIONS: Use for variety of capacities and various shapes 3.7V lithium batteries,Massager battery pack, LED light backup power supply, solar street light battery pack, monitor standby power supply, etc.
- ATTENTION: Strictly according to the diagram wiring: B+: Battery V+ Positive, B-: Battery V- Negative, P+: Output / Charging V+, P-: Output / Charging V-, MB: The connection point between the batteries.Otherwise it will cause damage to the chip. Do not mix the good battery and poor battery to use. The internal resistance of 3 battery capacity are closer will be better.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Battery Charge Time | 50000 Hours |
| Current Rating | 8 Amps |
| Input Voltage | 9 Volts |
| Output Voltage | 9 Volts (DC) |
| Item Weight | 0.63 Ounces |
| Item Dimensions D x W x H | 0.09"D x 0.31"W x 1.61"H |
| Color | Multicolor |

## Product Details

- **Brand:** ANMBEST
- **Color:** Multicolor
- **Item Weight:** 0.63 Ounces
- **Output Voltage:** 9 Volts (DC)
- **Input Voltage:** 9 Volts

## Images

![5PCS 2S 7.4V 8.4V 8A 18650 Charger PCB BMS Protection Board for Li-ion Lithium Battery Cell - Image 1](https://m.media-amazon.com/images/I/71B0LWnJLmL.jpg)

## Available Options

This product comes in different **Style** options.

## Questions & Answers

**Q: What is the maximum charge current? It started pulling 4A to charge a 2S pack of 18650s.**
A: The description says 8 Amps is the upper current limit.  If you have 2 cells in 2s configuration, it seems a little hot because each will charge at 4 amps (assuming a drain of 4 amps from a 9v supply, you get 36 watts dividedvinto 2 cells). Rule of thumb is charge no faster than the discharge rating.  E.g. a 2400maH cell has a nominal charge rate of 2400ma.   So 4 cells in 2s config would be okay with that current.

 You might also check the supply voltage.  It must be over 9v AFAIK, but not 12v or the circuit will shunt a lot of extra power somewhere.   I hooked mine to a 9v wall wart that only puts out 1amp.  Running 2 years almost with  4 cells in 2s, only charged it 6 times or so.

**Q: Can I wire 6 batteries to this in such a way that all the voltages are the same at each point? (assuming matched batteries.)**
A: In theory, it can be used for 2 parallel 3 series battery packs. It should be noted that the battery voltage should match. But we don't recommend using it like this.

**Q: Do these keep the cells balanced?**
A: Yes

**Q: How are you suppose to charge the batteries with this? Do you just hook it up to a 12v wall plug?**
A: It is recommended that you charge the battery with a 12.6 lithium battery charger.The full voltage of the 3-cell lithium battery is 12.6V, and it cannot be fully charged by directly charging with the 12V wall plug.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Nice BMS for 2S
*by N***. on January 25, 2025*

So far, so good. Made a pack of 2x18650 in 2S configuration.voltage initially was zero, but just plugged in the charger, and it activated. Voltage output was about 8.14v (because the batteries were almost fully charged). Plugged in charger, light on charger was Red, then after about 1 minute it switched to 10.3v and the charger light went Green. Which is what I expected. Works great so far!

### ⭐ 5 stars when they work.  3 stars awarded. 2 out of 5 were dead
*by S***R on March 12, 2024*

These little devices do exactly what they are supposed to - when they work. I received 5 of them and the first 2 did not function. Because I am stubborn, I did not give up and tried the remaining 3 and they functioned perfectly.These are really great when they work to protect the potential little battery bombs we use everywhere. Not so impressed with the quality control of the delivered devices and will buy from elsewhere when I need more.UPDATE: I lowered my rating to one star since out of the 3 that “worked” one of them would cut off the output voltage every 100mS when connected to a perfectly charged cell with a very light load. So 2 were initially dead, one is unusable with weird operation, and I certainly don’t trust the remaining 2 of the five I received, even though they seem to work - for now.

### ⭐⭐⭐⭐⭐ Tiny and solid build, works perfectly to maintain series pairs of Li-Ion battery (7.4v nominal)
*by R***) on February 11, 2019*

I picked this to test because of the High-current (8A max) output spec and simple design for isolating the batteries from external circuitry. It is tiny, fits easily in the curved space between two 18650 cells, or in the center of a block of four. My test build has the board shrink tubed between two cells. No problem with heat so far, but have not tested full load, or low-voltage cutoff situations.The charging circuit seems to work flawlessly. Input and output are just two wires (V+ and V-). Mine charges to approx 8.45v when line voltage is up to 9v (following specifications) and discharges when there is a load. This was using a 9v-2amp wall brick charging the two Li-Ion cells and also operating 24v LED from a boost circuit. Batteries fill in whatever the charger is unable to supply and keep the uninterrupted operation of the lights.I hope others can contribute information about designs to put these in series/parallel banks for 14.4 volt or higher for solar-PV energy storage, or maybe where to wire a charge indicator light to identify fault cells..

## Frequently Bought Together

- Anmbest 5PCS 2S 7.4V 8.4V 8A 18650 Charger PCB BMS Protection Board for Li-ion Lithium Battery Cell
- KOOBOOK 10pcs 3A BMS Protection Board with Solder Belt for 1S 3.7V 18650 Li-ion Lithium Battery Cell Kit

---

## 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/98712686-5pcs-2s-7-4v-8-4v-8a-18650-charger-pcb](https://www.desertcart.com.ar/products/98712686-5pcs-2s-7-4v-8-4v-8a-18650-charger-pcb)

---

*Product available on Desertcart Argentina*
*Store origin: AR*
*Last updated: 2026-02-19*