---
product_id: 321019428
title: "Optimate 2 Duo, TM-551, Bronze Series: 5-Step 12V / 12.8V 2A Sealed Battery Charger & maintainer, Blue"
brand: "tecmate"
price: "577.61 DT"
currency: TND
in_stock: true
reviews_count: 8
category: "Tecmate"
url: https://www.desertcart.tn/products/321019428-optimate-2-duo-tm-551-bronze-series-5-step-12v
store_origin: TN
region: Tunisia
---

# 2A smart charging power Dual lithium & lead-acid support Fully sealed, weatherproof case Optimate 2 Duo, TM-551, Bronze Series: 5-Step 12V / 12.8V 2A Sealed Battery Charger & maintainer, Blue

**Brand:** tecmate
**Price:** 577.61 DT
**Availability:** ✅ In Stock

## Summary

> 🔌 Charge smarter, live powered—never miss a beat!

## Quick Answers

- **What is this?** Optimate 2 Duo, TM-551, Bronze Series: 5-Step 12V / 12.8V 2A Sealed Battery Charger & maintainer, Blue by tecmate
- **How much does it cost?** 577.61 DT with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.tn](https://www.desertcart.tn/products/321019428-optimate-2-duo-tm-551-bronze-series-5-step-12v)

## Best For

- tecmate enthusiasts

## Why This Product

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

## Key Features

- • **Plug & Play Peace of Mind:** Fully automatic 5-step charging means connect and forget—no battery guesswork.
- • **Battery Lifespan Maximizer:** 24/7 maintenance mode prevents discharge, extending your battery’s life and power.
- • **Trusted by Industry Giants:** Endorsed by Honda, Yamaha, Kawasaki, KTM, and top battery brands for unmatched reliability.
- • **Rugged & Ready for Anything:** Durable, sealed design protects against spills and rain—perfect for any environment.
- • **Universal Battery Whisperer:** Seamlessly charges both 12V lead-acid and 12.8V lithium batteries with zero hassle.

## Overview

The Tecmate Optimate 2 Duo TM-551 is a premium 5-step, fully automatic 2A charger and maintainer designed for 12V lead-acid and 12.8V lithium batteries. Its weatherproof sealed casing and industry endorsements make it a trusted, durable solution that extends battery life by preventing discharge and intelligently managing charging cycles. Ideal for professionals managing multiple vehicle batteries, it offers hassle-free, continuous maintenance with long cords and versatile connectors.

## Description

desertcart.com: Tecmate Optimate 2 Duo, TM-551, Bronze Series: 5-Step 12V / 12.8V 2A Sealed Battery Charger & maintainer, Blue : Everything Else

Review: Best one I own - I keep all of my power equipment and toys on battery tenders and usually buy the cheaper ones which work great. I wanted a better one to use on my CanAm Ryker and to occasionally analyze and fix batteries in my John Deere mower, truck, etc. so I bought this model. It works great and fully automatic. Just plug it into a battery and walk away. It has lond enough cords that I don't have to use an extension and is fairly priced.
Review: Cheaper Than Changing Car Insurance - Great little device. Bought this maintainer for my M I L's car. Doesn't drive it much and since switching to A/S milewise car insurance, dead batteries are the new reality. Contrary to what the insurance co says, the obd2 device does draw more current. Not much but enough to create a no start situation in 4 or 5 weeks versus 3 months. I've checked her car with a very accurate ammeter, 17ma key off drain wo the device and 45ma with the device plugged in. Not quite 3x the current drain. The cost of this device was a lot less than switching her car insurance. The vast majority of people with those devices would never be aware of the increased current draw since they drive them frequently enough that a no start simply wouldn't happen. All the ins co tells you is take it to a mechanic. WTH, I am a mechanic. Very satisfied with the purchase and so is my M I L. Disconnecting the 2 alligator clips was not a big deal for her at all and then closing the hood. I would reconnect the charger the next time I was at her house. Highly recommended for anyone with a similar situation.

