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MINI Electric (Cooper SE) battery: warranty, size and degradation (UK)
Published · Last updated · based on 29 sourced Cooper SE data points and 33 sources
The first MINI Electric is a popular used city EV with a small battery. This guide covers which battery a car has (and why the 2024-on MINI is different), the MINI UK warranty, the battery recalls, how fast the battery loses capacity in real tests, and how to judge a test result.
All figures with method and date: used MINI Cooper SE battery data. Going to a viewing? Make a printable list of questions for the seller.
1. Identify the car and battery
| Version | Usable battery | Nominal | Chemistry | Available to order in the UK (EV Database) | Source |
|---|---|---|---|---|---|
| Cooper SE (F56) | 28.9 kWh | 32.6 kWh | NMC | Mar 2020 – Mar 2021 | EV Database |
| Cooper SE (F56, updated) | 28.9 kWh | 32.6 kWh | NMC | Mar 2021 – Feb 2024 | EV Database |
| Cooper E (J01, new generation) | 36.6 kWh | 40.7 kWh | NMC | since Mar 2024 | EV Database |
| Cooper SE (J01, new generation) | 49.2 kWh | 54.2 kWh | NMC | since Mar 2024 | EV Database |
EV Database UK listings, checked 2026-10-31. Dates are order dates; cars were registered later.
Every F56 Cooper SE has the same 32.6 kWh battery, so you can compare any two directly. All the test data on this page is for the F56. The 2024-on Cooper E and SE share the name but are a different car with bigger batteries; we have no test data for them yet.
2. Check the battery warranty
MINI UK: high-voltage battery covered for 8 years or 100,000 miles against defects and excessive capacity loss; the warranty handbook sets the threshold at below 70% as measured by a MINI repairer. (MINI UK, checked 2026-10-31)
- MINI's page counts the 8 years from first registration. The first Cooper SEs were registered in 2020, so they reach the limit from 2028.
- MINI's handbook judges the capacity loss as measured by a MINI repairer, so a third-party test is useful evidence but isn't the measurement MINI uses for a claim.
- Our battery warranty checker works out the time and mileage left from the registration date.
3. Check the recalls
DVSA's recall file, downloaded 2026-10-31, lists these battery recalls for the F56 MINI Electric (DVSA):
- R/2024/279 (8 July 2024): the seal on the high-voltage battery housing may let moisture in, which can bring up a warning and in some cases switch the battery off while driving. The seal is checked and faulty parts replaced. It lists 508 MINIe hatchbacks built 2 June 2020 – 5 December 2023 and 1 convertible.
- R/2024/337 (4 September 2024): a battery management software update to better handle an insulation fault in the high-voltage battery. It lists 24,483 MINIe cars built 27 November 2018 – 4 January 2024 and 150 convertibles – in practice most UK cars.
For the 2024-on Cooper E/SE (J01) the file lists five small high-voltage cell-module recalls between September 2024 and September 2025 (R/2024/366, R/2024/499, R/2025/165, R/2025/187 and R/2025/322; 10–177 UK cars each, also covering the Aceman). Faulty modules are replaced; under R/2024/366 the car must not be charged until it is fixed.
Run the free GOV.UK recall check on the registration (GOV.UK) and ask for the MINI dealer record showing the work was done.
4. How fast the battery degrades
| Mileage | Median SoH | Central 99% of cars |
|---|---|---|
| 50,000 km (≈31,069 mi) | 94.1% | 87.9%–97.4% |
| 100,000 km (≈62,137 mi) | 90.1% | 82.2%–95.5% |
| 150,000 km (≈93,206 mi) | 87.1% | 77.5%–93.9% |
8,554 AVILOO tests of the Cooper SE (AVILOO GmbH, 2026-09-03). The band is the range of the middle 99% of tested cars.
- The MINI's median at 100,000 km is lower than the VW ID.4's 92.5% in the same report. A small battery goes through more charge cycles per mile, which is one likely reason, so judge a MINI against MINI figures, not against bigger EVs.
- On 21 UK dealer AVILOO certificates (9,254–68,489 km) we have 95.2%–97.9%. 5 owner-reported readings from a German MINI forum (14,500–35,300 km) range from 92.0%–98.0%.
- Compare with other small EVs on the battery degradation chart, or get a quick estimate with the battery health estimator.
- As a rule of thumb for all EVs, ADAC expects at least 92% at 50,000 km, 88% at 100,000 km, 84% at 150,000 km, 80% at 200,000 km (ADAC).
5. Get a battery reading you can trust
On the 21 UK certificates the car's own battery figure (from its battery management system, BMS) was higher than AVILOO's independent result on 18, lower on 0 and within half a point on 3; the car often showed 98–100%. So a high reading from the car or an OBD app is a good sign, not proof.
