Your Range Rover should be able to sit for two weeks and start first time. When it cannot, the cause is a parasitic drain: something is drawing current after the vehicle should have gone to sleep. Replacing the battery treats the symptom for a few months and then the problem returns.
The usual suspects
- Infotainment module failing to power down, common on early InControl Touch systems.
- Telematics unit repeatedly trying to connect to a server.
- Tailgate or door latch not registering closed, keeping the body module awake.
- Aftermarket accessories: dash cameras, trackers and audio wired to permanent live.
- Water ingress into a module, usually through a blocked sunroof drain.
- A key fob left inside the vehicle, which keeps the keyless system polling.
- A failing auxiliary battery dragging down the main battery through the interconnect.
How we find it
We measure current draw over a full sleep cycle with the bonnet latch tricked closed, then pull fuses one by one while watching the meter. It takes patience, not guesswork, and the result is a fix that lasts.
If your battery has been replaced twice and the problem persists, it was never the battery.
