MINI Cooper Electric Battery: 36.6 & 49.2 kWh Sizes, Real Range & Charging
Trying to work out which battery the electric MINI Cooper actually runs — and whether you can even buy one in the US? You’re in the right place: here’s the short answer first, then the full picture.
Short answer first, because that’s what you came for: the MINI Cooper Electric comes in two battery sizes — 36.6 kWh usable in the Cooper E (40.7 kWh total) and 49.2 kWh usable in the Cooper SE and JCW Electric (54.2 kWh total). Both packs are NMC, the SE charges at up to 95 kW DC, and real-world range works out near 155 miles for the E and 205 for the SE. One catch if you’re reading from the US: this car isn’t sold there at all — and this page explains why. Everything else — winter range, charging times, UK prices, the 8-year warranty — is right below.
- Cooper E: 36.6 kWh usable · WLTP up to 182 miles · from £26,905
- Cooper SE: 49.2 kWh usable · WLTP up to 242 miles · from £29,105
What battery does the MINI Cooper Electric have?
Two NMC packs cover the whole range — a 36.6 kWh usable unit for the Cooper E and a 49.2 kWh usable unit shared by the SE and the JCW.
MINI quotes the usable figures itself, which saves everyone the gross-versus-usable argument that clouds most electric MINI spec pages. The E’s pack is 40.7 kWh in total; the bigger pack is 54.2 kWh in total. Both run at 400 volts, and both use an NMC cathode — there is no LFP version of this car, whatever a few listings claim.
| Model | Battery (total) | Battery (usable) | WLTP range | DC charging | UK price from |
|---|---|---|---|---|---|
| Cooper E | 40.7 kWh | 36.6 kWh | 179–182 miles | 75 kW | £26,905 |
| Cooper SE | 54.2 kWh | 49.2 kWh | 239–242 miles | 95 kW | £29,105 |
| JCW Electric | 54.2 kWh | 49.2 kWh | 226–250 miles | 95 kW | £35,805 |
Is the battery NMC or LFP?
NMC, in every version. That is the honest trade of this car: NMC gives the energy density a small hatchback needs — 49.2 usable kWh in a car this short is only possible with a dense chemistry — while LFP’s longer cycle life and lower cost go to bigger, heavier cars where the weight penalty matters less. The Aceman, MINI’s small electric crossover, makes the same choice with SVOLT-supplied NMC cells; our MINI Aceman battery guide covers that car’s packs in full.
Where is the electric Cooper built?
In Zhangjiagang, China, by the joint venture between BMW and Great Wall Motor — not by Guangzhou Automobile Group, as some early coverage (and an earlier version of this page) wrongly said. UK production of the electric Cooper and Aceman at MINI Plant Oxford is due to start in 2026, according to BMW’s own announcement. Where the car is built turns out to matter a great deal for American readers, as the US section below explains.
How far does a MINI Cooper Electric actually go?
Settle on roughly 155 miles for the Cooper E and 205 miles for the SE in mixed real-world driving — about 85% of the official WLTP figures.
WLTP numbers are a comparison tool, not a promise. EV Database’s real-range estimates, which model mixed driving rather than a test cycle, put the E at 155 miles and the SE at 205 miles. Cold weather pulls both down — around 130 miles for the E and 170 for the SE in winter conditions — while gentle mild-weather driving can push the SE towards 240 miles.
Which one should you pick, E or SE?
The honest answer depends on one number: your longest regular day. If the car charges at home and your longest routine day is under 100 miles, the E does the job for £2,200 less and gives up nothing in town, where both cars feel identical. If you regularly run 150-mile days or motorway miles, the SE’s bigger pack and faster charging are worth it — the E’s smaller battery works harder per mile and needs charging sooner on every long trip. The JCW buys performance, not range: its WLTP span overlaps the SE’s, so buy it for the 258 hp, not for extra miles.
How fast does the MINI Cooper Electric charge?
A 10–80% top-up takes 28 minutes on the E and 30 minutes on the SE — respectable, not class-leading, and the E’s lower peak matters less than it looks.
The Cooper E peaks at 75 kW DC on MINI’s current technical data (early material quoted 70 kW), the SE and JCW at 95 kW. EV Database’s modelled average across a 10–80% session is about 60 kW for the E and 75 kW for the SE, which is the number that decides your actual stop. At home, both cars take 11 kW AC: a full charge runs about 4 hours 15 minutes for the E and 5 hours 15 minutes for the SE.
