---
product_id: 450296329
title: "Waterproof Battery Monitor12v 24v 36v 48v 60v 72v ,Car Motorcycle Golf cart Battery Meter Digital Battery Capacity Remaining Capacity Percentage Tester with Buzzer Alarm and Temperature（Bule）"
brand: "supnova"
price: "250 kr"
currency: DKK
in_stock: true
reviews_count: 8
category: "Supnova"
url: https://www.desertcart.dk/products/450296329-waterproof-battery-monitor12v-24v-36v-48v-60v-72v-car-motorcycle
store_origin: DK
region: Denmark
---

# Power-off Memory Voltage Range: 7-100V IPX7 Waterproof Waterproof Battery Monitor12v 24v 36v 48v 60v 72v ,Car Motorcycle Golf cart Battery Meter Digital Battery Capacity Remaining Capacity Percentage Tester with Buzzer Alarm and Temperature（Bule）

**Brand:** supnova
**Price:** 250 kr
**Availability:** ✅ In Stock

## Summary

> 🔍 Never Lose Power Again! - Your Battery's Best Friend

## Quick Answers

- **What is this?** Waterproof Battery Monitor12v 24v 36v 48v 60v 72v ,Car Motorcycle Golf cart Battery Meter Digital Battery Capacity Remaining Capacity Percentage Tester with Buzzer Alarm and Temperature（Bule） by supnova
- **How much does it cost?** 250 kr with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.dk](https://www.desertcart.dk/products/450296329-waterproof-battery-monitor12v-24v-36v-48v-60v-72v-car-motorcycle)

## Best For

- supnova enthusiasts

## Why This Product

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

## Key Features

- • **Smart Alerts:** Buzzer alarms for low/high voltage ensure you're always informed.
- • **Robust Protection:** IPX7 waterproof and dustproof for all environments.
- • **User-Friendly Setup:** Easy installation with included adhesive and clear wiring.
- • **Precision Monitoring:** Stay ahead with real-time battery capacity tracking.
- • **Versatile Compatibility:** Works seamlessly with various battery types (lead-acid, lithium).

## Overview

The Waterproof Battery Monitor is a versatile digital tester designed for a wide range of applications, including electric motorcycles, golf carts, and marine vehicles. It supports multiple battery types and voltages, features a waterproof design, and includes smart alerts for optimal performance monitoring.

## Description

Buy SUPNOVA Waterproof Battery Monitor12v 24v 36v 48v 60v 72v ,Car Motorcycle Golf cart Battery Meter Digital Battery Capacity Remaining Capacity Percentage Tester with Buzzer Alarm and Temperature（Bule）: Battery Testers - desertcart.com ✓ FREE DELIVERY possible on eligible purchases

Review: Good non-shunt battery meter - Bought this to monitor the voltage on my 24V trolling motor system real-time. I set it up according to the the directions... Mode1: P 24 (lead acid 24V), Mode2: Off (No time-out on display), Mode3: 21.6, 25.7 (0%, 100% SoC), Mode4: 22.0 (low voltage alarm), Mode5: 30 (did not change), Mode6: Off (no temperature display), Mode7: 29.3 (High voltage alarm). It works exactly as stated. Note there is a small amount of error in the voltage reading verses my $300 Innova meter, but it's pretty insignificant. A few noteworthy items: 1) This predicts battery state of charge (SoC) purely as a function of voltage. It uses a linear scale with the voltages setup in mode3. 0% at the low voltage and 100% at the high voltage. Unfortunately lead acid battery SoC curves aren't really linear vs voltage, but it gives you an idea of where you are at. Also as the voltage fluctuates with device loads, the SoC reading will fluctuate right along with it. For me it's not a problem, I only really pay any attention to the SoC% (and the Voltage readings for that matter) after a settling period with the trolling motor not being used. 2) The device uses power even when the display is off. With the display on and the light on, the unit consumes ~9mA, with the display & light off it consumes ~1mA. This might not be a problem depending on your application, but I store this boat over the winter and don't want any additional parasitic loads or to have to disconnect the batteries every time, so I installed a water proof switch inline with this device to truly shut it down when my boat is not in use. 3) The display is quite small. I've not used it on the boat yet, so I can't comment on how easy it is to read mounted 6 ft away (near my feet) in bright sun light. I'll update this later. Update: Installed on the boat and can easily be read from 5-6ft away in most lighting conditions. Note that the glare of the full sun can make any display hard to read. 4) The alarm can be silenced by pressing the mode button for less than 1 second. 5) The temperature display is only available in Degrees C. I live in the US and prefer Degrees F. I shut off this temperature display, because with my 24V system and the temperatures I mainly use the boat (20-30C) combined with the small display size, I'm concerned it could easily be confused with the Voltage reading. How water proof is it? Time will tell! It will get a full test mounted near the bow of my boat. I'll update this review if the unit fails due to water intrusion. I like the fact that it can be set up for different types of batteries. I plan to upgrade my boat in the future to LiFeP04 batteries and will only have to make a small configuration change to this unit.
Review: Follow the instructions for your type of battery, and it will work well - At first I had trouble setting up this battery monitor because I couldn't find the number of strings for my LiFeP04 batteries. Without this information it will give you the voltage reading but will just always show 100% charge. I finally found the correct number of strings for my batteries, and this meter works fine. It is very bright, even on a sunny day. It seems very accurate. The instructions are complete, and needs to be followed one step at a time.

