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OptiMATE 4

(1 customer review)


The OptiMate 4 battery charger can save neglected batteries, but is even more effective, with a new dual-stage RECOVERY and TURBO RECOVERY desulphating action. This is the best charger for Motorcycle and cars battery maintenance.

OptiMate 4 is CANbus Ready, this is the ultimate all-in-one tool for 12V battery care at home, that diagnoses, recovers from 0.5V, charges, tests and optimally maintains, automatically. Ready to use on BMW motorcycles with CANbus.

Charging: Recommended for 12V lead-acid batteries (sealed maintenance-free, gel, or filler caps) up to 50Ah
SKU: TM340 Category:

IDEAL FOR: AGM, GEL & STD 12V batteries from 3 – 50Ah

CHARGING AMPS: 1A (constant current)

CHARGING VOLTS: nominal: 12V range: 0.5V – 14.4V

OPERATION:  Fully automatic


FEATURES: OptiMate 4 Dual Program tests before & after charging and can recover a ‘dead-flat’ battery from as low as 0.5 Volts.

USE: Indoor / Outdoor  (lowest temperature: -40°F / -40°C).

INPUT: Global (100-240V 50-60Hz), high efficiency (CEC listed).

STYLE: Weatherproof case with wall mounts, with 6ft / 180cm AC supply lead and 6ft / 180cm charge lead ending in SAE connector.

SAVE : Low Volt Start of 0.5V + 2-step* desulphation recovery (*1-step low volt pulse save during CAN-bus mode).

SAFE: No risk of overcharging. Totally safe for vehicle electronics. Sparks suppressed. Safe for long-term battery maintenance. Automatic shut-down if short-circuited or battery disconnected.

INCLUDED: weatherproof battery lead & battery clip set.

WARRANTY: 3-year limited replacement warranty.

OptiMate 4 Diagnoses, recovers, charges, checks and maintains

The microprocessor controlled OptiMate 4 uses a  new dual-stage recovery and turbo recovery desulfating action that can save can save neglected batteries. For neglected deep-discharged batteries the RECOVERY mode engages automatically, while the TURBO RECOVERY mode engages for more severely neglected batteries.  After doing the desafation the Optimate 4  then charges the battery, verifies that the battery is as fully charged as its basic state of health allows, and then checks for & detects dead battery cells.

The OptiMate 4 is much more than a trickle charger

Now with a new dual-stage RECOVERY and TURBO RECOVERY desulphating action .

For neglected deep-discharged batteries the RECOVERY mode engages automatically, while the TURBO RECOVERY mode engages for more severely neglected batteries.

  • Battery charger & tester
  • Weatherproof sealed enclosure
  • Replaceable wall mounts
Related documentation

Optimate 4 battery charger benefits

  • No risk of overcharging
  • totally safe for vehicle electronics
  • sparks suppressed,
  • ideal for long term battery maintenance
  • Auto shutdown if short-circuited or battery disconnected
  • Desulfates and saves neglected batteries
  • Optimises battery power and life
  • Tests the battery every hour
  • 100% Automatic 100% Safe

Dual program
With the flexible microprocessor controlled DUAL Program, OptiMate 4 can diagnose, recover, charge, test and maintain your battery directly, or select the 2nd program to charge via the 12V port on motorcycles fitted with CAN-bus.

Program 2 (default setting on this model) recovers, charges, tests and maintains the battery through the CAN-bus controlled 12V socket with the supplied SAE-79 accessory (see pictures to the right). The SAE-74 set of battery clips is included for direct charging.  KEY-LESS activation guarantees automatic opening & re-opening of the connection without the ignition ever being not turned on, guaranteeing absolute peace of mind during long term storage.

Advanced 12V care for all batteries

  • Standard & advanced features
  • Dual program
  • Sealed weatherproof enclosure
  • User friendly “battery check” at start
  • No risk of overcharging
  • totally safe for vehicle electronics
  • sparks suppressed,
  • ideal for long term battery maintenance
  • Auto shut-down if short-circuited or battery disconnected

Multi stage desulphation – low voltage, ‘Turbo’ and pulse will recover sealed batteries, including cyclic cell and pure lead AGM.

