What is the difference between the 12.8V Duo versus the regular one?

The 12.8 V Dou is suitable for lithium-ion batteries as well as lead acid batteries.

What is the difference between all the chargers optimate offers? i want to charge an agm battery, prius 2001 car. thanks.

The one I have is a maintenance charger it charges and maintains battery health and longlife

The company which is Tecmate was founded in Belgium in 1994. They manufacture chargers for many brand names, however I'm not sure where they are actually made!

Will this charge a dead 12v auto battery? Or is it used just to maintain a battery?

*Perfect for charge and maintenance of all 12V lead-acid (STD, AGM, GEL) and 12V LiFePO4 'Lithium'.

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Tecmate TecMate Optimate 1 Duo, TM-409, 4-Step 12V / 12.8V 0.6A Battery Charger & maintainer

Tecmate TecMate Optimate 1 Duo, TM-409, 4-Step 12V / 12.8V 0.6A Battery Charger & maintainer

Product ID: 596410564

Details

Brand
Tecmate
Item Weight
553 g
Output Voltage
12 Volts
Product Dimensions
9.5D x 6W x
Specification Met
CEC

⚡0.6A precise charging current

🔄Compatible with lithium & lead-acid

🔋4-step smart battery maintenance

SAR 660

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Description

🔋 Keep your ride ready, always charged, never left behind.

TRUSTED BY LEGENDS - Endorsed by Honda, Yamaha, KTM & more—join the elite circle of riders who rely on OptiMate.
BATTERY SAVIOR MODE - Resurrects deeply discharged 12V batteries when others give up—your last line of defense.
24 7 POWER PROTECTION - Continuous maintenance prevents discharge and extends battery lifespan for year-round readiness.
CONNECT FORGET AUTOMATION - Fully automatic 4-step charging means zero hassle and maximum battery health.
DUAL CHEMISTRY COMPATIBILITY - Seamlessly charges both lithium (LiFePO4) and lead-acid batteries—one charger for all your rides.

The Tecmate Optimate 1 Duo TM-409 is a compact, fully automatic 4-step battery charger and maintainer delivering 0.6A output. It supports both 12V lead-acid and 12.8V lithium (LiFePO4) batteries, featuring smart microprocessor control to optimize battery health, rescue deeply discharged batteries, and provide continuous maintenance. Trusted by top motorcycle brands and built with a durable dustproof case, it ensures your battery stays in peak condition year-round.

Specifications

ASIN	B076JSXGBQ
Amperage	0.6 Amps
Best Sellers Rank	#335,027 in Car & Motorbike ( See Top 100 in Car & Motorbike ) #1,422 in Battery Tools
Box Contents	Battery Charger
Brand	Tecmate
Brand Name	Tecmate
Connector Type Used on Cable	Battery Clips and Harness Lead with Fuse
Country of Origin	USA
Current Rating	0.6 Amps
Customer Reviews	4.8 out of 5 stars 335 Reviews
Global Trade Identification Number	05425006145657
Input Voltage	240 Volts
Item Dimensions D x W x H	9.5D x 6W x 3.8H Centimeters
Item Type Name	OptiMATE 1 DUO, TM-409, 4-step 12V / 12.8V 0.6A battery charger & maintainer
Item Weight	553 g
Item Weight Unit of Measure	553 g
Manufacturer	TecMate
Manufacturer Part Number	TM-409
Model Number	TM-409
Number of Ports	1
Output Voltage	12 Volts
Product Dimensions	9.5D x 6W x 3.8H Centimeters
Specification Met	CEC
UPC	644978440354
Unit Count	1.0 Count

Reviews

S**P

A most have

Perfect addition to keep my Harley battery charged. Kicks butt and its a most have! Easy to install and easy to use.

11.02.2026

L**O

Ottimo apparecchio

Caricare batteria scooter

11.09.2019

E**T

Great unit!

Works great! I would recommend the purchase.

7.02.2026

A**R

Save time

Don't need to take out battery. Very convenience.

16.09.2022

C**2

Optimate battery charger

Everything went smoothly and the product works like it should! Thanks, highly recommended!

14.12.2025

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SAR 660

Duties & taxes included

In stock

Sold byAmazon KSADelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

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