---
product_id: 723697632
title: "Smart BMS 4S 12V Lifepo4 Lithium Battery Management PCB Protection Board with Balance Leads and Wireless Bluetooth - Supports 4 Cells 12.8 Volts DIY Programmable (150A)"
brand: "radiob tech"
price: "KD 52.59"
currency: KWD
in_stock: true
reviews_count: 9
category: "Radio B Tech"
url: https://www.desertcart.com.kw/products/723697632-smart-bms-4s-12v-lifepo4-lithium-battery-management-pcb-protection
store_origin: KW
region: Kuwait
---

# 150A high continuous current Bluetooth wireless app monitoring 4S 12.8V LiFePO4 support Smart BMS 4S 12V Lifepo4 Lithium Battery Management PCB Protection Board with Balance Leads and Wireless Bluetooth - Supports 4 Cells 12.8 Volts DIY Programmable (150A)

**Brand:** radiob tech
**Price:** KD 52.59
**Availability:** ✅ In Stock

## Summary

> 🔋 Stay charged, stay connected — the smart BMS your battery deserves!

## Quick Answers

- **What is this?** Smart BMS 4S 12V Lifepo4 Lithium Battery Management PCB Protection Board with Balance Leads and Wireless Bluetooth - Supports 4 Cells 12.8 Volts DIY Programmable (150A) by radiob tech
- **How much does it cost?** KD 52.59 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.kw](https://www.desertcart.com.kw/products/723697632-smart-bms-4s-12v-lifepo4-lithium-battery-management-pcb-protection)

## Best For

- radiob tech enthusiasts

## Why This Product

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

## Key Features

- • **Precision Power Control:** Programmable overcharge, over-discharge & overcurrent protection for ultimate battery longevity
- • **Robust High-Current Handling:** Supports up to 150A continuous charge/discharge for demanding DIY and RV setups
- • **Seamless Wireless Monitoring:** Real-time battery status & cell balancing via intuitive iOS & Android apps
- • **Smart Temperature Safeguards:** Low-temp charging cutoff & internal sensor prevent thermal damage
- • **DIY-Ready with Pro Connectors:** Includes 6mm crimp ring terminals for secure 10 AWG wiring—built for serious builders

## Overview

The RadioB Tech Smart BMS 4S 12V is a fully programmable lithium battery management system designed for 4-cell LiFePO4 packs. Featuring 150A continuous current support, Bluetooth wireless monitoring via free iOS/Android apps, and advanced protections including overcharge, over-discharge, overcurrent, and temperature cutoffs, it ensures optimal battery performance and longevity. Ideal for DIY enthusiasts and high-current applications like RVs, it comes with professional-grade connectors and precise cell balancing technology.

## Description

Fully Programmable Smart BMS with Bluetooth with Android or iPhone App.Fully Functional Android app is available free.The charge and discharge using the same port.Smart BMS is designed for 4 series (4S 12V) Lithium (Lifepo4) DIY Battery Pack. 4 x 3.65 =14.6V Lifepo4 Chemistry batteryDimension Size: 138 x 102 x17mm 120A versionProtection functions : This BMS is designed with a high quality IC chip specially for lithium battery protection. High detection precision degree on over-charge, over-discharge, voltage balancing.Protection of over-discharge and over-current detections and delay times in detecting process.Protection against over-voltage when charging Low temperature charging protection a -1c.BMS with Precise SOC calculation with SOC function with automatic learning. Automatically charge battery function or static balance function for the battery system.Mobile phone software to manage the detecting the battery working status and some parameters setting over wireless bluetooth.Lithium Technology: Deep cycle lithium ion batteries have exceptional longevity since they manufacturing by LiFePO4 Cells with higher energy density, more stable performance & greater power, letting you use the battery more freely. Lifepo4 are more cost effective, so when factoring time and cost into your purchase.The protection board has various protective functions for charging and discharging, such as overcharge protection, over-discharge protection, short circuit protection and over-current protect. Choosing a protection board and applying it appropriately is vital to the longevity your batteries. It is ideal for home DIY and RV batteries with a wide rage of battery applications.Protection function descriptionOvercharge protection: When the battery is under the charging state, the voltage keeps going up. Android application links are listed on our support site

Review: Capable BMS - This is a very capable BMS. I built it up around 55ah batteries in a 2P4S configuration. Seems to do a good job of balancing during charge, maintaining about a 2-3mV max differential between cell pairs. Discharge is even until the lower end which probably indicates I have a weak cell in there. This thing is robust! I screwed up when initially connecting a switched the battery and load/charge sides. Honestly it worked just fine except indicating discharge on charge and vice versa. Corrected that mistake and everything is working well. Bluetooth connection is very handy for setup and monitoring, it even has a strong signal allowing better than 10m separation between spots on opposite sides of the house and on two different floors. The one down side for me is the three 10 AWG wires, I’d rather see a 6mm screw terminal like Overkill Solar offers, allowing for more flexible hookup options. I’m looking around for terminals to modify at some point, but for now I just crimped on a connector for 4 gauge with my hydraulic crimped. The three 10ga yield an equivalent of about 5ga, so they’re adequate. All in all a good buy.
Review: Very good BMS. - A little pricier than the other brands but there is a reason for that. It works very well and the Bluetooth connection and app is a great thing to have. Highly recommended.

