PriorityStart! 12 Volt ProMax Battery Protector
Special deals available for this item; call us at 1-800-405-2121 today and save!
Item #: 12V-PROMAX   |    In Stock

PriorityStart! 12 Volt ProMax Battery Protector
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PriorityStart! 12 Volt ProMax Battery Protector

Special deals available for this item; call us at 1-800-405-2121 today and save!
Item #: 12V-PROMAX   |  In Stock

Price: $112.95
Free Shipping! Free Shipping

Price: $112.95

Best Value
Free Shipping
1 Year Factory Direct Warranty
Brand New
100% Compatibility
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Product Specifications for PriorityStart! 12 Volt ProMax Battery Protector

BM Part #: 12V-PROMAX
Voltage: 12 Volt
Length: 5"
Width: 3"
Height: 1.25"
Shipping Weight: 3.00Lbs
Warranty: 1 Year Factory Direct
Product Manual: Download
  • This item is covered by the Replacement Only Return Policy.
  • No more dead batteries!
  • Automatically Disconnects; any drain on the battery (when engine is off), even a short, leaving starting power, NO dead battery!
  • Automatically Reconnects; simply put foot on brake, or operate light switch, any small load change and start the vehicle. No button to push, or raising the hood.
  • Do-it-yourself installation 3 easy steps - No hard wiring. Easy to attach; Connect your vehicle positive cable to PriorityStart! Attach PriorityStart! Cable to your positive post. Attach the ground wire to the batteries negative post-that's it!
  • 20 years proven technology protecting vehicle battery alternators, electrical system, your family and your wallet, used by thousands of law enforcements, utilities, and fleets, many using 2way/CB radios, radar, GPS, Dual batteries, chargers, TV, monitors etc.

Product Description

Free Standard Shipping!

Order today and receive free standard shipping on your PriorityStart! 12 Volt ProMax Battery Protector. Only valid in the contiguous 48 states and not valid with any other offer.

Current models include LED light.

Easy to Attach!

  1. Connect your existing vehicle positive cable to Priority Start
  2. Attach the PriorityStart! 12v battery protector cable to your battery's positive post
  3. Attach the ground wire to the battery's negative post

This PriorityStart! battery protector is specially designed for Law Enforcement, Fleets, Utility, Emergency, and Security vehicles with multiple accessories. PriorityStart! 12v battery protector is an automatic computerized on/off “switching” system protecting battery voltage and starting power. If battery voltage drains below 11.7 volts when engine is off, it automatically disconnects the load. The battery voltage immediately recovers. TO START: just step on brake pedal, starting power is automatically reconnected. Designed to handle 1000 “starting amps”.

Often multiple accessories mimic “engine run”. The Pro-Series is specially designed to handle multiple accessory loads, utilizing higher value electrical components to monitor “engine run” when the engine is off.

Pro-Series is successfully being used in vehicles with:

  • 2 way/CB radios
  • Radar Systems
  • GPS
  • Cell phones
  • Computers
  • Flashlight Chargers
  • Mobile Equipment
  • Dual batteries
  • Hi-Amp Stereo Systems
  • Mobile T.V

PriorityStart! battery protector is an electronic cut off switch. It will not charge or maintain a battery.

Have a question regarding use of this item? Contact PriorityStart directly for installation or technical support. They can be reached at (800) 780-8276

View Parallel Dual Battery Installation Instructions

Cross Reference

The PriorityStart! 12 Volt ProMax Battery Protector has been cross-referenced to be compatible with or replace these OEM part numbers and models:

Customer Reviews

84 Reviews | 4.7 out of 5
5 stars (67)
4 stars (13)
3 stars (1)
2 stars (1)
1 star (2)
Would recommend this product.
What our Customers are saying
Love PriorityStart!!
June 28, 2020
by on June 28, 2020

Like the 1st one so much I just bought a 2nd for my 2001 toyota 4runner!!! The 1st one totally resolved my parasitic drain issue on my subaru which was a 6 amo drain!! Thanks guys!!

Would recommend to a friend?
Great Great Great
June 25, 2020
by on June 25, 2020

Fixed my car and is easy to install

Would recommend to a friend?
Great Puduct
February 2, 2020
by on February 2, 2020

I love this But! this is a problem this the led connector, it need to be replaced with a nut and Bolt Connector,
on my truck the live cable came off the led connector and almost shorted on the body of the truck, vary dangers,
I went to canadain tire and bought a led post connector with nut and bolt,and it took care of the problem. In all Great Puduct.

Scarborough, On.
Would recommend to a friend?
100% satisfied
January 16, 2018
by on January 16, 2018

I am fully satisfied of this device. It saves my old car.

Would recommend to a friend?
doesn't work on my car without special steps
October 9, 2017
by on October 9, 2017

The device was correctly installed by my mechanic. Apparently, per the Priority Start person, there are some cars where the usual instructions to trigger a small voltage change and activate the switch does not work. There is a work-around: unplug the ground wire manually and then the battery reconnects. Or there is a remote switch that can be installed inside the vehicle. I have a 2005 Infiniti FX.

san francisco
Would recommend to a friend?
great product
September 20, 2017
by on September 20, 2017

works like it say it will.

Would recommend to a friend?
Great product
January 5, 2017
by on January 5, 2017

After many attempts at trying to find the drain winter set in. I needed a dependable vehicle. I found this and installed in minutes. Works every time the care sits a long time. Now looking at getting one on each car so nobody in the family gets that awful click and no start. Thank you.

MN Dave
Would recommend to a friend?