- Ask for an independent test such as an AVILOO battery test (AVILOO GmbH). UK options and prices are on our UK battery test comparison.
- Owners read the battery with OBD apps such as mi3 or Electrified; readings move with temperature, so compare like with like.
- Read any certificate the seller gives you with our certificate guide.
Every Cooper SE single-car result we have (n=1 each)
| Car | Mileage | SoH | Sample | Source (date) |
|---|---|---|---|---|
| Cooper SE 32.6 kWh gross, UK car (cert 5488) | 9,254 km ≈ 5,750 mi | 97.9% car's own figure: 100.0% | n=1 | Car360 (2026-02-16) Single car (n=1). Published mileage 5,750 miles. Car's own BMS SoH on the same certificate: 100%. |
| Cooper SE 32.6 kWh gross, UK car | 10,900 km ≈ 6,773 mi | 97.1% car's own figure: 98.0% | n=1 | Car360 (2026-01-06) Single car (n=1). Published mileage 6,773 miles. Car's own BMS SoH on the same certificate: 98%. |
| Cooper SE 32.6 kWh gross, UK car (cert 5449) | 13,147 km ≈ 8,169 mi | 97.8% car's own figure: 100.0% | n=1 | Car360 (2026-02-13) Single car (n=1). Published mileage 8,169 miles. Car's own BMS SoH on the same certificate: 100%. |
| Cooper SE (F56) 28.9 kWh usable (reg. 10/2020) | 14,500 km ≈ 9,010 mi | 98.0% | n=1 | MINI F56 Forum – mini-f56-forum.de (posts dated 2024-10-29 to 2024-11-11) Owner-reported, n=1. 2024-11-11, Electrified app; 99% AC charging. |
| Cooper SE 32.6 kWh gross, UK car (cert 5081) | 17,807 km ≈ 11,065 mi | 96.9% car's own figure: 98.0% | n=1 | Car360 (2026-01-20) Single car (n=1). Published mileage 11,065 miles. Car's own BMS SoH on the same certificate: 98%. |
| Cooper SE (F56) 28.9 kWh usable (car for sale) | 18,000 km ≈ 11,185 mi | 92.0% | n=1 | MINI F56 Forum – mini-f56-forum.de (posts dated 2026-03-20 to 2026-08-08) Owner-reported, n=1. 2026-08-08: prospective buyer quotes a DEKRA report on a car with about 18,000 km; another member notes winter readings tend to be lower. |
| Cooper SE 32.6 kWh gross, UK car (cert 6278) | 18,052 km ≈ 11,217 mi | 97.3% car's own figure: 99.0% | n=1 | Car360 (2026-04-13) Single car (n=1). Published mileage 11,217 miles. Car's own BMS SoH on the same certificate: 99%. |
| Cooper SE 32.6 kWh gross, UK car (another) | 21,168 km ≈ 13,153 mi | 96.8% car's own figure: 98.0% | n=1 | Car360 (2026-02-20) Single car (n=1). Published mileage 13,153 miles. Car's own BMS SoH on the same certificate: 98%. |
| Cooper SE 32.6 kWh gross, UK car (cert 5546) | 21,739 km ≈ 13,508 mi | 96.4% car's own figure: 97.0% | n=1 | Car360 (2026-02-20) Single car (n=1). Published mileage 13,508 miles. Car's own BMS SoH on the same certificate: 97%. |
| Cooper SE 32.6 kWh gross, UK car (cert 6142) | 22,454 km ≈ 13,952 mi | 97.6% car's own figure: 100.0% | n=1 | Car360 (2026-03-26) Single car (n=1). Published mileage 13,952 miles. Car's own BMS SoH on the same certificate: 100%. |
| Cooper SE 32.6 kWh gross, UK car (cert 5553) | 22,529 km ≈ 13,999 mi | 96.0% car's own figure: 96.0% | n=1 | Car360 (2026-02-23) Single car (n=1). Published mileage 13,999 miles. Car's own BMS SoH on the same certificate: 96%. |
| Cooper SE 32.6 kWh gross, UK car (cert 5101) | 23,781 km ≈ 14,777 mi | 96.0% car's own figure: 96.0% | n=1 | Car360 (2026-01-21) Single car (n=1). Published mileage 14,777 miles. Car's own BMS SoH on the same certificate: 96%. |
| Cooper SE 32.6 kWh gross, UK car (cert 5778) | 26,545 km ≈ 16,494 mi | 96.3% car's own figure: 97.0% | n=1 | Car360 (2026-03-09) Single car (n=1). Published mileage 16,494 miles. Car's own BMS SoH on the same certificate: 97%. |
