Why the Cheapest New Electric Cars Use a Different Battery

The cheapest new electric cars on the way to Britain share something under the floor that most buyers have never heard of. When Nissan revealed the Pixo, the company confirmed its new city car uses a 27.5kWh LFP battery, the first time Nissan has fitted lithium iron phosphate chemistry to a car in Europe. It is not alone: the same chemistry sits in the sister Renault Twingo E-Tech Electric built on the same platform, and in every electric and plug-in hybrid model BYD sells in the UK, whose Blade battery is an LFP design. If you are shopping at the affordable end of the EV market, you are increasingly shopping for LFP, and it changes a few things worth knowing.

What LFP actually is

LFP stands for lithium iron phosphate, a battery chemistry that swaps the nickel and cobalt used in most electric car packs for iron and phosphate. Those materials are cheaper and more abundant, which is the whole reason the chemistry shows up in budget cars. Renault has said its LFP-based battery approach helped make the Twingo's pack around 20% cheaper to produce than the alternative, and cost at this end of the market is the difference between a car existing and not existing.

The trade-off is energy density. LFP cells store less energy per kilogram than the nickel-based chemistry in most larger EVs, so a car needs more battery weight for the same range. BYD's own blade-format cells, an unusually compact LFP design, come in at around 150Wh per kilogram, up from 140Wh when the first generation launched. That is why the small EVs adopting LFP tend to be city cars with modest ranges rather than long-distance cruisers.

What it means for charging habits

Here is the part that flips conventional EV advice on its head. Most electric car owners are told to charge to 80% and treat 100% as a rare, long-journey-only setting. With LFP, that advice largely does not apply. The chemistry tolerates regular full charging far better than nickel-based packs, and makers of LFP cars generally encourage charging to 100% routinely, partly because it helps the battery management system keep an accurate reading of the charge level. For the BYD range, the company points to more than 5,000 charging cycles for its LFP Blade battery, against roughly 1,000 to 2,000 cycles for a typical nickel-based pack.

That durability reading matches the wider evidence on battery ageing we set out in our battery health and longevity piece: real-world UK packs average around 95% of original capacity, and degradation is driven more by how a car is used than by any single habit. An LFP city car that gets charged to full every night is, if anything, being treated the way its maker intends.

Practically, then: if your new city EV has an LFP badge, read the manual, and expect to see "charge to 100% regularly" rather than a warning against it. The thing you should still avoid, with any chemistry, is leaving the car parked at 100% or near empty for days on end.

The winter question, honestly

LFP has one genuine weakness, and it is worth stating plainly: the chemistry is more sensitive to cold than nickel-based packs, with power and charging performance dropping noticeably at low temperatures. Renault makes battery preconditioning available on the Twingo, and its own guidance notes the car adjusts the battery temperature to maximise charging power when a route with charging stops is programmed, something it calls ideal for winter conditions. That is the car compensating for the chemistry's cold-weather sensitivity by design.

For a UK buyer this matters most in two situations. On a January morning, expect a bigger chunk taken off the displayed range than the winter figures you may have read about in our winter range myths piece, because the small packs in these cars have less buffer to lose. And at a rapid charger in cold weather, expect slower peak speeds. The Pixo's 50kW maximum DC rate, good for a 10 to 80% charge in around 30 minutes, is a fair-weather figure. Preconditioning, where the car offers it, recovers much of the difference.

Who is actually using it

The chemistry is arriving in Britain on a specific set of cars, and the pattern is clear: it is the affordable end of the market first. The Nissan Pixo pairs its 27.5kWh LFP pack with up to 161 miles of WLTP range, sitting between the Dacia Spring's 155 miles and the Twingo's 163, and the first UK deliveries are expected in early 2027 with prices to be announced from December onwards. The Renault Twingo E-Tech Electric, revealed in November 2025, uses CATL-supplied LFP cells in the same 27.5kWh layout. And every BYD sold in the UK, from the smallest model up, runs on the company's LFP Blade battery, which the brand has used since it began building its own cells in house.

Expect the list to grow. LFP is how manufacturers hit sub-£20,000 price tags without making the cars unusably short of range, and the Pixo is the first Nissan to adopt it in Europe precisely because the entry market is where the economics work. We looked at what that shelf of cars actually buys you in our affordable small EVs guide and our earlier look at small EVs and city driving.

The honest read

LFP is not a downgrade dressed up as a feature, but it is a different set of strengths. You give up some energy density, which means shorter range per kilogram of battery and a bigger cold-weather penalty. You get a cheaper car, a battery that is happy being charged to full, and chemistry rated for thousands more cycles than the packs in the premium EVs. For a second car, a city runabout or a low-mileage household, that trade is an easy one to defend. The one habit change is understanding that the 80% rule you may have learned from other EVs does not apply here, and the one seasonal expectation to set is that winter will bite a little harder. Buy it for what it is: a battery optimised for a life of short trips, full charges and many years of use.