---
product_id: 65785075
title: "Battery Monitor Auto Car Motor 12V Battery Voltage Tester Free Mobile APP Real Time"
brand: "ewelingk"
price: "9190 som"
currency: KGS
in_stock: true
reviews_count: 8
url: https://www.desertcart.kg/products/65785075-battery-monitor-auto-car-motor-12v-battery-voltage-tester-free
store_origin: KG
region: Kyrgyzstan
---

# Bluetooth 4.0 real-time app sync 12V voltage precision ±0.03V Built-in short-circuit & reverse polarity protection Battery Monitor Auto Car Motor 12V Battery Voltage Tester Free Mobile APP Real Time

**Brand:** ewelingk
**Price:** 9190 som
**Availability:** ✅ In Stock

## Summary

> 🔋 Drive smarter, not harder — your car’s health in your pocket!

## Quick Answers

- **What is this?** Battery Monitor Auto Car Motor 12V Battery Voltage Tester Free Mobile APP Real Time by ewelingk
- **How much does it cost?** 9190 som with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.kg](https://www.desertcart.kg/products/65785075-battery-monitor-auto-car-motor-12v-battery-voltage-tester-free)

## Best For

- ewelingk enthusiasts

## Why This Product

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

## Key Features

- • **Robust Data Storage & Sync:** Stores up to 35 days of battery data offline, syncing automatically when back in Bluetooth range.
- • **Real-Time Battery Health Alerts:** Stay ahead with instant mobile notifications on battery, cranking, and charging issues.
- • **Comprehensive System Diagnostics:** Automatically checks your vehicle’s cranking and alternator charging system every engine start.
- • **Universal Compatibility & Safety:** Works with all 12V vehicle batteries and protects against short circuits and reverse connections.
- • **Seamless Bluetooth 4.0 Connectivity:** Effortlessly sync data with your smartphone for on-the-go monitoring via a free iOS & Android app.

## Overview

This 12V Battery Monitor offers precise voltage measurement with ±0.03V accuracy and real-time Bluetooth 4.0 connectivity to a free mobile app. It continuously monitors your car’s battery, cranking, and charging systems, sending instant alerts for any abnormalities. Designed for universal 12V vehicle compatibility, it features built-in short-circuit and reverse polarity protection, stores up to 35 days of data offline, and automatically syncs when in range, empowering proactive vehicle maintenance for busy professionals.

## Description

Prodcut Description:Installed in the car battery Real-time Monitoring throughReceive notification of battery conditions when enter Bluetooth rangeAlert users if charge is lowCheck vehicle cranking system automatically while engine is startingCheck charging system (alternator)List the time of each drivingAlert mobile phone if some data abnormalShort-circuit and reverse connection protectionData stored in battery monitor up to 35 days if out of syncAutomatic synchronization when enter Bluetooth rangeCompatible with all 12-volt vehicle batteries Review historical data graphically Engine starting detect automaticallyData stored in battery monitor up to 35 days if out of syncProtection of short-circuit and reverse connectionFree app for both iOS & AndroidSpecification:Input Voltage: 6~20VAverage Current: 1mAOperating Temperature: -40ºC~90ºCPhysical Dimensions: 55mm*35mm*16mmVoltage Accuracy(9-16V): +/-0.03VShort-circuit Protection?Built inReverse Connection Protection: Built inBluetooth: 4.0Bluetooth Name: Battery MonitorApp Keyword: BM2Available: Android: 4.3 and later, IOS 7.1 and LaterSuitable for:DIY usersBattery service stationGarage/workshopTool storeVehicle/Battery manufacturerThe auction include:1 × Battery Monitor1 x User's Manual??