| Cooper SE 32.6 kWh gross, UK car (cert 5493) | 27,352 km ≈ 16,996 mi | 95.5% car's own figure: 95.0% | n=1 | Car360 (2026-02-17) Single car (n=1). Published mileage 16,996 miles. Car's own BMS SoH on the same certificate: 95%. |
| Cooper SE 32.6 kWh gross, UK car (cert 6277) | 30,259 km ≈ 18,802 mi | 96.3% car's own figure: 97.0% | n=1 | Car360 (2026-04-13) Single car (n=1). Published mileage 18,802 miles. Car's own BMS SoH on the same certificate: 97%. |
| Cooper SE (F56) 28.9 kWh usable | 32,000 km ≈ 19,884 mi | 97.7% | n=1 | MINI F56 Forum – mini-f56-forum.de (posts dated 2024-10-29 to 2024-11-11) Owner-reported, n=1. Battery certificate when bought used, July 2024 (posted 2024-10-29; certificate issuer not named). |
| Cooper SE (F56) 28.9 kWh usable | 33,100 km ≈ 20,567 mi | 97.0% | n=1 | MINI F56 Forum – mini-f56-forum.de (posts dated 2026-03-20 to 2026-08-08) Owner-reported, n=1. 2026-03-20 (method not stated). |
| Cooper SE (F56) 28.9 kWh usable | 35,300 km ≈ 21,934 mi | 94.0% | n=1 | MINI F56 Forum – mini-f56-forum.de (posts dated 2024-10-29 to 2024-11-11) Owner-reported, n=1. 2024-10-31, mi3 app; mostly charged to 100% at home. |
| Cooper SE 32.6 kWh gross, UK car (cert 5019) | 38,796 km ≈ 24,107 mi | 96.1% car's own figure: 97.0% | n=1 | Car360 (2026-01-15) Single car (n=1). Published mileage 24,107 miles. Car's own BMS SoH on the same certificate: 97%. |
| Cooper SE 32.6 kWh gross, UK car (cert 5076) | 44,127 km ≈ 27,419 mi | 96.4% car's own figure: 98.0% | n=1 | Car360 (2026-01-19) Single car (n=1). Published mileage 27,419 miles. Car's own BMS SoH on the same certificate: 98%. |
| Cooper SE 32.6 kWh gross, UK car (cert 5507) | 46,961 km ≈ 29,180 mi | 95.9% car's own figure: 97.0% | n=1 | Car360 (2026-02-18) Single car (n=1). Published mileage 29,180 miles. Car's own BMS SoH on the same certificate: 97%. |
| Cooper SE 32.6 kWh gross, UK car (cert 6412) | 50,871 km ≈ 31,610 mi | 96.8% car's own figure: 100.0% | n=1 | Car360 (2026-10-08) Single car (n=1). Published mileage 31,610 miles. Car's own BMS SoH on the same certificate: 100%. |
| Cooper SE 32.6 kWh gross, UK car (cert 5486) | 52,721 km ≈ 32,759 mi | 95.8% car's own figure: 97.0% | n=1 | Car360 (2026-02-16) Single car (n=1). Published mileage 32,759 miles. Car's own BMS SoH on the same certificate: 97%. |
| Cooper SE 32.6 kWh gross, UK car (cert 5369) | 58,562 km ≈ 36,389 mi | 96.0% car's own figure: 98.0% | n=1 | Car360 (2026-02-09) Single car (n=1). Published mileage 36,389 miles. Car's own BMS SoH on the same certificate: 98%. |
| Cooper SE 32.6 kWh gross, UK car (cert 6112) | 59,235 km ≈ 36,807 mi | 95.2% car's own figure: 96.0% | n=1 | Car360 (2026-03-25) Single car (n=1). Published mileage 36,807 miles. Car's own BMS SoH on the same certificate: 96%. |
| Cooper SE 32.6 kWh gross, UK car (third) | 68,489 km ≈ 42,557 mi | 95.8% car's own figure: 98.0% | n=1 | Car360 (2026-02-11) Single car (n=1). Published mileage 42,557 miles. Car's own BMS SoH on the same certificate: 98%. |
21 UK dealer AVILOO certificates (Car360) and 5 owner-reported readings. Single cars show the spread, not an average. Every row is also on the Cooper SE data page.
6. Replacement cost
We have not found a published UK price for a new Cooper SE battery, from MINI or an independent specialist, that shows how it was worked out, so we don't quote one. Inside the warranty a failed or excessively degraded battery is MINI's cost; outside it, get a written quote after diagnosis. Our EV battery replacement cost guide explains what is known.
Also see: general used-EV battery checklist · Peugeot e-208 & Vauxhall Corsa-e battery check · Renault Zoe battery check · BMW i3 battery check · battery problem after buying: your rights (UK) · all models compared.
