SKU: 48025551978

CROWN INDUSTRY 500a split charge relay for isolating 2nd battery

Sale price$72.00 Regular price$80.00
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  • USA
  • CAN

Ships within 48 hours · Estimated delivery Jul 28 - Aug 2

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Description

CROWN INDUSTRY 500a split charge relay for isolating 2nd batteryThis relay Perfect for isolating one of our lithium batterys when in conjunction with the factory oem battery preventing our lithium from draining down to the float voltage of the oem factory battery. Giving a longer life span to the lithium and putting less stress on the alternator and engine when starting the vehicle. Our RLY 500 is Ideal for 2nd battery isolation, our high current relay is the most reliable and efficient way to add secondary

This relay Perfect for isolating one of our lithium battery’s when in conjunction with the factory oem battery preventing our lithium from draining down to the float voltage of the oem factory battery. Giving a longer life span to the lithium and putting less stress on the alternator and engine when starting the vehicle. 

Our RLY-500 is Ideal for 2nd battery isolation, our high current relay is the most reliable and efficient way to add secondary batteries to your system. Compatible with all types of alternators and charging systems, simply connect these relays to operate when the ignition is turned on. The battery systems remain separate while the ignition is off, preventing system drain. Water resistant black phenolic plastic, 100,000 mechanical cycle life. With a  500 amp contact rating.

  • Prevents primary battery discharge
  • Maximum current transfer 
  • Ideal for 2nd audio battery isolation from vehicle systems
  • High current relays are the most reliable and efficient way to add secondary batteries to your system
  • Compatible with all types of alternators and charging systems
  • Water resistant black phenolic plastic
  • 100,000 mechanical cycle life
  • 500A constant 900A peak current
  • Compatible with all types of LITHIUM, AGM, LEAD ACID batteries 
  • m8 input and output studs 
  • m5 studs for the energisation coil 
  • 95mm tall x 67mm wide 
  • 12 month warranty 
Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 48025551978

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4.7 ★★★★★
Based on 5 reviews
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Verified Purchase
RUNR09
Whiting, US
★★★★★ 1
Not worth it
Color: Silver/Battery
I had this for four months and now it just shreds the cans. I tried replacing the batteries and that did not help. It makes tiny peices of metal that you get stuck in your fingers. Wouldn’t recommend
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 18, 2026
A
Verified Purchase
Amazon Customer
New York, US
★★★★★ 4
Very handy
Color: Silver/Battery
Easy to use once you figure it out. The lids are a little hard to get off the can once it is done, but I like the gadget.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on December 12, 2025
J
Verified Purchase
Juanita Bires
Massapequa, US
★★★★★ 5
Good Item
Color: Silver/Battery
Works very well once you figure it out.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on September 19, 2025
E
Verified Purchase
Edgar Banks
Lexington, US
★★★★★ 5
Post
Color: Silver/Battery
Try it you'll like
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 4, 2026
J
Verified Purchase
Joe Blair
Grantham, US
★★★★★ 2
Failed at 3 months.
Color: Silver/Battery
I ordered this on Oct 6th. When I first got it, it worked great. I didn't need to use it all that often but here it is, 3 months later, and it is broken. It fails to cut open any cans. Tried on multiple cans over multiple times but it just spins cutting nothing. Total waste of money. Avoid this product if you care about durability or longevity of your purchases.
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Reviewed in the United States on January 23, 2026

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