A unique pulsing start up method will attempt to recover batteries as low as 0,5V.
Multi stage charging – bulk, pulse absorption, cell balancing ensures each cell in the battery performs at maximum.

Enhanced testing and safety – 48 hour charge timer, detection of a battery with a shorted cell during charging, 12 hour test and test at connection.
All the unique features found in each of the OptiMate battery saving charger-tester-maintainers are the most advanced in the world today, guaranteeing any vehicle or craft owner dependent on a 12V battery the ultimate in unsupervised long term battery care.

Sealed weatherproof enclosure
OptiMate 4 has a sealed “weatherproof” enclosure with wall mounts and is ideally suited for use with batteries in the water & snow powersport markets. Also includes cables extreme weather cables

User friendly ‘battery check’ at start – Want to ride, but not sure of battery condition?
The 10 second battery “Ready to Ride?” test at connection helps the user with multiple vehicles or provides hands on diagnosis of ‘tricky’ battery problems.

Features :

  • Microprocessor control
  • 6 step charge program
  • Safe 24/7 storage charge program
  • Recovery + TURBO recovery desulfation recovers neglected batteries other chargers can’t!
  • Automatic power loss test
  • Early warning of battery problems
  • Built in wall-mount tabs
  • SAE weatherproof connector system

The most important attribute of the OptiMate 4  is the safe, optimal maintenance of your battery during long term storage, achieved by its gentle maintenance cycle which automatically allows the battery to rest for 30 minutes of each hour of the maintenance cycle while it remains connected.



OptiMate 4 Dual Program includes two charging programs; the standard program is supposed to be used when connecting directly to the battery, the CANbus (BMW) program allows charging and maintaining via the DIN socket on BMW Motorcycles (models 2004 and later)

Yes, the standard program has the most advanced recovery program which saves ‘dead flat’ sulphated batteries from as low as 0,5V.

You’ll need to select the CANbus program to charge via 12V socket on your BMW motorcycle.

 unplug the OptiMate, connect the clamps together, wait for the LED’s to confirm program change (the LED’s start to blink fast after 10 seconds) disconnect clamps. See picture on back of charger.

CANbus edition is delivered with OptiMate adapter O-09 which fits 12V sockets. Dual Program is CANbus compatible but will standard be delivered without this adapter.

You will need one of the OptiMate BIKE plug cables (O-02, O-09, O19 or O-29)

STD, AGM and GEL 12V lead-acid batteries used for engine start & deep cycle applications. (Link: Learn here about batteries, this will be at For batteries from 3Ah to 48 Ah for 24-7 battery maintenance. Can recharge batteries up to 24Ah within 24 hours.

Charge time on a flat but otherwise undamaged battery: a 12Ah battery should take no more than about 12 hours to progress to the self-discharge check. Deep-discharged batteries may take significantly longer, a full charge may not be achieved within the hour charge safety limit. In this case.

  • Dual Charge Program trusted by riders world-wide – Charge direct to battery or via 12V socket on BMW motorcycles with CAN-bus.
  • Charge, test and maintain your 12V lead-acid (STD, AGM, GEL) starter or deep cycle battery – Battery performance guaranteed!
  • Saves ‘dead flat’ sulphated batteries from as low as 0.5V – The most advanced recovery program!
  • Advanced and accurate testing before and after charging.
  • OptiMate’s 24-7 smart maintenance guarantees more battery power, longer battery life!
Charger series


1 review for OptiMATE 4

  1. Russel Alexander

    Best Bike charger I’ve owned to date. Have an Optimate 3 Dual charger as well and clear difference between the 3&4 in terms of speed and charge ability… But this is expected given the spec difference. Both exceptional at bringing dead batteries to life as long as there are no dead cells, which the unit will also indicate should it be the case. Now to test it on a large Car battery to see if applicable 🙂

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