ROX 01 12V Battery Location, Low Voltage Warning & Jump-Start Safety

If a ROX 01 will not wake up, shows a low-voltage warning, or will not enter READY mode, the cause is often a weak 12V battery rather than the high-voltage traction battery. This guide explains where the 12V battery is, what the official ROX manual says about jump-starting, and what an owner can safely check before calling for help.

Where is the ROX 01 12V battery?

According to the official ROX 01 User Manual (section 8.3.3, "Battery"), the 12V battery is located on the left side of the trunk. To reach it, remove the luggage compartment pad and take out the tool box. The manual identifies this battery as a lithium-ion battery, not the conventional lead-acid type used in most petrol cars — one reason ROX applies stricter rules around charging and jump-starting it than owners may expect from older vehicles.

The second-row 12V accessory power socket, in the lower part of the second-row air-conditioning control panel, is a separate output socket for powering small devices rated up to 180 W. It is not a jump-start or charging point for the vehicle's own 12V battery.

Signs of a weak 12V battery

• •The vehicle does not unlock normally, or key/app commands do not respond.
• •A touchscreen does not start, or reboots repeatedly.
• •The instrument panel shows a low-voltage or battery-fault message.
• •READY mode does not appear, or the gear selector stays unavailable.
• •Several unrelated warnings appear at the same time.
• •The problem shows up after long parking, cold weather, repeated short trips, or aftermarket accessories left connected.

These symptoms suggest a weak 12V battery, but they can also point to other electrical faults — they are a reason to check carefully, not a confirmed diagnosis on their own.

Before you try anything

• •Park safely, select P and apply the parking brake if the vehicle responds.
• •Switch off climate control, lights and infotainment if the vehicle is awake.
• •Check whether an aftermarket device — dashcam, OBD dongle, tracker, inverter, camping equipment — is left connected to a 12V socket or the diagnostic port; these can drain the battery even while parked.
• •Look for smoke, a burning smell, water ingress, crash damage, or a swollen or leaking battery.
• •Check whether a battery-fault warning light is on.

Can the ROX 01 be jump-started?

This is stricter than the jump-start advice familiar from older lead-acid-battery cars. If the ROX 01 will not wake up or start, the manual's own instruction is to contact the ROX Service Center, not to attempt a booster pack, another vehicle, or a home charger on the 12V battery. General safety background (not ROX-specific) explains part of why: vehicles with battery-management systems can route external power through control modules not designed for it, and lithium-ion 12V batteries can be damaged by charging methods that are safe for lead-acid batteries.

Never use the second-row 12V accessory socket, the high-voltage battery, the V2L/external-discharge system, or any orange high-voltage cable or component as a jump-start point or power source. The manual does not describe any of these as jump-start connections, and the high-voltage system must never be touched by an owner.

If the vehicle is serviced and wakes up

Once the ROX Service Center has addressed a 12V battery issue, let the vehicle stabilize and confirm READY mode appears with no remaining warning. If a low-voltage warning returns, ask the service center to test the 12V battery and check for a parasitic drain — a device or fault that keeps drawing power while parked — and review whether an aftermarket accessory contributed to the problem.

When to call ROX Service Center or roadside assistance

• •The vehicle remains unresponsive.
• •READY mode does not appear after the vehicle wakes up.
• •A low-voltage or battery-fault warning is showing, or returns after service.
• •A high-voltage warning appears at any point.
• •The vehicle was exposed to flooding, water ingress, fire or crash damage.
• •The 12V battery looks swollen, leaking, corroded or unusually hot.
• •The gear selector will not move out of P, or a powered door/tailgate is stuck in an unsafe position.

Reducing future low-12V problems

• •Do not leave aftermarket accessories — dashcams, trackers, inverters, camping equipment — connected to a 12V or OBD port for extended parking, unless installed and confirmed by ROX.
• •Follow ROX's guidance for long-term parking or storage.
• •Avoid leaving the high-voltage battery near empty for long periods.
• •Ask the service center to check the 12V battery at scheduled maintenance visits — see the ROX 01 maintenance guide for the full service schedule.
• •If the 12V battery needs replacing, have it done at an authorized ROX Service Center with the correct specification, as the manual instructs.

What to note before contacting service

• •The exact warning message shown on the instrument panel.
• •Whether the vehicle enters READY mode at all.
• •Whether the app shows the vehicle as connected or offline.
• •Any aftermarket device connected to a 12V socket or the diagnostic port.
• •Whether the vehicle was charging, and its current charge level.
• •How long the vehicle had been parked, and the outside temperature.
• •Any recent service visit or software update.