Yes, many Jeep Compass models—especially those equipped with the Start/Stop system—are designed with two batteries. These are typically referred to as the main battery and the auxiliary battery.
How the Two Batteries Work in a Jeep Compass
- Main Battery (Primary Battery):
- Powers the starter motor, engine, and most of the vehicle’s electrical systems.
- Located in the engine bay.
- Auxiliary Battery (Secondary Battery):
- Supports the Start/Stop system, powering accessories when the engine shuts off at a stoplight or in traffic.
- Helps ensure a smooth restart of the engine when you release the brake pedal.
- Often located in the engine compartment or under the passenger seat, depending on the model year.
Which Jeep Compass Models Have 2 Batteries?
- The 2017 and newer Jeep Compass models with ESS (Engine Stop/Start) technology commonly have a dual battery system.
- Older Compass models without ESS typically have just one battery.
Why Does the Jeep Compass Have 2 Batteries?
The secondary (auxiliary) battery helps:
- Run electrical systems (radio, lights, AC) when the engine automatically shuts off in Start/Stop mode.
- Reduce strain on the main battery, extending its life.
- Provide backup power to help restart the engine seamlessly when you accelerate.
Symptoms of a Failing Auxiliary Battery
- ESS (Start/Stop) not working properly
- Warning messages on the dashboard (like “Stop/Start Unavailable”)
- Slow engine restarts after stopping
- Electrical glitches (dimming lights, infotainment screen flickering)
Do Both Batteries Need Replacing at the Same Time?
Not always, but it’s common to replace both batteries together, especially if:
- They are both aging or failing.
- The auxiliary battery fails, which can lead to extra strain on the main battery.
Consult your mechanic to test both batteries before replacing them.
Final Answer
Yes, many newer Jeep Compass models, especially those with Start/Stop technology, have two batteries—a main battery and an auxiliary battery. If you’re experiencing electrical issues or ESS malfunctions, it’s a good idea to have both batteries checked.
Also Check:
• Does a 2019 Jeep Grand Cherokee Have Two Batteries?
• Does the Jeep Compass Have 2 Batteries?
