Introducing Leo: the Plug & Play Battery Life Extender

Let's save our batteries, for our wallet, and for our world

As much as 50% longer battery lifespan

Reduce waste and save money

Fully automatic. Works with all chargers.

Award-winning technology that increases the battery lifespan of all your devices

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Shockingly, about 1/3 of smartphones are replaced because of the battery.
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And this doesn't even include all other battery powered devices.
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But.. large corporates don't even care. For them, it means more profit.

Stop planned e-waste!

One of the winners of the EU Green Challenge

One of the biggest international competitions for smart solutions for a sustainable future

We are Reuben and Jardo, creators of Leo: the Plug & Play Battery Life Extender.

‍We feel very fortunate being able to develop Leo in the distinguished Demonstrator Lab at renowned VU University in Amsterdam.

We're also thankful for being awarded entrance to both the global Rockstart Accelerator Program and the Amsterdam Centre for Entrepreneurship Incubator.

Reuben mastered in sustainable energy technology and is passionate about engineering new, sustainable solutions. He successfully pioneered in solar powered air-to-water tech through his start-up Solaq, and offered sustainable solutions for engineering applications through Sustainable Eyes.

Fun fact: Reuben went to the same high school as Jardo, but they never met. Reuben already graduated while Jardo was in his first year. They met 15 years later, working on sustainable technology!

Jardo double mastered in Physics (cum laude) and SBI in Energy & Sustainability, during which he received the national award for being 'the Most Innovative Student of the Netherlands'. He founded Liion Power during his masters and happily accepted the invitation to tour and work in Silicon Valley on sustainable solutions.

Fun fact: Jardo also was the National College Boxing Champion and is training for his Black Belt in Kung Fu. Oh wait, that's not fun. That's just scary.

We can't wait to now launch the product we have dreamed of ever since doing our masters. Hopefully together with you!

Join over 1474 people who want to save their battery

Did you know that charging to 100% is bad for your batteries?

A battery that is charged to 100% is under high chemical tension. This accelerates battery wear.

Did you know that overnight charging is bad for your batteries?

The battery not only charges to 100%, it also stays under high chemical tension for hours, making things even worse. Still, almost all of us charge overnight anyways, because it is convenient and there is no real alternative.

Did you know that fast-charging is bad for your batteries?

Faster charging means more battery wear, and it also elevates the battery temperature. High temperatures are the worst for your battery! Besides, why would you want to charge fast if you have 7 hours to charge your battery overnight?

Leo provides a healthy diet for all your batteries

Leo is able to measure the charging pattern of all your devices and then alters the charging to optimize for long-term battery health. And no worries: you can always override Leo to switch to fast-charging to 100% when needed!

So, how does it work?
‍Click to read more

For a battery, fast-charging, charging to 100% and sitting in a fully charged state are not healthy. Leo autonomously implements and combines several widely accepted best practices for long-term lithium-ion battery health, for all your USB-C devices:

Night break at ~80% before topping up in the morning (similar to Apple night charging)

Charging limit at ~90% to avoid fully-charged batteries (similar to Tesla/Samsung charge limit)

Adaptive charging speed (charging slower when possible, and faster when needed, and dependant on the battery and external temperature)

Leo can also do this:

Measure and analyze data such as the current and voltage at the charger level, and the charging protocol. Leo can function as a USB multimeter!

Charge, measure and save the batteries of all your USB-C devices. Use it for your smartphone, e-reader, headphones, speakers, tablet or even your PS5 controller

Perform Over-the-Air firmware updates to add more features over time through our App, as we continue to improve our algorithms using AI

Ghost-mode button; if pressed Leo will fast-charge your battery to 100%, pretending it is not there. You never need to unplug Leo

99% of devices implement none of these methods. The 1% that do only do a part of it. Our goal is to change the battery industry from a linear mindset to a sustainable mindset. We are happy that big organisations like Apple and Samsung are finally starting to take more steps in their battery macro management to prevent battery degradation. We want to take this a step further by combining these methods, improve on them and give you a solution that will work on all your devices, not just some smartphones.

Frequently Asked Questions

Lab tests at the VU University in Amsterdam show as much as 50% increased lifespan!

‍Data from AccuBattery, one of the most widely used battery analytics applications available, also confirms our findings.

Our smart-charging device helps keep the Lithium-Ion battery of all your devices healthy.

Leo's algorithm automatically implements all the best-practices for battery lifespan optimization and charges with a focus on reducing battery degradation.

No more worrying about overnight charging
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No more nights out with a dead battery
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No more buying new devices because of planned obsolescence