Land Rover Defender Battery: Specs, Fitment & Common Faults

A genuinely important warning: an AGM battery requires a specific charger, since a standard lead-acid charger can genuinely destroy it through overcharging — plus a distinctive finding that simply leaving the key in the vehicle can drain the battery.

Illustration for editorial purposes

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OEM Part Number: Type 019 AGM

Accuracy note: The current Defender L663 (2020 on) uses a 353 mm type 019 AGM (95Ah / 850A, Varta A5 / Yuasa YBX9019) on every engine, which must be registered with the car's battery monitor; mild-hybrid and P400e versions add a second small auxiliary battery. The classic Defender takes a large standard battery: 105Ah / 800A (Varta H17, 330 mm) on the Td5, and 75Ah (Land Rover LFS75) or 95Ah AGM on the 2.2 / 2.4 Puma. Fit AGM for AGM. Check the three-digit type code, Ah and CCA printed on the battery you are removing before ordering — this model was built in more than one size.

L663 (2020 on), D200 / D250 / D300, P300 / P400	Type 019 AGM (95Ah / 850A, Varta A5). Aftermarket: Yuasa YBX9019 AGM (95Ah / 850A); Varta A5; Bosch S5A 130
L663 mild hybrid and P400e PHEV auxiliary	Small AGM auxiliary battery (Varta AUX14 13Ah class) — confirm via VIN
Classic Defender Td5 (1998–2007)	Type 019 / 017 standard (105Ah / 800A, Varta H17 / H16). Aftermarket: Yuasa YBX5019 (100Ah / 900A); Varta H17; Bosch S4 013
Classic Defender 2.2 / 2.4 Puma (2007–2016)	Land Rover LFS75 (75Ah / 600A) or 019 AGM (95Ah / 850A, Varta A5). Aftermarket: Yuasa YBX9019 AGM (95Ah / 850A); Varta A5; Bosch S5A 130

Genuinely useful to know: a Land Rover Forums member directly confirmed the battery is located under the passenger seat (not the engine bay), accessed via moving the seat forward, removing a cover, and undoing 10mm post bolts — the seat itself doesn't need removing, though the working space is tight.

Land Rover Defender Battery: The Part Everyone Blames First, Not Always Correctly

On the Land Rover Defender, more non-starts get pinned on the battery than on any other single component, and that assumption is correct often enough to justify checking it first. It's not always the real cause, though, so it's worth confirming before spending money on a replacement that doesn't fix the problem.

Before you buy: battery size, capacity and type (standard vs AGM/EFB for stop-start systems) vary by trim and engine. Always confirm against your VIN before ordering.

Land Rover Defender Battery: What It Does

On the Land Rover Defender, every engine start and every moment the electrical systems run without the engine turning draws on the 12V battery. Stop-start puts far more demand on that battery than older designs, given how often the engine cycles off and on — hence the need for an AGM or EFB battery instead of a standard type.

Land Rover Defender Battery: Watch: Replacing It

🎬 Watch: Land Rover Defender L663 battery replacement and battery learning

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Filmed on a 2022 Defender, including the battery-learning step.

Land Rover Defender Battery reference plate

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A Genuinely Important Warning Worth Knowing About Charging This Battery — Land Rover Defender Battery

This is genuinely important to know before putting this battery on charge yourself: if your car uses an AGM battery, a standard lead-acid charger can genuinely destroy it by overcharging, since AGM batteries have different charging requirements entirely. Worth confirming you have a charger specifically designed for AGM batteries before connecting one, particularly if the battery has been deeply discharged and will take some time to recover.

A genuinely distinctive finding worth knowing: simply leaving the key physically inside the vehicle, even without starting the engine, has been documented draining the battery on some models — something is genuinely kept active by the key's presence for reasons not fully understood by owners, worth removing the key entirely from the car when it's parked for any length of time rather than leaving it in the ignition or nearby.

It's also genuinely worth knowing that opening a door wakes up a significant number of onboard computer modules each time, drawing meaningful power — worth propping a door open rather than repeatedly opening and closing it if accessing the car frequently over a short period, such as while camping.

Land Rover Defender Battery: Warning Signs, DIY Difficulty & Aftermarket Advice

These are the same regardless of make or model — see our full Battery Guide for warning signs to watch for, confirming fitment against your VIN, and matching the right technology (standard, EFB, AGM) when buying aftermarket.

More Land Rover Battery

The same part, covered across other Land Rover models.