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TecMate OptiMate 4 Dual Program Battery Charger for BMW CANbus

Item: P231162

The OptiMate 4 Dual Program Battery Charger is a ruggedly advanced charging device designed to cooperate with your BMW's delicate CANbus system. Read More

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Product Details

TecMate OptiMate 4 Dual Program Battery Charger for BMW CANbus

The TecMate Optimate 4 is CANbus-ready and features a weatherproof enclosure with built-in wall mounts, improved energy efficiency and cables good down to -40 degrees, 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 50Ah. 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.


  • CAN-bus program features KEYLESS activation program guarantees automatic re-opening of the connection even with the ignition not turned on
  • Program 2 (default setting on this model) recovers, charges, tests and maintains the battery through the CAN-bus controlled 12V socket with the included SAE-79 accessory
  • 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) 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 0.8A)
  • 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 7.87  x 2.95  x  2.40 inches (200 x 75 x 61mm)
  • Wall mounting easy direct wall mounting
  • Input cable length 6ft (2m)
  • Output cable length 6ft (2m)
  • Operation temperature range From -40°C&F to 40°C/104F
  • 3 year warranty


  • SAE-79: 12V DIN connector
  • SAE-74 clamps set for bench charging


Product Style RevZilla Item # MFR. Product # Availability
Product Style BMW CANbus RevZilla Item #869388 MFR. Product #TM245 AvailabilityAvailable: Requires 2-4 business days of lead time prior to shipment


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Product Description
The OptiMate 4 Dual Program Battery Charger is a ruggedly advanced charging device designed to cooperate with your BMW's delicate CANbus system. Read More
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Reviews & Questions

4.7 / 5.0
57 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
Bang For The Buck
4.5 / 5
4.9 / 5
4.8 / 5
Fit & Finish
5.0 / 5
All set to go right out of the box
I bought two of these for putting our BMW's to bed for the winter. Much less than the BMW brand and plugs directly into the accessory socket (CANbus). Easy ordering, fast shipping.
October 29, 2013
2014 BMW F800GS Adventure
Excellent for BMW motorcycles with CAN-bus system.
The engineer I spoke with at TecMate said some Optimate 4 chargers manufactured with a certain date stamp may or may not operate correctly with the BMW CAN-bus system, but mine with that date worked perfectly. If it had not, TecMate would pay shipping both ways. Doesn't get any better than this. Cheers, TecMate!
August 19, 2013
2013 BMW R1200RT
Bang For The Buck
5 / 5
Must have for BMW bikes with CANbus.
Very easy and intuitive to use. Plug and play. My BMW owners manual suggests putting your battery on a charger if the bike sits for two weeks or longer. Also, I love Revzilla's customer service and product follow up.
Perfect compatibility with my 2015 RnineT.
March 9, 2015
Bang For The Buck
5 / 5
Excellent Battery Tool
The Optimate 4 is all it should be and works as designed on my new 2013 BMW R1200GSW canbus system.
October 21, 2013
2013 BMW R1200GS
Bang For The Buck
5 / 5
Works great and is a much less expensive than the BMW Canbus charger
I looked around quite a bit to see if the BMW Canbus charger could be purchased inexpensively and it wasn't available. After I read the reviews here I decided to go for this charger which was $50-$80 less and I'm glad I did. the OptiMate 4 Canbus charger worked great on my 2009 BMW F800ST. I knew my battery was low because our weather has been horrible and I've barely been able to ride and get my bike charged up. 2 days after the purchase of this charger I plugged this in to my bike as the battery was dead. The charger came set to the BMW Canbus mode so other than finding a wall socket it took care of the rest. I switched modes and charged my riding lawn mower too. There are a number of lights on the charger so you really need to see the instructions the first time but once you've seen them you should be all set. I'd buy another in a heartbeat. I've only had it a short while and I certainly got my money's worth.