Sources used on this page
33 sources · 29 data points: 5 from non-AVILOO methods, 24 measured with AVILOO tests.
- Large test datasets (1 source, 3 data points): AVILOO GmbH
- Single-car tests (21 sources, 21 data points): Car360, [2], [3], [4], [5], [6], [7], [8], [9], [10], [11], [12], [13], [14], [15], [16], [17], [18], [19], [20], [21]
- Owner-reported (2 sources, 5 data points): MINI F56 Forum – mini-f56-forum.de, [2]
- Manufacturer (1 source): MINI UK
- Other (specs, guides, news, surveys) (8 sources): EV Database, [2], [3], [4], DVSA, GOV.UK, AVILOO GmbH, ADAC
Owner-reported and listing values are single cars (n=1) read from the car, an app or an OBD tool – useful examples, not averages. Range-retention figures (Recurrent) measure range, not capacity. Full details: methodology & all sources.
We are not paid by the battery-test providers mentioned on this page. Links marked "paid link" in the "Useful products and services" box are affiliate links. See our disclosure.
Get this specific car tested
We are not paid by these test providers. How we make money.
Model averages can't tell you about the car in front of you. An independent battery test (typically a short OBD plug-in test, some remote) gives an SoH figure and often a certificate you can use when negotiating.
- AVILOO – Independent OBD-based battery test (FLASH / Premium) with certificate; available via partners in the UK and EU.
- Generational – UK OBD plug-in test with certificate (SoH, range, remaining warranty, cell balance); sold through dealers and independent mobile testers.
- Moba – Postal OBD kit: you run the test yourself and post the box back for a digital battery certificate (Europe – check vehicle support and delivery country).
Prices change – check the provider's site. Provider names are used for identification only. Compare all UK options and prices: EV battery health check UK.
Useful products and services
- Charging cable: check that the car comes with its charging cable(s) at the viewing. If one is missing, replacements are sold separately: Cooper SE charging cables at EV King paid link.
- Tyres: check tread depth and wear at the viewing. To price replacements, search by the size printed on the tyre wall: car tyres at Tyres UK paid link.
- Leasing instead of buying used (UK): if you'd rather not take on an older battery, you can compare electric car lease deals: EV lease deals at Leasing.com paid link.
- Parts and tools: wiper blades, bulbs, 12V batteries and tools for the car you buy: GSF Car Parts paid link (UK).
Some links are paid links: we may earn a small commission at no extra cost to you. This never changes the battery data we show (disclosure).
FAQ
What battery size does the MINI Electric (Cooper SE) have?
The first-generation MINI Electric / Cooper SE (F56, ordered in the UK from March 2020 to February 2024) has a 32.6 kWh battery, of which 28.9 kWh is usable, according to EV Database. The new-generation MINI Cooper sold since March 2024 (J01) is a different car: the Cooper E has 36.6 kWh usable (40.7 kWh nominal) and the Cooper SE 49.2 kWh usable (54.2 kWh nominal).
How long is the MINI Electric battery warranty in the UK?
MINI UK covers the high-voltage battery against material defects and excessive loss of capacity for up to 8 years from first registration or 100,000 miles, whichever comes first. MINI's 2025 warranty handbook treats capacity below 70%, as measured by a MINI repairer, as excessive. The first cars were registered in 2020, so they reach the 8-year limit from 2028.
What is a good battery health (SoH) for a used MINI Electric?
AVILOO's 2026 report covers 8,554 tests of the Cooper SE: median SoH 94.1% at 50,000 km, 90.1% at 100,000 km and 87.1% at 150,000 km. That is lower than for bigger-battery cars such as the VW ID.4; a small battery goes through more charge cycles per mile, which is one likely reason. On 21 UK dealer AVILOO certificates (9,254–68,489 km) we have 95.2%–97.9%.
Are there battery recalls on the MINI Electric?
Yes. DVSA's recall file (downloaded 2026-10-31) lists two for the F56 MINI Electric: R/2024/279, where the battery housing seal may let moisture in and the battery may switch off while driving (508 hatchbacks built June 2020 – December 2023), and R/2024/337, a battery management software update for insulation faults covering 24,483 cars built November 2018 – January 2024. The 2024-on Cooper E/SE has had several small cell-module recalls. Run the free GOV.UK recall check on the registration.
How much does a replacement MINI Electric battery cost in the UK?
We have not found a published UK price for a new Cooper SE battery from MINI or an independent specialist that shows how it was worked out, so we don't quote one. Inside the 8-year / 100,000-mile warranty a failed or excessively degraded battery is MINI's cost. Outside it, get a written quote after diagnosis.
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We currently publish 29 sourced data points for the MINI Cooper SE (last updated 2026-10-31).
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