Why does my Land Rover Discovery Sport keep getting a low battery warning or going dead?

Short answer: Most Discovery Sport low-battery problems come from short trips, the key kept near the car, or a new battery that wasn't registered. If a tested-good battery keeps going flat, ask the dealer for a parasitic draw test and about Land Rover's service message for the head unit keeping the car awake. 2020 mild-hybrid models are also in recall 26V248000.

Symptom: A 'low battery' message appears, stop-start stops working, or the car won't unlock or start after sitting, sometimes again and again after new batteries.

What to check first

1. Have the battery load-tested. A load test puts a real demand on the battery. A plain voltmeter reading can look fine on a battery that can't deliver power.
2. Think about your driving. Several short trips a day may never refill it.
3. Keep the key well away from the car and lock it.
4. After any new battery, make sure the BMS was reset and the right battery type was fitted.
5. Ask for a parasitic draw test with the car fully asleep, and about service message SSM 74569.
6. Run your VIN at nhtsa.gov/recalls.

Likely causes

1. Short trips that never recharge the battery. Owners and techs said a few 3-mile trips a day aren't enough to refill the battery, especially with stop-start. A battery charger or a longer drive helps.
2. Key fob kept near the car or the car left unlocked. If the smart key sits within range, or the car is unlocked, the electronics can stay awake looking for the key and slowly drain the battery.
3. New battery not registered (BMS reset) or the wrong battery fitted. The battery monitoring system (BMS) tracks the battery's health. After a new battery it has to be told about it with a scan tool. One owner's repeat failures came down to the wrong battery type being fitted.
4. A module that won't go to sleep. Land Rover's own service message SSM 74569 describes the InControl Touch head unit waking the car's network and causing low battery messages. A dealer finds this with a parasitic draw test, which measures how much current the car pulls while parked and asleep.

What it usually costs

Batteries were replaced under warranty in these threads. The owners didn't post out-of-warranty prices, so get a quote that includes the BMS reset.

Is it safe to keep driving?

Yes, if it starts. But a weak battery can leave you stranded and cause odd warnings. On 2020 mild-hybrid models covered by recall 26V248000, a DC-DC converter failure can cut drive power, so get that checked first.

DIY or shop?

Charging the battery, locking the car and moving the key are DIY. Battery registration and draw testing need a Land Rover-capable scan tool, so most owners use a shop.

Recalls, bulletins and complaints in plain words

• Recalls: NHTSA lists recall 26V248000 for certain 2021-2022 E-Pace, 2020 Discovery Sport and many other mild-hybrid (MHEV) Jaguar and Land Rover models: under heavy electrical demand the DC-DC converter can overload and fail, which stops the 12V battery from charging and can lead to a complete loss of drive power. Dealers will update the software for free once the final fix is ready (interim owner letters went out June 17, 2026). NHTSA also lists 26V599000 under the same DC-DC converter part. Recall 20V683000 (certain 2020 Discovery Sport MHEV) covered a 48-volt DC-DC converter short circuit with a software update. If your car is part of a recall, the dealer fixes it for free. Check your VIN at nhtsa.gov/recalls.
• Plain words: The complaint count below shows how often owners reported problems that mention these words to NHTSA. A count is not proof of a defect. NHTSA's complaint lookup returned no data for 2015-2018 and 2025.
• NHTSA complaints: 5 keyword-matched complaints for Land Rover Discovery Sport 2015–2025 (of 48 unique complaints queried, NHTSA complaints API by model year, queried 2026-11-04; keywords: battery, dead, drain, won t start, no start, charging, start stop, auxiliary) (NHTSA returned no data for 6 model-year queries). This counts complaints that mention these words. It is not a defect finding.

What owners report

• In 2019 Discovery Sport: Battery keeps dying, Dealer can't figure it out and is suggesting external pinging... on Reddit r/LandRover, a 2019 owner went through five new batteries since early 2024 and the dealer found no fault with the alternator, fuses or parasitic draw. Replies asked about short trips (the owner's wife mostly did 3-mile trips), keys kept near the unlocked car in the garage, and a Land Rover software bulletin. One owner said an independent shop found the wrong battery had been fitted.
• In Mechanic Keeps Draining Car Battery on Reddit r/AskMechanics, a 2019 Discovery Sport owner got a low battery warning the day after every yearly inspection, at two different shops, and had to drive an hour to recharge it. Replies didn't find a cause.
• In Low Battery Issue on Reddit r/LandRover, a 2021 Range Rover Sport owner asked about constant low battery messages. A Discovery Sport owner said a new battery plus a BMS reset fixed it, and another who'd owned several Discoveries and Discovery Sports said every one had this problem. Replies said once-a-week driving isn't enough and to charge through the car's jump posts, not straight to the battery's negative post, so the BMS sees the charge.

Quick tip

Rule out the easy stuff first: short trips, the key near the car, and a battery that wasn't registered. Then push for a real sleep-current test.

Vehicle focus: Land Rover Discovery Sport, 2015-2025.

Safety / mechanic note

A battery that dies on the road can leave you stranded. Verify with a mechanic.