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BLI Priority Start! 12-Volt PROMAX Automatic Battery Power Protector

Stops dead batteries! The Priority Start 12-Volt PROMAX Automatic Battery Power Protector saves you money by maximizing the life of your vehicle's battery and alternator. With 3 easy connections, PROMAX installs in less than 15 minutes, no hard wiring required.

  • Easy to use: no buttons to push, no timer to set, no hood to lift
  • Totally automatic, computerized voltage disconnect system protects your starting power, battery and alternator
  • Constantly monitors battery voltage when key is off
  • Detects and automatically disconnects then automatically reconnects by operating headlight switch
  • Patented technology disables the system when engine is running if battery voltage drops below disconnected threshold
  • Mil-Standard (military strength) components
  • Voltage "spike" protection
  • Patented microprocessor
  • Battery power indicator
  • Vibration/shock-protected
  • Fix-Before-Failure
  • Gear Drive System (30% stronger than original design)
  • Universal design fits and works with any 12-volt top or side post batteries
  • 4 issued U.S. patents
  • Operates only when needed
  • Dead batteries and alternators can cost thousands of dollars! PROMAX helps you prevent...
  • Lost Man Hours
  • Down time
  • Lack of vehicle availability
  • Expensive road calls
  • Battery and alternator damage
  • U.L. tested
  • Certified to S.A.E. J1171, I.S.O. 8846 standards, C.E., and E-marking

FREE standard shipping for online orders with with an order total of $99 or higher.
$6.95 standard shipping for online orders with an order total of $98.99 or below. Qualifying amount applies to merchandise only. Subject to change without notice. Offer valid for standard shipping within the contiguous United States (some restrictions apply such as shipping to Canada, Alaska, Hawaii, and all other destinations outside the continental United States including APO and FPO addresses are not eligible for this promotion and may incur additional charges). Additional fees apply to haz-mat/chemicals/ aerosols, over sized or unusually heavy items/orders,including but not limited to ladders, fire hose, pepper spray, fire extinguishers, full-size light bars and spike strips. Some vendors are also excluded, view a list of excluded brands here.


Shipping rates apply to all products. Some orders may require additional shipping charges.

Standard Shipping Charges

Charges for addresses in the contiguous United States only.
Order Total Standard 2-Day Air** Next Day Delivery
Up to $25 $8.49 $6.95 $28.48 $33.48
$25.01 to $50.00 $10.49 $6.95 $30.48 $35.48
$50.01 to $98.99 $12.49 $6.95 $32.48 $37.48
$99.00 to $150.00 $14.49 $0 $34.48 $39.48
$150.01 to $200 $16.49 $0 $36.48 $41.48
$200.01 to $250.00 $18.49 $0 $38.48 $43.48
$250.01 to $300.00 $20.49 $0 $40.48 $45.48
$300.01 to $350.00 $23.49 $0 $43.48 $48.48
$350.01 to $400.00 $25.49 $0 $45.48 $50.48
$400.01 to $500.00 $27.49 $0 $47.48 $52.48
$500.01 to $750.00 $31.49 $0 $51.48 $56.48
$750.01 to $1,000 $34.49 $0 $54.48 $59.48
$1,000.01 and over $38.49 $0 Contact us for a quote

BLI Priority Start! 12-Volt PROMAX Automatic Battery Power Protector

Item #: PSI12VPROMAX

Was $117.95

Now $108.99
12 in stock

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