## Features

- · APPLICATION --- The battery testers can be used for testing battery voltage and capacity for electric motorcycle, motorcycle，golf cart,automotive , car, marine, RV, boat, etc.
- · APPLICABLE BATTERY --- SUPNOVA digital battery monitor is suitable for 7-100V (12v 24v 36v 48v 60v 72v 84v) Ternary lithium battery, lead-acid battery, lithium iron phosphate battery. Default 12 volt lead acid battery .
- · PROTECTION ---·Fully closed shell and IPX7 waterproof ,dustproof it can be used for indoor and outdoor, input reverse connection protectionIt does not generate heat even when used at high voltages for a long time.
- INSTALLATION ---The red wires for the positive and the black wires for the negative. It can use Double-sided adhesive we provided stick the back on the product .The wires length are 15.75 inches .
- Buzzer Alarm&Ttemperature--- The battery monitor can set low and high voltage buzzer alarm and short press"M"key can switch voltage and temperature（Celsius).
- Power-off Memory--The battery tester with power-off memory function,it can retain settings when power is removed.

## Product Details

- **Brand:** SUPNOVA
- **Power Source:** Dc
- **Style:** Digital
- **Color:** Blue
- **Item Weight:** 0.63 Ounces

## Images

![Waterproof Battery Monitor12v 24v 36v 48v 60v 72v ,Car Motorcycle Golf cart Battery Meter Digital Battery Capacity Remaining Capacity Percentage Tester with Buzzer Alarm and Temperature（Bule） - Image 1](https://m.media-amazon.com/images/I/41Mg6IuILzL._SS80_.jpg)
![Waterproof Battery Monitor12v 24v 36v 48v 60v 72v ,Car Motorcycle Golf cart Battery Meter Digital Battery Capacity Remaining Capacity Percentage Tester with Buzzer Alarm and Temperature（Bule） - Image 2](https://m.media-amazon.com/images/I/41Mg6IuILzL.jpg)
![Waterproof Battery Monitor12v 24v 36v 48v 60v 72v ,Car Motorcycle Golf cart Battery Meter Digital Battery Capacity Remaining Capacity Percentage Tester with Buzzer Alarm and Temperature（Bule） - Image 3](https://m.media-amazon.com/images/I/61WkrKye7bL._SS80_.jpg)
![Waterproof Battery Monitor12v 24v 36v 48v 60v 72v ,Car Motorcycle Golf cart Battery Meter Digital Battery Capacity Remaining Capacity Percentage Tester with Buzzer Alarm and Temperature（Bule） - Image 4](https://m.media-amazon.com/images/I/61WkrKye7bL.jpg)
![Waterproof Battery Monitor12v 24v 36v 48v 60v 72v ,Car Motorcycle Golf cart Battery Meter Digital Battery Capacity Remaining Capacity Percentage Tester with Buzzer Alarm and Temperature（Bule） - Image 5](https://m.media-amazon.com/images/I/61m-2QJ6mAL._SS80_.jpg)

## Available Options

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

## Questions & Answers

**Q: What voltage equals 100% charge?**
A: This depends on what kind of battery you are using, such as 12V lead-acid battery 13.2V full charge, Terpolymer lithium battery 4.2V full charge, lithium iron phosphate battery about 3.4V full charge, this parameter can be seen from the battery or charger. Thanks for your questons.

