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OptiMate 6 Charger Maintainer TM-378

OptiMate 6 Charger Maintainer TM-378

7 total reviews

Regular price $189.95 AUD
Regular price Special Offer Price! $189.95 AUD
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OptiMate 6 Ampmatic - New 2023 model!

The smartest fully sealed battery charger & maintainer for the 12V AGM, GEL or STD batteries in your car / pick-up truck, 4x4, marine craft, pwc, RV and garden machinery.

Most popular and easy to use charger!

  • Automatically charge, test and maintain any size 12V AGM, GEL, EFB or STD starter or deep cycle battery. 
  • Connect to battery and the charger does the rest. 
  • Ampmatic charge control adjusts current to match battery size – Small battery gets less, large battery gets more!
  • Saves ‘dead flat’ sulphated batteries from as low as 0.5V 
  • Unique pulsing absorption mode optimizes battery performance – All cells are brought to equal strength!
  • OptiMate’s 24-7 smart maintenance guarantees more battery power, longer battery life!


  • IDEAL FOR: AGM, GEL, Deep Cycle, Odyssey & STD 12V batteries from 3 – 144Ah. It can charge larger batteries, it will just take a little longer.
  • CHARGING AMPS: 6A (Ampmatic current) Automatically adjusts to your battery  condition.
  • CHARGING VOLTS: nominal: 12V range: 0.5V – 14.4V
  • OPERATION:  Fully automatic
  • Steps: 9
  • Temperature compensation: Voltage is adjusted higher when colder, or lower when hotter.
  • Ampmatic: Automatically adjusts current to match battery size and condition.
  • Weatherproof: IP54 Rating 

FEATURES: Saves batteries other chargers can’t, because it recognizes the difference between a discharged battery that needs charging and a dead flat sulphated battery that needs saving

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.

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.

Download Manual

All Optimate chargers are fitted with AU mains plug from factory and meet all AU electrical product standards and marking requirements. 


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Customer Reviews

Based on 7 reviews
It's not a magic wand, but it does actually save most batteries

I've tried the Optimate 6 with Deep Cycle, SLAs and regular lead acid batteries and had success with all types so far.
Marginal batteries were fixed with one pass of the Optimate 6, while batteries I thought were probably gone but worth a try took several attempts before they were recovered.
Optimate 6 has already saved me over $1500...

I recommend anyone who has a store of marginal expensive batteries to buy the Optimate 6. Even if you only save some of your batteries, you'll still be way ahead.

Wow wow and wow

I've had an optimate 2 for ages trickle charging the track bike doing a superb job. Decided to finally add the optimate 6 to the shed as switching the optimate 2 between 3 bikes was a nuisance.

Left the street triple r on it over the week, never had it start so quick. Best bike charger ever

AV Technician
"Its Works" and extremely well...

I have a collection of SLA batteries here in the workshop and have found this charger will actually test the condition of the battery as well as charge it correctly.
Even though the terminal voltage may be okay, the condition of the battery is tested so I can throw out the ones that don't come up to spec.
If you need to maintain lead acid batteries, this would be the charger of choice.

Terry Prendergast
Indispensable electrial First Aid Kit, if you don't have one, get one!

I've got 2 Optimate 4 chargers in my garage now, keeping my motorcycle batteries alive when I can't be riding them. When I saw that Moto-Tech were now selling Optimate 6's for cars, I had to have one!

My parents own a POS old Triumph car with typical British electrics, and were on a first name basis with the auto club guy. I bought them a jump-start pack, but they're not mechanically minded so that was a waste of money, so I decided that the Optimate 6 would be the "fix".

I was right, their car now starts first time even on cold mornings, and they haven't had to call the auto club since.

The electrical connectors have been changed to bigger, more robust connectors on the Optimate 6, and so the optional cigarette lighter adapter from my Optimate 4 purchase won't fit my Optimate 6 for use on my parents car. I'll pony up the $25.00 or one, as my mum has problems plugging in, and unplugging the heavy duty Optimate 6's connectors.

Steve (Owner of Moto-Tech)
Brought back an Odyssey battery from 2.4V!

Picked up an Odyssey PC1700 battery from the local tip (shhh) Was only a year old according to the date stamp on it. Checked voltage when i got back, 2.4V! So i hooked up the OptiMate 6. After a few hours i was shown the red light telling me the battery was not taking charge. HOWEVER, as per the instructions, after an hour i reconnected the OptiMate 6 and tried again. In fact it was on the 6th attempt that the battery was then able to be re charged and reached the green light. Passing the 12 hour test with ease. This battery now jump starts classic V8's at local car shows most weekends. $500 worth of battery, saved by a $140 charger! do the math!