---
product_id: 102101524
title: "OptiMATE MONITOR O-128, Permanent battery lead with integrated battery status/charge system monitor for 12V lead-acid"
brand: "optimate"
price: "$1.97"
currency: USD
in_stock: false
url: https://www.desertcart.us/products/102101524-optimate-monitor-o-128-permanent-battery-lead-with-integrated-battery
store_origin: US
region: United States of America
---

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

**Brand:** optimate
**Price:** $1.97
**Availability:** ❌ Out of Stock

## Summary

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

## Quick Answers

- **What is this?** OptiMATE MONITOR O-128, Permanent battery lead with integrated battery status/charge system monitor for 12V lead-acid by optimate
- **How much does it cost?** $1.97 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/102101524-optimate-monitor-o-128-permanent-battery-lead-with-integrated-battery)

## 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 ).

## 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 | #1,687,229 in Automotive ( See Top 100 in Automotive ) #2,757 in Battery Chargers |
| Brand Name | OptiMate |
| Current Rating | 15 A |
| Customer Reviews | 4.6 4.6 out of 5 stars (23) |
| Global Trade Identification Number | 05425006144285 |
| Included Components | Battery Monitor |
| Item Dimensions | 2.36 x 2.36 x 6.3 inches |
| Item Type Name | OptiMATE MONITOR O-128, Permanent battery lead with integrated battery status / charge system monitor for 12V lead-acid |
| Item Weight | 0.09 kg |
| Manufacturer | TecMate |
| Model | O-128 |
| Number of Items | 1 |
| Part Number | O-128 |
| Warranty Description | 3 Years |

## Product Details

- **Brand:** OptiMate
- **Current Rating:** 15 A
- **Item Weight:** 0.09 kg
- **Item dimensions L x W x H:** 2.36 x 2.36 x 6.3 inches
- **Number of Items:** 1

## Images

![OptiMATE 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)

## 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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*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-10-10*