## Features

- 𝗙𝗨𝗟𝗟𝗬 𝗔𝗨𝗧𝗢𝗠𝗔𝗧𝗜𝗖 - Connect and forget, no more battery problems. Continuous charging if healthy, stops and warns if faulty
- 𝗗𝗨𝗢 - Works with both lithium and lead-acid batteries.
- 𝗚𝗘𝗧 𝗬𝗢𝗨𝗥 𝗕𝗔𝗧𝗧𝗘𝗥𝗬 𝗧𝗢 𝗪𝗢𝗥𝗞 - Saves your 12V lead-acid or 12.8V lithium battery when no other charger will work. If OptiMATE can't save it, nothing will.
- 𝗟𝗢𝗡𝗚𝗘𝗥 𝗕𝗔𝗧𝗧𝗘𝗥𝗬 𝗟𝗜𝗙𝗘 - Provides 24/7 protection by preventing discharge from connected circuitry and guarantees more battery power.
- 𝗛𝗜𝗚𝗛𝗟𝗬 𝗥𝗘𝗣𝗨𝗧𝗔𝗕𝗟𝗘 𝗖𝗛𝗔𝗥𝗚𝗘𝗥 - OptiMATE is recommended by Honda, Yamaha, Kawasaki, KTM and Husqvarna and global battery manufacturers Antigravity, Super-B and Earth-X.
- 𝗛𝗜𝗚𝗛𝗟𝗬 𝗗𝗨𝗥𝗔𝗕𝗟𝗘 - Fully sealed case to protect against spillage and light rain.
- 𝗔𝗟𝗟 𝗜𝗡 𝗢𝗡𝗘 - General purpose charger for all batteries and vehicles!

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B08ZDM866W |
| Amperage | 2 Amps |
| Best Sellers Rank | #48,870 in Automotive ( See Top 100 in Automotive ) #263 in Battery Chargers |
| Brand | Tecmate |
| Customer Reviews | 4.8 4.8 out of 5 stars (88) |
| Date First Available | March 18, 2021 |
| Item Weight | 1.63 pounds |
| Item model number | TM-551 |
| Manufacturer | TecMATE |
| Manufacturer Part Number | TM-551 |
| Model | OptiMATE 2 DUO |
| Product Dimensions | 6.61 x 1.61 x 1.73 inches |

## Product Details

- **Brand:** Tecmate
- **Color:** Blue
- **Input Voltage:** 5 Volts
- **Item Weight:** 0.74 Kilograms
- **Output Voltage:** 12.8 Volts

## Images

![Optimate 2 Duo, TM-551, Bronze Series: 5-Step 12V / 12.8V 2A Sealed Battery Charger & maintainer, Blue - Image 1](https://m.media-amazon.com/images/I/71BxYXU6D7L.jpg)

## Available Options

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

## Questions & Answers

**Q: Does this work with any lithium battery?**
A: Yes, the DUO is advertised to handle all batteries. It must be the charger that has the "DUO" name in it to work with lithium.

**Q: can this charge a lead acid battery and a lithium battery at the same time?**
A: Hello,

This unit has two smart independent charging channels, so yes you can charge lithium and Lead-acid at the same time.

**Q: is the plug type C included for Europe?**
A: No it is not. You might try contacting Tecmate that makes the charger to see if it's available. Only SAE connector and alligator clips are included.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Best one I own
*by T***E on August 19, 2025*

I keep all of my power equipment and toys on battery tenders and usually buy the cheaper ones which work great. I wanted a better one to use on my CanAm Ryker and to occasionally analyze and fix batteries in my John Deere mower, truck, etc. so I bought this model. It works great and fully automatic. Just plug it into a battery and walk away. It has lond enough cords that I don't have to use an extension and is fairly priced.

### ⭐⭐⭐⭐⭐ Cheaper Than Changing Car Insurance
*by R***N on August 28, 2025*

Great little device. Bought this maintainer for my M I L's car. Doesn't drive it much and since switching to A/S milewise car insurance, dead batteries are the new reality. Contrary to what the insurance co says, the obd2 device does draw more current. Not much but enough to create a no start situation in 4 or 5 weeks versus 3 months. I've checked her car with a very accurate ammeter, 17ma key off drain wo the device and 45ma with the device plugged in. Not quite 3x the current drain. The cost of this device was a lot less than switching her car insurance. The vast majority of people with those devices would never be aware of the increased current draw since they drive them frequently enough that a no start simply wouldn't happen. All the ins co tells you is take it to a mechanic. WTH, I am a mechanic. Very satisfied with the purchase and so is my M I L. Disconnecting the 2 alligator clips was not a big deal for her at all and then closing the hood. I would reconnect the charger the next time I was at her house. Highly recommended for anyone with a similar situation.

### ⭐⭐⭐⭐⭐ Works well
*by C***C on November 16, 2025*

I use this all the time. It works very well. Does what it’s supposed to.

## Frequently Bought Together

- Tecmate Optimate 2 Duo, TM-551, Bronze Series: 5-Step 12V / 12.8V 2A Sealed Battery Charger & maintainer, Blue
- Optimate cable O-01, ring terminal harness, powersport
- OptiMate 1 DUO, 0.6A Automatic Battery Charger & Maintainer for all 12/12.8V Motorcycle and Powersport Batteries

---

## 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.tn/products/321019428-optimate-2-duo-tm-551-bronze-series-5-step-12v](https://www.desertcart.tn/products/321019428-optimate-2-duo-tm-551-bronze-series-5-step-12v)

---

*Product available on Desertcart Tunisia*
*Store origin: TN*
*Last updated: 2026-02-08*