Does it have a heat pump?
Yes — a heat pump is standard on the Cooper E and SE, which is not a given at this price and is part of why the winter range penalty above is not worse. Battery preconditioning before a fast charge is the other half of cold-weather charging; use the car’s navigation to route to the charger so the pack arrives warm, and the 28–30 minute figures stay realistic in January.
Can you buy an electric MINI Cooper in the US?
No. The electric Cooper is not sold or listed in the United States, and MINI has announced no US launch for it.
This is the question most readers of this page actually arrive with, so here it is plainly. MINI USA’s electric line-up consists of one model, the Countryman SE ALL4; there is no electric Cooper in the US range. The Cooper Electric is built in China, and cars built there face import conditions that have kept several China-built EVs out of the US market. Oxford production from 2026 changes where the car is made, but BMW and MINI have made no announcement putting it on US sale — treat any article promising an imminent US launch as speculation until MINI USA lists the car. American readers who want an electric MINI today are looking at the Countryman SE, a bigger and more expensive car on a different platform.
What does the MINI Cooper Electric battery warranty cover?
MINI covers the high-voltage battery against manufacturing defects for 8 years or 100,000 miles, and its own FAQ puts the guaranteed capacity at 70%.
Those are MINI’s published terms for the UK: “8 years from first registration or 100,000 miles, whichever occurs first.” The 70% figure deserves a straight explanation. MINI’s own customer FAQ discusses its guaranteed capacity as 70% — meaning that if the pack’s capacity falls below 70% inside the warranty period, the warranty responds. It is the same floor most mainstream makers use, and MINI’s FAQ raises it precisely because upcoming EU rules will demand more.
Is there any real degradation data for this car yet?
No — and any site quoting you a MINI Cooper Electric degradation percentage is inventing it. The car only reached customers in 2024, it is not sold in the US, and the big fleet trackers that publish model-level battery-health data (Recurrent, Geotab) hold no samples of it. What can be said honestly is that the pack is a conventional NMC unit with a liquid-cooled design and a standard 70% warranty floor; the first meaningful state-of-health picture will come from used-market testers in a year or two, not from launch reviews. If you are buying used before then, a battery health report from a MINI dealer is worth more than any number printed online, including ours.
Frequently asked questions
What size is the MINI Cooper Electric battery?
The Cooper E has a 40.7 kWh battery with 36.6 kWh usable. The Cooper SE and JCW Electric have a 54.2 kWh battery with 49.2 kWh usable. MINI quotes the usable figures itself in its technical data.
Is the MINI Cooper Electric battery LFP or NMC?
NMC in every version — E, SE and JCW. There is no LFP version of the J01 Cooper Electric.
What is the real range of the MINI Cooper SE?
About 205 miles in mixed driving, against 239–242 miles on the WLTP cycle. Winter conditions pull it towards 170 miles; gentle mild-weather driving can stretch it towards 240.
How long does a MINI Cooper Electric take to charge?
On a DC fast charger, 10–80% takes about 28 minutes (Cooper E, 75 kW peak) or 30 minutes (SE and JCW, 95 kW peak). At home on 11 kW AC, a full charge takes roughly 4 hours 15 minutes (E) or 5 hours 15 minutes (SE).
Why can’t I buy an electric MINI Cooper in the US?
Because MINI does not sell it there. The car is built in China by BMW’s joint venture with Great Wall Motor, and MINI USA’s only electric model is the Countryman SE. UK production starts in 2026, but no US launch has been announced.
Conclusion
The Cooper Electric’s battery story is simple once the usable figures lead: 36.6 kWh if your days are short, 49.2 kWh if they are not, NMC either way, and charging that is adequate rather than fast. Against small-EV rivals like the Volvo EX30, the MINI trades outright range and charging speed for size and character — a fair trade for the buyer it is aimed at, and a poor one for anyone who needs a long-legged motorway car. The one thing no UK or EU review will tell you is the thing American readers most need to know: for now, this car is not yours to buy.
Quick view: Two NMC packs — 36.6 kWh usable (E) and 49.2 kWh usable (SE/JCW); real range about 155/205 miles; 75/95 kW DC charging; heat pump standard; 8-year/100,000-mile warranty with a 70% capacity floor; not sold in the US.
