CGI : Gwenn Bienvenu
The project:
Reusing batteries to make power banks.
Huge numbers of batteries are thrown away or recycled even though they could be reused while still in good condition.
LIOVA is an open source project.
Which batteries?
Household batteries from digital devices, such as smartphones, laptops or power tools.
We reuse batteries that are still in good condition and keep a good capacity.
Key figures
5.3 billionmobile phones became waste in 2022.Source: WEEE Forum
Only 45%of portable batteries sold in Europe were collected for recycling in 2022.Source: Eurostat
1.9 millionlitres of water per tonne of lithium produced.Source: Wikipedia
Explore LIOVA
Rotate the case, zoom in, then open the exploded view to see how the parts fit together.
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Parts
Case version 2.1, designed for 3D printing.
Maker? Build your own LIOVA
Want to give smartphone batteries a second life? Download the LIOVA 3D files for free.
With a 3D printer (at a fablab, for example) and a few components, you can assemble a responsible, affordable and durable power bank yourself.
To build your LIOVA, follow the instructions below:
Handle lithium-ion batteries with care: only use intact, non-swollen batteries.
Prototyping
Recovering, testing and assembling batteries at the fablab, all the way to the first 3D printed case.
Partner company
We work with Phoner, a company specialised in repairing and refurbishing smartphones.
Phoner would be ready to sell LIOVA in its stores, and to handle assembly and labour.
Awards
June 2026
South KoreaTrip to Samsung in Korea
Visit to the Samsung Innovation Museum in Suwon and the Umyeon R&D campus, and a mentoring session with Mauro Porcini, Samsung's Chief Design Officer.
February 2026
MilanGlobal Ambassadors Samsung Solve for Tomorrow
LIOVA is one of 10 teams selected worldwide by Samsung and the International Olympic Committee, in the Accessibility and Environment category, during the Milano Cortina 2026 Games.
October 2025
MilanWinners of Solve for Tomorrow Europe
One of the five winning teams of the first pan-European edition of the Samsung Solve for Tomorrow competition.
6 May 2025
Sustainable development award
French Engineering Science Olympiad, with our final-year STI2D project at Lycée Joliot-Curie in Rennes.
Who are we?
We met in our final year of the STI2D programme at Lycée Joliot-Curie in Rennes. LIOVA was our final-year project.
Simon Cénet
Co-founder
3D modelling, communication and external relations: he designs the case with Evan, carries the project's image and liaises with partners, juries and the press.
From Vitré, Bachelor's student in Audiovisual at Ynov Rennes and freelance videographer.
simoncenet.frEvan Dessables
Co-founder
Research and 3D modelling: he studies the batteries and electronic components, and designs the case with Simon.