Rendered at 06:56:36 11/15/25
Free Shipping
12V 140AMP Dual Battery Isolator Voltage Sensitive Relay Smart VSR Dual Battery
Share & earn! Sign in, share this or any listing, and youโll get commission when it sells.
Learn more
Shipping options
FREE in United States
Offer policy
OBO - Seller accepts offers on this item.
Details
Return policy
Full refund available within 30 days
Purchase protection
Payment options
PayPal accepted
PayPal Credit accepted
Venmo accepted
PayPal, MasterCard, Visa, Discover, and American Express accepted
Maestro accepted
Amazon Pay accepted
Nuvei accepted
Shipping options
FREE in United States
Offer policy
OBO - Seller accepts offers on this item.
Details
Return policy
Full refund available within 30 days
Purchase protection
Payment options
PayPal accepted
PayPal Credit accepted
Venmo accepted
PayPal, MasterCard, Visa, Discover, and American Express accepted
Maestro accepted
Amazon Pay accepted
Nuvei accepted
Item traits
| Category: | |
|---|---|
| Quantity Available: |
Only one in stock, order soon |
| Condition: |
New |
| UPC: |
Does not apply |
| MPN: |
1 |
| Input Battery Size: |
A |
| Minimum Switching Voltage: |
4.5 Volts |
| Current Rating: |
140 Amps |
| Contact Type: |
Normally Open |
| Mounting Type: |
Screw Mount |
| Operation Mode: |
Automatic |
| Brand: |
DEWINNER |
| Type: |
Adjustable Dual Battery Isolator |
| Unit Type: |
Unit |
| Coil Voltage: |
12 Volts |
| Connector Type: |
Crimp |
| Unit Quantity: |
1 |
| SKU: |
CR TF0309 p 220 |
| Upper Temperature Rating: |
80 Degrees Fahrenheit |
Listing details
| Shipping discount: |
Seller pays shipping for this item. |
|---|---|
| Posted for sale: |
November 4 |
| Item number: |
1776846180 |
Item description
DEWINNER 12V 140Amp Dual Battery Isolator Kit, Smart Voltage Sensitive Relay for Trucks, RVs, ATVs, UTVs, Boats Campers ? Works with All Battery Types Including Lithium LiFePO4
About this item
Adjustable Dual Battery Isolator: Designed for 12V dual battery systems; allows two power sources to charge from one alternator without battery drain concerns
Customizable Voltage Settings: Enables efficient power management with adjustable CUT-IN/CUT-OUT voltages for different battery types; supports a range of 4.5-20V
Adjustable Switching Delay: Prevents frequent isolator switching caused by unstable currents; prolongs battery life with delay times adjustable from 0-60s; recommended at 15s
Switchable Manual/Automatic Mode: Provides both modes and visual LED voltage readouts for real-time status indicators
Wide Compatibility: Suitable for 12V lithium batteries, LiFePO4, and lead-acid batteries; ensures versatile and reliable power management
Product description
Previous page
Next page
Smart Charging
Our Dual Battery Isolator is an intelligent device with a state-of-the-art programming design that delivers optimal performance with zero sacrifice.
Water Resistant
The IP65 rated plastic housing and silicone sealed inner layer protects the isolator from any possible water damage.
Strong Vibration Protection
The tight 4-screw mounting system and silicone-coated pads provide the ultimate in shock protection.
Dustproof
Ruggedized case provides full protection from dust, dirt, and sand. Allows you to cope with any extreme off-road weather environment or conditions.
Rating Voltage:
12V DC
Continuous Current:
120A
Intermittent Current:
160A
Cut-in Voltage:
13.3V
Cut-out Voltage:
12.8V
Delay Time:
5 Seconds
IP Rating:
IP67
Current Draw:
Charging 330mA, Standby 1mA
Added to your wish list!
- 12V 140AMP Dual Battery Isolator Voltage Sensitive Relay Smart VSR Dual Battery
- 1 in stock
- Price negotiable
- Returns/refunds accepted
Get an item reminder
We'll email you a link to your item now and follow up with a single reminder (if you'd like one). That's it! No spam, no hassle.
Already have an account?
Log in and add this item to your wish list.