## Features

- This product is used to monitor the auto battery, cranking system and charging system.
- After install it to the battery, the mobile can connect it via Bluetooth 4.0.
- When some problems happen in battery, cranking and charging system, it can send notification alert to the user.
- The user also can test and review the rip record via app.
- Your car's battery manager

## Product Details

- **Brand:** eWelingk
- **Power Source:** Battery Powered
- **Style:** Modern
- **Color:** Black, Red
- **Min. Operating Voltage:** 6 Volts

## Images

![Battery Monitor Auto Car Motor 12V Battery Voltage Tester Free Mobile APP Real Time - Image 1](https://m.media-amazon.com/images/I/61zlF00UPBL.jpg)
![Battery Monitor Auto Car Motor 12V Battery Voltage Tester Free Mobile APP Real Time - Image 2](https://m.media-amazon.com/images/I/51m+8twffDL.jpg)
![Battery Monitor Auto Car Motor 12V Battery Voltage Tester Free Mobile APP Real Time - Image 3](https://m.media-amazon.com/images/I/61WXOKgFgcL.jpg)
![Battery Monitor Auto Car Motor 12V Battery Voltage Tester Free Mobile APP Real Time - Image 4](https://m.media-amazon.com/images/I/51go0MYCOiL.jpg)
![Battery Monitor Auto Car Motor 12V Battery Voltage Tester Free Mobile APP Real Time - Image 5](https://m.media-amazon.com/images/I/61yNenm6HSL.jpg)

## Questions & Answers

**Q: do this come in a 48v version?**
A: Hello, sorry, this item can only work with 12V battery.

**Q: How many amps can this unit handle?**
A: This isn’t to deal with current. This is measuring voltage.

**Q: I already have one of these installed on my 2 rv house batteries, can i add another on my chassis battery and monitor it on the same phone?**
A: There are 2 apps (iPhone) for monitoring. The free one only connects to one. I have three banks to monitor simultaneously so I gladly paid $10 for the 4 bank monitor app. 

I have a love / hate relationship with it. It could be awesome. The 24 hour graphs of voltage readings at 2 minute intervals are incredibly powerful in knowing how your banks are responding to loads and charging. I can count the number of times per hour my refrigerator or furnace kicks in, and see the effect of partly cloudy skies, and much much more. 

But instead I have to beat it into submission often by killing it and restarting it. The app is very amateurish, probably written by a junior programmer with little understanding of our needs and little guidance. I wish they could open source details about the meters and let the world make a better app.

**Q: does the unit constantly eminate bluetooth signal / electromagnetic radiation?**
A: Yes, only about a 20ft radius , where did you come up with the radiation stuff

## Customer Reviews

### ⭐⭐⭐⭐⭐ I bought a second one for another vehicle
*by K***R on October 26, 2023*

I have used this for years on my RV battery bank. I decided to get one for the Excursion I use to tow it because it was having problems with the battery discharging over time. This way I can check it when I'm near the vehicle without having to get in the car and crank the engine. Love it!

### ⭐ SHORTED BATTERIES
*by R***G on May 24, 2025*

After 3 days unit shorted out my LiFePO4 Batteries. Liked it for 3 days will buy another manufacturer’s unit. If

### ⭐⭐⭐⭐⭐ Great for diagnosis from your phone
*by B***E on July 11, 2024*

It catches dips in power sampling pretty fast

## Frequently Bought Together

- Bluetooth Battery Monitor Auto Car Motor 12V Battery Voltage Tester Wireless Free Mobile APP Real Time
- Sanuke 10pcs 1/0 AWG-3/8 Battery Lugs, UL Listed Heavy Duty Wire Lugs Ring Terminal 0 Guage terminals Battery Cable Ends/Terminal Connectors with 3:1 Heat Shrink Tubing
- 10pcs 1 AWG-3/8" Battery Lugs,Copper Wire Lugs,UL Listed Heavy Duty Battery Cable Ends,Tubular Ring Terminals,AWG Crimp Wire Ring Lugs,Battery Terminal Connectors with 3:1 Heat Shrink Tubing

---

## 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.kg/products/65785075-battery-monitor-auto-car-motor-12v-battery-voltage-tester-free](https://www.desertcart.kg/products/65785075-battery-monitor-auto-car-motor-12v-battery-voltage-tester-free)

---

*Product available on Desertcart Kyrgyzstan*
*Store origin: KG*
*Last updated: 2026-02-24*