## Features

- 4 Cell 12 volt - Lithium Lifepo4 - Build a high capacity LifePO4 battery from individual cells.
- BMS supports high continuous charge or discharge current. Perfect for your high current applications.
- Low Temperature Charging cutoff - Prevents damage to LifePO4 cells when the temperature is to low to charge
- Monitor pack and cell charge level with IOS app, Android app. Also monitor charge and discharge current.
- Includes Bluetooth module for wireless app connections
- Temperature sensor to monitor internal BMS and Battery Pack Cell Temperature
- Programmable over current protection---LiFePO4 battery pack will stop charging when current is over limit and will stop discharging when current over limit.
- Programmable Over-charge over-discharge protection— LiFePO4 battery pack will stop charge when its voltage reaches limit and stop discharge when its voltage reaches limit.
- Programmable Temperature protection— LiFePO4 battery pack will stop all current when its temperature reaches limit.
- 6mm Crimp Ring Terminals included for 10 AWG wires and Balance leads

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0F18MRQQ4 |
| Batteries required | No |
| Customer Reviews | 4.1 4.1 out of 5 stars (99) |
| Display Type | App on connected device |
| Included Components | Cables |
| Item Weight | 13 ounces |
| Manufacturer | Generic |
| Product Dimensions | 5.43 x 4.02 x 0.67 inches |

## Product Details

- **Brand:** RadioB Tech
- **Color:** green
- **Material:** Metal, Plastic
- **Product Dimensions:** 5.43"L x 4.02"W x 0.67"H
- **Voltage:** 12 Volts (DC)

## Images

![Smart BMS 4S 12V Lifepo4 Lithium Battery Management PCB Protection Board with Balance Leads and Wireless Bluetooth - Supports 4 Cells 12.8 Volts DIY Programmable (150A) - Image 1](https://m.media-amazon.com/images/I/717Xi7PfQNL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Capable BMS
*by J***P on September 4, 2021*

This is a very capable BMS. I built it up around 55ah batteries in a 2P4S configuration. Seems to do a good job of balancing during charge, maintaining about a 2-3mV max differential between cell pairs. Discharge is even until the lower end which probably indicates I have a weak cell in there. This thing is robust! I screwed up when initially connecting a switched the battery and load/charge sides. Honestly it worked just fine except indicating discharge on charge and vice versa. Corrected that mistake and everything is working well. Bluetooth connection is very handy for setup and monitoring, it even has a strong signal allowing better than 10m separation between spots on opposite sides of the house and on two different floors. The one down side for me is the three 10 AWG wires, I’d rather see a 6mm screw terminal like Overkill Solar offers, allowing for more flexible hookup options. I’m looking around for terminals to modify at some point, but for now I just crimped on a connector for 4 gauge with my hydraulic crimped. The three 10ga yield an equivalent of about 5ga, so they’re adequate. All in all a good buy.

### ⭐⭐⭐⭐⭐ Very good BMS.
*by M***K on May 19, 2021*

A little pricier than the other brands but there is a reason for that. It works very well and the Bluetooth connection and app is a great thing to have. Highly recommended.

### ⭐⭐⭐⭐ Updated: Seems good but cybersecurity risk
*by J***N on March 22, 2022*

This thing is solid. I have been using it for a week or so and it has had no issues. Max charged at 60 amps and drew at 25 for several hours. Zero heat up both times. The balance feature starts when .03v is showing. Not sure how effective it is on a massive 12v battery, but its there. The bluetooth feature works well and the thing overall seems great for the price. Problem? The google play store app is some sort of funky truncated version of the app it is supposed to be. You need to go to the mfgs website and download their app and then install it on your device. This is a big no-no for cybersecurity purposes. It is not vetted by the play store thus is a far greater risk. If you have a burner device to put the app on, you are golden. If not, beware. Other than that issue, i like it and may even buy another in the future. EDIT/UPDATE 1/2: the iPad app that costs $6.99 is very nice. I like it better than the android apps for sure. Plus it has to go through the app store. Your judgement on whatever security that may or may not provide, bit it is one additional layer nonetheless. Bms still working well. EDIT UPDATE 2/2: so I just got done with a solid hour and a half or so pumping 3 miles into our car. It got warm but not hot. Charging now. The iPad app is best/safest in my opinion. The longer I have this the happier I am.

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*Product available on Desertcart Kuwait*
*Store origin: KW*
*Last updated: 2026-02-13*