Keep in mind that if you have anything tied into the Canbus power when this charger starts you may turn on that device. I had a GPS device tied into the Canbus and it turned on due to the charger. I ended up directly wiring the device to the taillight to avoid the Canbus issue.
April 29, 2014
2009 BMW F800ST
Bang For The Buck
5 / 5
Awesome alternative for more expensive BMW Can-Bus compatible charger
The product works as advertised. Just take it out of the package, connect it to a power outlet and plug into your accessory socket in your BMW and it will diagnose, salvage (if neglected), charge and maintain your battery without your intervention. The instructions are very descriptive; if still confused, with a little of attention on what the device does plus reading the manual, you'll figure it out. Very happy with this charger and very glad to have saved at least 50% of the cost if compared with the recommended BMW one, with no compromise.
December 14, 2015
over 2 years ago
2006 BMW R1200GS
Bang For The Buck
5 / 5
Best charger I've ever had.
Brought my BMW battery back from the dead. I tried with another charger several times, but this one did the trick. I ride, plug it in, and let it stay on. A little pricey, but worth it since a new battery was twice as much. Switching from CANBUS to normal is super easy. Highly recommend.
October 5, 2015
2013 BMW R1200GS Adventure
Bang For The Buck
5 / 5
High Quality, Works, Instructions a Bit Confusing
Good value in a charger for a CAN bus bike. Nice to be able to charge through the auxiliary without disconnecting the battery. The instructions and indicators are a bit confusing when you first look at them. The manual needs to be rewritten. Actual use is straight forward. CAN bus models apparently will always come set for the CAN bus option. Plug it in, it will diagnose and charge, then go to alternating test/charge sequence.
November 27, 2015
2012 BMW R1200GS
Bang For The Buck
5 / 5
Excellent charger
This charger exceeded my expectations for ease of use and for effectiveness. Have used it for 2 seasons and it has been excellent. I loved it so much I bought one for my fiancé's bike. Highly recommended.
February 16, 2016
Bang For The Buck
5 / 5
Works great at a great price
I'm completely happy with this charger. It works perfectly plugged into the powerlet jack on my R1200RT and costs way less than the BMW charger.
May 26, 2015
over 2 years ago
2011 BMW R1200RT
Start typing your question and we'll check if it was already asked and answered. Learn More
Browse 18 questions Browse 18 questions and 90 answers
Why did you choose this?
RevZilla Store
Works perfectly with my 2017 BMW R nine T. I keep it plugged in all the time using the port on the left side of the engine.
Jeffrey S on Nov 2, 2017
good product no shipping charge
Edward B on Sep 14, 2017
Works perfectly with my 2017 BMW R nine T. I keep it plugged in all the time using the port on the left side of the engine.
Jeffrey S on Nov 2, 2017
Best simple canbus charger for BMW bikes. Plug it in and the battery charges.
Yong B on Sep 16, 2017
good product no shipping charge
Edward B on Sep 14, 2017
Great reviews and compatible with BMW Can-Bus
Lance B on Jul 3, 2017
Looking for an affordable CANbus charger using the Powerlet port on my bike.
JaxTech on Jun 18, 2017
Good Price!!! Works Great!
Carlos R on Jun 9, 2017
Chris B on May 26, 2017
recommended on many boards
Dougger L on May 19, 2017
Works with the BMW Canbus system.
Chris L on May 6, 2017
recommended charger
Gayla R on Apr 22, 2017
Designed specifically for use in my CANbus BMW
Edmund P on Mar 2, 2017
This charger functions with the can bus system of BMW
Kevin R on Feb 14, 2017
Works great. Have 2 of them.
Mark R on Dec 15, 2016
looking for a reasonably priced charger for my BMW to avoid the pricey BMW charger.
Rodolfo L on Dec 5, 2016
Reviews. Like the ease of operation, just plug it in the accessory slot and don't worry about it
John A on Nov 28, 2016
I use it to keep my f700gs and my wifes f650gs charged up during the long colorado winters . It plugs straight into the BMW power outlet and tells me when its all charged up .
Peter W on Nov 3, 2016
needed a charger for my BMW RT.
Paul U on Oct 26, 2016
Reasonable cost. Works with the BMW F800GT CanBus. Comes with the correct plug for the bike's accessory outlet.
Melvin R on Aug 29, 2016
BMW CANbus compatibility and high reviews.
Todd G on Jun 21, 2016
Compatibility with BMW CAN bus.
BobbyB on Jun 13, 2016
Smartest battery charger / tender out there and speaks German.
ICON 2 on Jun 12, 2016
Wanted a charger that I could plug directly into my K1600GT accessory socket. This one foot the bill and was a bit less expensive than the BMW branded charger.
Scott C on Apr 26, 2016
Again, read the Revzilla reviews. The tender works excellent with BMWs.
Edward P on Mar 30, 2016
