Boost battery power with this auxiliary battery solution. Isolating the starting battery, it allows aftermarket accessories to draw directly from the secondary battery when the key is off—ensuring your Defender HD11 will always start. Once the motor starts, the vehicle’s charging system will charge both batteries.
UTV Stereo Platinum Series Batteries are the longest lasting, most durable AGM (Absorbent Glass Mat) batteries on the market. Play longer, shine brighter and add aftermarket electronics with more storage capacity and higher output.
No trimming required.
Not compatible with Defender HD10.
To maintain peak performance, battery should be connected to a reliable charger/maintainer during storage. We recommend one of the following:
- Dual Bank Battery Charger/Maintainer | UTVS-BCM2 (sold separately)
- 55A Power Pack | UTVS-55-PWR-PK (sold separately)
Features:
- Provides +30Ah When Added to Starting Battery
- Direct Connection to Factory Accessory Plug
- Complete Battery Isolation
Included:
- 925 AGM Dry Cell Battery
- Battery Mount
- 80A Battery Isolator Relay
- 8 AWG Red Power Wires (2)
- 8 AWG Black Ground Wire
- Accessory Plug Harness
- Mounting Hardware
All in-stock items ship within 3 business days via UPS or FedEx Ground
We do not offer any expedited shipping options currently.
MOST ORDERS WILL REQUIRE SIGNATURE CONFIRMATION
We ship to the lower 48 States only.
We do NOT ship to P.O. Boxes or Apartment Complexes.
For International Customers, we recommend using a USA based freight forwarding company.
We take no responsibility for any shipment delays outside our control.
KEY FEATURES:
boost battery power
Gain an additional +30 amp hours when added to the 30Ah OEM starting battery.
Plug and play power
Upgrade your vehicle’s electrical system with a dual battery setup that delivers +30 amp hours of extra capacity. This isolated system allows you to run lights, stereo, and other accessories while the vehicle is off—without ever draining your starting battery.
When your vehicle is off, the 2nd battery remains completely disconnected from the starting battery, ensuring you’re always ready to start up. Once the vehicle is on, the starting battery automatically charges the 2nd battery, keeping your power reserves full and ready for your next adventure.
heavy-duty mounting bracket
Heavy-duty mounting bracket to ensure a secure, long-lasting installation, even in the toughest conditions. Perfect for withstanding vibration, impacts, and demanding environments.
isolate your second battery
The 80 amp battery isolator allows you to isolate the new secondary AGM battery while the vehicle's ignition is off, preserving your stock battery for starting. This system is quite simple: Key ON - both batteries are connected to the Defender's power system, Key OFF- the starting battery is isolated from the Defender's power system, only drawing power from the 55 amp battery. It's that simple, and it works great.
not your average agm battery
extreme reliability
Built purely for CAPACITY. The UTVS Platinum Series AGM Batteries are engineered for sustained power and long-lasting energy, not just starting performance. Higher amp-hour capacity delivers stronger voltage and extended runtime under load.
Rest assured that these batteries can handle some abuse and will offer years of performance.
long-lasting & most durable
Developed to tackle the toughest off-road conditions, these batteries are completely sealed, vibration resistant and maintenance-free. Using highly absorbent glass mats to hold the electrolyte in place, resulting in superior efficiency and durability.
keep your battery running strong
Keeping AGM batteries charged is essential to prevent sulfation, preserve capacity, and extend lifespan. That’s why we recommend using a UTV Stereo Charger/Maintainer for reliable performance and long-term battery health.