OptiMate 4 Desulphating Charger Maintainer (V3)

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  • 2400mA usb charger
  • Hanging hook for optimate battery charger
  • kick stand foot

Product Overview

 optimate logotm340new.jpgom4dpchargesteps.jpg


This is the latest V3 version. 1A charge current. Note the different decals if you are shopping around!

OptiMate 4 Dual Program. Selectable CAN bus (BMW)/standard program 12 Volt battery charger. Multi Stage desuphating 12 Volt 1A Automatic battery Charger/Maintainer for motorcycles,Jet Skis, ATV's etc. Supplied with battery clips & weatherproof permanent connector.

OptiMate is a charger/maintainer that you can leave connected to any lead acid battery while a vehicle is not being used. Simply attach the pigtail lead to your battery and leave the connector some where for easy connection, on a bike for example, under your pillion seat, behind a panel, a rear foot rest. The lead has a weather proof cover to protect it from corrosion.

Simply connect OptiMate after every ride and your battery will ALWAYS be fully charged.

Download instructions

OptiMate 4 LED quick guide

Info and FAQ's 



TecMate OptiMate 4 Dual Program Battery Charger 

The OptiMate 4 DUAL PROGRAM is ideally suited to all powersport vehicles especially those used on water and in the cold. Tested, proven and endorsed by numerous power sport vehicle OE’s and users world-wide. Recommended for STD (with removable filler caps), sealed AGM (absorbed glass mat) & sealed GEL 12V lead-acid batteries up to 75Ah. Fully automatic operation that includes all safety features such as reverse polarity protection, no spark connection and is approved to UL & CSA safety standards for automatic battery chargers.


  • Default program recovers, charges, tests and maintains the battery through the CAN-bus controlled 12V socket with the optional O9, O19 or O2 accessory
  • 2nd CAN-bus program features KEYLESS activation program guarantees automatic re-opening of the connection even with the ignition not turned on. 
    Bundle listing available here with power socket adapter. 
  • 10 second test at connection indicates your battery condition, a quick and easy ‘ride meter’ that will determine if you are ready to go or will have to charge the battery first
  • OptiMate 4’s proven multi stage desulfation program saves neglected batteries (as low as 0.5V) that other chargers can't
  • Multi step program, that includes a unique cell voltage balancing step, guarantees the fastest and most complete charge
  • OptiMate 4 will maintain your battery safe and ready-to-go for months on end, with the extremely effective “charge and rest” maintenance program
  • Hourly battery condition tests monitors the battery and the current drain by the vehicle circuitry; a problem is indicated on an easy to understand light display
  • 10 second test at connection for a more hands on diagnosis of battery condition


  • Safe for 12V lead-acid batteries AGM/MF, Standard, & GEL batteries
  • 2Ah to 75Ah rated capacity
  • Fully automatic program control microprocessor with 6 stages
  • Reverse drain current less than 0.5mA
  • Output current (bulk charge 1A)
  • Automatic desulfation 2 stages (recovery and Turbo-recovery)
  • Charge time limit 48 hours (maintenance time: unlimited)
  • Maintain / test cycles 30 min/30 min (alternating hourly)
  • Charge retention test range: 12.0 - 12.6V. GOOD (green) = battery voltage > 12.6V
  • Size 200 x 75 x 61mm
  • Wall mounting easy direct wall mounting
  • Input cable length 2m
  • Output cable length 2m
  • Operation temperature range From -40°C&F to 40°C/104F
  • 3 year warranty


Includes ologosmall.png1 weather proof lead (attach permanently to your battery) and ologosmall.png4 crocodile clips.



For more accessories please see accessories page - usb chargers, torches, charge indicators, extension leads, splitters, sockets and plugs etc


BMW Owners - OptiMATE 4 Dual program features a selectable CANBUS program to charge through your accessory socket with the optional powerlet socket adapter. Also useful for Triumph, Honda etc if fitted with an accessory socket as standard. 
Bundle listing available here with power socket adapter 
OptiMate 4 Dual program defaults to normal charging mode for when charging batteries with crocodile clips, quick connect lead direct to the battery OR other bikes such as Triumph and Honda with accessory socket.

NOTE: Due to CAN bus upgrades in K1600, OptiMate 4 Dual program is unable to charge through the accessory socket on these models. Simply use the included O1 lead direct to your battery and do not use CAN bus mode.

Battery performance guaranteed!

OptiMate is an intelligent automatic charger maintainer, we don't like the term trickle charger! ;-) "trickle" chargers often maintain the battery at a fixed voltage. If too high this will boil the battery, if too low sulphation is still able to form reducing your battery's ability to perform.

