---
product_id: 102101524
title: "MONITOR O-128, Permanent battery lead with integrated battery status/charge system monitor for 12V lead-acid"
brand: "optimate"
price: "1500877₫"
currency: VND
in_stock: true
reviews_count: 5
category: "Optimate"
url: https://www.desertcart.vn/products/102101524-monitor-o-128-permanent-battery-lead-with-integrated-battery-status
store_origin: VN
region: Vietnam
---

# Integrated 4-LED battery status indicator 40'' cable length for versatile mounting SAE quick connect port with weatherproof cap MONITOR O-128, Permanent battery lead with integrated battery status/charge system monitor for 12V lead-acid

**Brand:** optimate
**Price:** 1500877₫
**Availability:** ✅ In Stock

## Summary

> 🔋 Stay charged, stay ahead — never miss a beat with OptiMATE O-128!

## Quick Answers

- **What is this?** MONITOR O-128, Permanent battery lead with integrated battery status/charge system monitor for 12V lead-acid by optimate
- **How much does it cost?** 1500877₫ with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.vn](https://www.desertcart.vn/products/102101524-monitor-o-128-permanent-battery-lead-with-integrated-battery-status)

## Best For

- optimate enthusiasts

## Why This Product

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

## Key Features

- • **Built-in Safety Fuse:** 15A fuse guards your battery and electronics, delivering peace of mind on every connection.
- • **Premium AGM Compatibility:** Optimized for higher voltage AGM batteries, powering your performance vehicles with confidence.
- • **Weatherproof Quick Connect:** SAE port with protective sealing cap lets you charge safely and conveniently, rain or shine.
- • **Effortless Battery Health Check:** Instant LED readout shows your battery’s charge level at a glance—no guesswork, no downtime.
- • **Tailored for Automotive Precision:** Extra-long 40-inch cable and universal 5/16'' ringlets ensure seamless fit across diverse 12V lead-acid batteries.

## Overview

The OptiMATE MONITOR O-128 is a permanent 12V lead-acid battery monitor featuring a 40-inch cable, integrated 4-LED charge status display, and a weatherproof SAE quick connect port. Designed for automotive and marine use, it supports premium AGM batteries and includes a 15A fuse for enhanced safety, making battery maintenance effortless and reliable.

## Description

Monitor charge of your stored auto/marine vehicle 12V lead-acid battery or confirm if the vehicle charging system is working correctly. 4 LEDs cover 'full to empty' voltage range of all 12V batteries, including higher voltage AGM for power sport (4th √√ LED ≥ 12. 7V ).

Review: Nice charger extension - Nice charger extension. This addition makes charging the battery much easier.
Review: Nice long charging cable! - I used this to charge my F350 diesel two battery truck while being stored over the winter. This cord allowed me to span the entire engine bay from side to side. I connected the positive cable of the drivers side battery to the passenger side inner fender grounding location.

## Features

- 𝗕𝗔𝗧𝗧𝗘𝗥𝗬 𝗠𝗢𝗡𝗜𝗧𝗢𝗥 - Easily check the status of your battery by looking at the LED lights.
- 𝗔𝗨𝗧𝗢𝗠𝗢𝗧𝗜𝗩𝗘 𝗦𝗣𝗘𝗖𝗜𝗙𝗜𝗖 - Longer 40'' length cable to easily mount in place and 5/16'' ringlets that fit a variety of battery terminals.
- 𝗦𝗔𝗘 𝗖𝗢𝗡𝗡𝗘𝗖𝗧𝗜𝗢𝗡 - SAE quick connect charge port for charging battery when needed. Weatherproof sealing cap when vehicle is moving!
- 𝗣𝗥𝗘𝗠𝗜𝗨𝗠 𝗔𝗚𝗠 - Works with premium AGM with higher voltage.
- 𝗦𝗔𝗙𝗘 - 15A fuse that protects the -40 rated cable and electronics.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B075RDDW84 |
| Best Sellers Rank | #2,160,829 in Automotive ( See Top 100 in Automotive ) #3,116 in Battery Chargers |
| Brand | OptiMate |
| Customer Reviews | 4.5 4.5 out of 5 stars (23) |
| Date First Available | May 17, 2017 |
| Exterior | Machined |
| Is Discontinued By Manufacturer | No |
| Item Weight | 3.31 ounces |
| Item model number | O-128 |
| Manufacturer | TecMate |
| Manufacturer Part Number | O-128 |
| Product Dimensions | 2.36 x 2.36 x 6.3 inches |

## Images

![MONITOR O-128, Permanent battery lead with integrated battery status/charge system monitor for 12V lead-acid - Image 1](https://m.media-amazon.com/images/I/61+cXwMD6xL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Nice charger extension
*by J***E on November 8, 2025*

Nice charger extension. This addition makes charging the battery much easier.

### ⭐⭐⭐⭐⭐ Nice long charging cable!
*by J***S on December 27, 2019*

I used this to charge my F350 diesel two battery truck while being stored over the winter. This cord allowed me to span the entire engine bay from side to side. I connected the positive cable of the drivers side battery to the passenger side inner fender grounding location.

### ⭐⭐⭐⭐⭐ x
*by A***R on January 8, 2020*

x

## Frequently Bought Together

- OptiMate O128 Battery Monitor M8 Eyelet Lead
- OptiMate O1 SAE Weatherproof Eyelet Lead, Black
- Optimate O-17 Converter Connection SAE to TM.

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**Shop now:** [https://www.desertcart.vn/products/102101524-monitor-o-128-permanent-battery-lead-with-integrated-battery-status](https://www.desertcart.vn/products/102101524-monitor-o-128-permanent-battery-lead-with-integrated-battery-status)

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*Product available on Desertcart Vietnam*
*Store origin: VN*
*Last updated: 2026-05-16*