Best value and quality to charge a BMW via the powerlet
J O on Mar 26, 2016
After a lot of research, I thought this unit would have the best chance to recover a very low battery and keep it healthy. I'm happy that it worked as advertised.
R O on Mar 23, 2016
great reviews and like the canbus system at half the price of a BMW charger. It works great.
Roger295 on Mar 22, 2016
BMW specific
William K on Mar 14, 2016
desire my battery to last
donnel m on Feb 28, 2016
BMW Canbus but unfortunately doesn't keep circuit activated and had to use it through SAE gerbing plug to battery
Peter N on Feb 25, 2016
good value, solid reviews
Anthony D on Jan 22, 2016
Specifically for a BMW
Ronald S A on Jan 22, 2016
Specific to the modern BMW Canbus system for 2013+ BMW's.
kevin S on Jan 14, 2016
charge battery on 2015 BMW R1200GS
Anthony G on Jan 7, 2016
it will work on my bmw.
H O on Jan 2, 2016
Ease of use, being able to plug straight into the bike with no additional wiring is great.
Jessy E on Dec 16, 2015
Read a review of this product in the 12/15 BMW ON magazine. Like the fact that it will work with a CANbus motorcycle. Product info states that it comes pre-programmed to activate the 12 volt accessory outlet on my 2015 R1200RT. Sounds like it should be very simple to utilize.
Donald F on Dec 2, 2015
I needed a charger for my bike and I like the simplicity of simply plugging into the accessory port. In order to do that, you need a system that works with CanBus. This one does that, and it less than half the cost of the BMW branded charger.
Erik N on Nov 23, 2015
William H on Nov 9, 2015
Works great revives weak battery's.
GPWPB on Oct 23, 2015
One of the few chargers that works with late model BMWs
Baljit C on Oct 9, 2015
Because BMW has to have a smart charger
Michael J G on Oct 4, 2015
online reviews of this product indicate that it's as good or better a product than the BMW charger that costs $100 more, and that this product will accommodate my motorcycle's CANbus electrical system.
Free shipping is a really good feature.
Kent S on Sep 23, 2015
To use for CANbus systems
Jim A on Jul 19, 2015
This is for my 2014 BMW GSA1200. Works fine. Be warned that if the battery is dead then this will not charge it at all as the Can-bus needs to turn on under battery power to be charged via this charger. I suppose that is a bike design issue and not the charger.
Bryan F on Jul 12, 2015
I chose this item because of it's ability to maintain the battery on my BMW R NineT Canbus system.
Julio P on May 16, 2015
I have owned this before and its a great tender for BMW motorcycles. Unfortunately it was stolen. So here we go again!
idbnyc on May 1, 2015
I think is the best charger for my BMW F800R in the market, at the best price
Raul Aurelio Oscar B on Mar 11, 2015
Needed it for BMW and price was right.
William G on Mar 2, 2015
Wanted a simple plug in charger for my 2012 BMW 12RT with CanBus system . From the reviews, almost all you customers are happy with this product and Revzilla makes it a stress free purchase. Thanks
Richard M on Mar 2, 2015
It maintains GEL batteries, not every charger does. It also works with the BMW CANbus system which is important to me.
John H on Feb 27, 2015
Best simple canbus charger for BMW bikes. Plug it in and the battery charges.
Yong B on Sep 16, 2017
Great reviews and compatible with BMW Can-Bus
Lance B on Jul 3, 2017
Can it take in 220V input?
A shopper on Jun 28, 2015
BEST ANSWER: Yes. Picked up a unit from the US when I travelled there and happily using it in the UK. All them units are 110/240 compatible right out of the box.
I don't see "CANbus" listed anywhere in my owners manual. Anybody know if this will work for a 2013 BMW F800GT ?
Phillip B on Oct 16, 2013
BEST ANSWER: Hi, Phillip,
This charger can be used in two different modes. Mine was already set for the CANbus mode upon arrival. It is fairly simple to switch modes, the instructions are included with the charger, and the lights on the unit will tell you if the charger is operating properly.
I am pleased with this charger. It allows me to charge the battery through the CANbus on my R1200GS at the factory socket.
Hope this helps.
Will this charger work with lithium iron batteries?
A shopper on Apr 22, 2015
BEST ANSWER: Instruction booklet says NO.
HI Revzilla, WHy do you not have
the latest model of the optimate 4 with 1 A current capability that Techmate says is approved for California as well? When will you have it?
A C on Jun 16, 2017
BEST ANSWER: Other than the Amp rate what is the difference? Why would California need to approve a charger? Isn't that more the ability of the battery to accept the change rate?
Stupid question but does this charger have to be plugged into a wall outlet to work?
A shopper on Dec 4, 2013
BEST ANSWER: I read the product description and it doesen't specify the power source.