If your batteries do not last much past their warranty, you should try OptiMate!




Now features triple stage desulfation, Improved charge program, improved testing.

The automatic multi stage program engages as soon as the OptiMate 4 is connected to a 12V battery that has at least 0.5V :-

  1. OptiMate 4 immediately checks if the battery has enough voltage to start the program, and whether the battery is deep-discharged ("sulfated") or not.
  2. For neglected batteries, the OptiMate 4 starts the recovery mode, initially limiting the applied voltage at 16V, and if necessary for sulfated batteries, engaging TURBO recovery at a voltage of up to 22V** at low current for up to 2 hours, to recover the battery to a condition in which it can accept a normal charge.
  3. As soon as the circuit detects that this point has been reached (immediately for most batteries), the “bulk charge” mode engages and delivers current at a constant rate of 1A to charge the battery.
  4. When the battery-sensing circuit observes that charge progress is sufficient, the unique ‘verification’ stage engages. The voltage is limited at a lower level, & if sensed necessary, a voltage pulsing action provides further desulfating & tops off the charge. When this has been verified, or if after 48 hours from connection the battery has been unable to accept & retain adequate charge, the next stage engages.
  5. The OptiMate then stops current to the battery for 30 minutes while it monitors the unsupported battery voltage to check whether the battery can retain sufficient charge to crank an engine, before the long term maintenance and test cycle begins.
  6. During the next 30 minutes the OptiMate offers the battery a supporting & maintaining charge, but only to the extent necessary to counter any losses or connected loads such as an electronic alarm or immobilizer. Overcharging and/or overheating of the battery is ruled out by this 50% duty cycle as the battery is interactively maintained for 30 minutes and then rests during the power drain tests of each alternative 30 minutes. So the battery is always 100% good to go, but never overcharged.

**The OptiMate’s high voltage desulfation mode will not engage unless the battery is first disconnected from the vehicle’s electrical system, therefore OptiMate cannot damage sensitive vehicle electronics as the higher voltage mode can only engage if minimal or zero current is flowing into the battery.
Meets all Australian standards -Ctick approved
Comprehensive selection of accessories.
3 year limited warranty.

Wall mounts are molded into the case for easy & convenient wall placement and the unit comes with battery clips that have a cable reach of over 8ft.
Suitable for Motorcycle Batteries, Jet Ski Batteries, Lawn Tractor batteries, Small boat batteries, Ski Doo batteries, ATV batteries, etc..up to 75 Ah


Warranty Information

3 Years against manufacturer defects

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(21 reviews) Write a Review

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  • 5
    Works as expected, perfect!

    Posted by Geoff on 13th Jan 2021

    The instructions could be a little clearer, but skip most of it (except the safety information) and just plug-and-play.

  • 5

    Posted by Damian O'Connell on 15th Sep 2020

    Great service from Moto-Tech, the product does what it says and is easy to use. I now don't have to worry about a flat battery when my motorcycle has been sitting using the trickle charge option.

  • 5
    Fast Delivery ,great product

    Posted by Unknown on 7th Jan 2016

    Great service,great product,speedy delivery

  • 4
    Very good product

    Posted by Paul from DUBBO NSW on 24th Jun 2014

    Thankyou Moto-Tech for your excellent service. The Opti Mate 4 is an outstanding battery charger and performs perfectly as advertised. Thankyou again for your service and product.

  • 5

    Posted by Roly Brando on 23rd Jun 2014

    Works perfectly with BMW motorcycle CANBUS system Also use it everyday connected to boat battery (out of boat) to maintain charge Century Marine Pro 400 Great product faultless / reliable

  • 5
    Economical, quality charger which saves even the most neglected batteries

    Posted by Unknown on 22nd May 2014

    Easy to use, instructions are initially a little bit confusing but once you start using and interpreting the light sequences then it all makes sense.

  • 5
    Efficient and comprehensive

    Posted by Peter on 7th Aug 2013

    Cheaper than one replacement battery! I found this product to be ideal for charging both direct to motorcycle battery and also via BMW motorcycle power outlet (Can Bus). I bought it for both applications, and it works like a charm while keeping you informed of the stage of charging / testing. No more flat batteries. Easy to follow instructions to change charging modes. Just ensure you have the Powerlet adaptor for BMW outlets and you're in business.

  • 5
    Excellent bike charger

    Posted by Pat Radnedge on 5th Jul 2013

    Seems to work as the manufacturer states, good value quality product. Have to read the instructions to initiate the device for BMW mode.

  • 4
    Great product

    Posted by Mark on 13th May 2013

    A great product, you might want to read the instructions for the CANBUS program then it is so simple to use.