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Nio's smallest EV just got quicker, smarter, and a lot more future-ready. Firefly, the compact electric brand under Nio, has pushed out a meaningful software update that does more than freshen up menus or tweak minor settings. It lifts motor output on earlier cars, sharpens real-world acceleration, and quietly lays the groundwork for a feature many owners have been waiting on: battery swapping.
The new Aster 1.5.0 update raises peak motor power on existing Firefly EVs to 120 kW, up from 105 kW. In everyday terms, that means older vehicles now match the performance of the refreshed Firefly model introduced in April. Nio says the upgrade is free, delivered over the air, and cuts the 0 to 100 km/h sprint to 7.9 seconds.
That matters because it turns a promise into something drivers can actually feel the moment they pull away from a junction or lean into a motorway merge. Firefly also says testing shows the car now runs from 50 to 100 km/h in 4.61 seconds after the update, a useful measure for overtaking rather than just brochure bragging rights.
The April refresh kept its starting price unchanged at about €15,500, converted from 119,800 yuan at current exchange rates. By giving existing owners the same power boost at no extra cost, Nio is doing something car buyers rarely forget: protecting early adopters from feeling left behind.
The bigger play is battery swap
The most interesting part of this update may not be the extra speed at all. Firefly has added a parking assist function designed to guide the car automatically into Nio's upcoming fifth-generation battery swap stations. That sounds technical, but the implication is simple. Firefly is being prepared for a much tighter link with Nio's wider energy ecosystem.
Nio plans to build between five and 10 pilot fifth-generation swap stations from May to June, with broader deployment expected in July and August. These stations use a newly reworked architecture tailored to the shorter wheelbase of Firefly vehicles, which helps explain why the brand has not yet been able to use the company's existing battery swap network.
Right now, Nio operates 3,846 swap stations across China. The core Nio brand can use all of them, while Onvo has access to most. Firefly, despite sitting under the same corporate roof, still remains outside that system for the time being. This software update is a clear sign that the gap is starting to close.
There is a smaller convenience upgrade tucked into the release as well. The system now improves front trunk access, allowing users to unlock the frunk by tapping a sensor recognition area, though that feature requires extra hardware to be purchased and installed.
Firefly is a young brand, but it is moving fast. Nio unveiled it at Nio Day 2024 on December 21, positioning it as a challenger to urban premium small cars from brands like Mini and Smart. Its first model, also called Firefly, went on sale in China on April 19, 2025.
The brand hit its 50,000th delivery milestone on March 29, roughly 11 months after the Firefly EV entered the market. That is a notable pace for a newcomer, especially one carrying the burden of helping Nio expand overseas. Firefly has already become the group's spearhead for international growth, entering several European markets as well as right-hand-drive countries including Thailand and Singapore.
Its latest monthly numbers were softer. Firefly delivered 4,980 vehicles in April, down 18.61 percent from March. Even so, it still accounted for 16.96 percent of Nio's total April deliveries, which reached 29,356 units.
So yes, this is a software update. But it also feels like something else: a strategic nudge. More power keeps the car competitive today. Swap station readiness could make it far more convenient tomorrow. For a compact EV brand trying to build momentum at home and abroad, that combination matters.
Comments
gearflux
Cool on paper, but is the automated swap parking actually reliable? sounds like a nice gimmick unless the stations and sensors are rock solid, curious how they test it
datastream
Wow, free OTA power boost? didn't see that coming. Battery swap prep is the real kicker — feels like they're planning ahead, hope it rolls out smooth in EU tho
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