I presently have one hooked up to my motorcycle and Yes, it needs to be pluged into a 110v receptacle.

As for it being a stupid question, I believe that the only stupid question is the one you have and don't ask.
Can I charge 60-80 Ah car battery with this charger?
A shopper on Dec 21, 2013
BEST ANSWER: The instructions state that the charger is for 3Ah to 50Ah. The maximum output current is stated to be 0.8A.

The charger has a 48 hour charge safety limit. If you are using it for a 'severely discharged automobile battery' you may need to reset the charger (as per the instructions)

So I think the answer is yes.
I have an Optimate 4 charger. Can I use it on my 2011 R1200RT accessory outlet. Is there a certain procedure I have to follow? Gary
A shopper on Sep 6, 2013
BEST ANSWER: Yes. The procedure is, you need to change the system to CAN BUS first, you do this crossing the red and black batery conector.. Lights will blink 5 times faster, 5 times slower and 2 times faster. After this you change the cables and put the BMW type for the CANBus and the system will start cheking everything.
The product comes with a manual where all of this is explain. hope helps.
I was told that the CANbus on the 2014 BMW R1200GS Adventure (water cooled) has been rewired and 'old style' charger could not be used and might fry the bus. The OptiMate 4 worked on my 2011 Adventure, can I safely use it on the 2014?
A shopper on Jun 1, 2014
BEST ANSWER: This system worked for my 2012 F800R. I suggest you call TecMate to be certain it will work for your 2014 model. This form won't accept a phone number, so go to their website and use the Contact feature.
Can I use it to charge car battery 60 - 80 Ah?
A shopper on Dec 21, 2013
BEST ANSWER: The Optimate 4 is intended for batteries up to 50 Ah, so if you have
a 60 - 80 Ah battery you may want to go with the Optimate 5.
Having said that, unless the battery is in horrible discharge, the Optimate4
would still work at maintaining the battery, charging would take a lot
longer. Its always safer to go the next step up if there are doubts.
72 Customer Reviews
72 4.5/5
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17 Questions & 40 Answers
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