**Q: Mine doesn't show 100% charge when the batteries are fully charged.   I know the batteries are good and at 100%.  I have a 36 volt system.  Help?**
A: Dear Customer,you can use Moedel 3--Custom Settings,for example,the voltage of battery is 39.6v when be fully charged and the voltage is 32.4v when the battery is dead.

**Q: what setting do i use for a marine AGM battery ?**
A: you can set it follow mode 3(custom Settings) the left number is the lowest voltage and the right number is the highest voltage.thank you for your question.

**Q: How many amps does this unit use while running ?**
A: The operation of this product has nothing to do with current, only related to voltage, and the use range is 7-100V.Thank you for   your questions.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Good non-shunt battery meter
*by Y***R on April 8, 2024*

Bought this to monitor the voltage on my 24V trolling motor system real-time. I set it up according to the the directions... Mode1: P 24 (lead acid 24V), Mode2: Off (No time-out on display), Mode3: 21.6, 25.7 (0%, 100% SoC), Mode4: 22.0 (low voltage alarm), Mode5: 30 (did not change), Mode6: Off (no temperature display), Mode7: 29.3 (High voltage alarm). It works exactly as stated. Note there is a small amount of error in the voltage reading verses my $300 Innova meter, but it's pretty insignificant. A few noteworthy items: 1) This predicts battery state of charge (SoC) purely as a function of voltage. It uses a linear scale with the voltages setup in mode3. 0% at the low voltage and 100% at the high voltage. Unfortunately lead acid battery SoC curves aren't really linear vs voltage, but it gives you an idea of where you are at. Also as the voltage fluctuates with device loads, the SoC reading will fluctuate right along with it. For me it's not a problem, I only really pay any attention to the SoC% (and the Voltage readings for that matter) after a settling period with the trolling motor not being used. 2) The device uses power even when the display is off. With the display on and the light on, the unit consumes ~9mA, with the display & light off it consumes ~1mA. This might not be a problem depending on your application, but I store this boat over the winter and don't want any additional parasitic loads or to have to disconnect the batteries every time, so I installed a water proof switch inline with this device to truly shut it down when my boat is not in use. 3) The display is quite small. I've not used it on the boat yet, so I can't comment on how easy it is to read mounted 6 ft away (near my feet) in bright sun light. I'll update this later. Update: Installed on the boat and can easily be read from 5-6ft away in most lighting conditions. Note that the glare of the full sun can make any display hard to read. 4) The alarm can be silenced by pressing the mode button for less than 1 second. 5) The temperature display is only available in Degrees C. I live in the US and prefer Degrees F. I shut off this temperature display, because with my 24V system and the temperatures I mainly use the boat (20-30C) combined with the small display size, I'm concerned it could easily be confused with the Voltage reading. How water proof is it? Time will tell! It will get a full test mounted near the bow of my boat. I'll update this review if the unit fails due to water intrusion. I like the fact that it can be set up for different types of batteries. I plan to upgrade my boat in the future to LiFeP04 batteries and will only have to make a small configuration change to this unit.

### ⭐⭐⭐⭐⭐ Follow the instructions for your type of battery, and it will work well
*by B***H on December 23, 2025*

At first I had trouble setting up this battery monitor because I couldn't find the number of strings for my LiFeP04 batteries. Without this information it will give you the voltage reading but will just always show 100% charge. I finally found the correct number of strings for my batteries, and this meter works fine. It is very bright, even on a sunny day. It seems very accurate. The instructions are complete, and needs to be followed one step at a time.

### ⭐⭐⭐⭐ Nice display
*by J***D on December 10, 2025*

Nice battery monitor, but ridiculously tiny wires. Works good though

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*Product available on Desertcart Denmark*
*Store origin: DK*
*Last updated: 2026-02-01*