Duraboost Battery Maintainer 750

The DuraBoost Charger/Maintainer 750 is perfect for those wanting to charge and maintain their 12v lead acid battery. It constantly monitors your battery voltage and if it falls below 12.8V, the charger will charge the battery at a constant 750mA until the battery is fully charged (13.6V) and then turn itself off.


  • Checks for proper battery connection polarity and for internal battery damage
  • Automatically switches from charge mode to maintenance mode
  • Red LED light shows when charging and changes to green when fully charged
  • 0.75 amp charge rate
  • Overcharge and Short Circuit Protection
  • Includes SAE quick disconnect battery lead and SAE Alligator clip lead
  • Safe for use on all 12v Lead Acid type batteries including, Conventional Flooded (wet), Factory Activated Maintenance Free (MF/FA), Absorbed Glass Mat Maintenance Free (AGM), and Gel (Gel Electrolyte) type batteries
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Browse 5 questions Browse 5 questions and 11 answers
What does flashing red light in the middle mean?
A shopper on Jul 30, 2016
What does it mean if it flashes from green to red? Does it mean it is maintaining the battery?
A C on Dec 29, 2016
BEST ANSWER: If you read the owners manual that came with the product, it shows the battery will flash from red to green when it is in maintaining mode. The time between the battery going from green to red, shows how strong how battery is and how long it can hold the voltage before needing the charger again
What does it mean when there's a red light in the middle?
A shopper on Jul 10, 2017
BEST ANSWER: The red indicator light verifies your charger is connected, since there is no needle gauge. Very visible in low light.
Can you use extension cord with maintainer?
A shopper on Jun 21, 2017
BEST ANSWER: Absolutely. This doesn't pull much amperage. I put a few on a power strip in fact.
What does it mean when the light flashes red and green on the Douro boost 750?
A shopper on Jun 16, 2017
BEST ANSWER: red means it is charging and green means it is maintaning
Product Style Item # Manufacturer Product # Availability
Duraboost Battery Maintainer 750 1128118 TE4-0237 In Stock: Ships next business day