Your Phone Battery Loses Capacity Every Time You Keep It Fully Charged.
redefining phone charging
What does it do?
Chargie is a USB device that stops phone battery degradation by automatically optimizing the charge process,
while you sleep.
Technically speaking, its app and hardware pull the plug when the battery reaches your desired percentage, thus greatly increasing its lifespan.
It's not magic, but science (see below).
simple is magic
How Do I Use It?
1. Connect the Chargie between your charger and phone.
2. Install the app
3. Connect to Chargie and set the limit in the app.
4. Go to sleep
Chargie’s hardware and software will communicate through Bluetooth and will cut power at the level you select by dragging the slider in the app.
Effect: the lifespan of your battery will be hugely extended, and safety will be maximized. Sony already uses a mild version of this charge limiting technique, Apple is about to implement it in the future version of iOS (See references  and )
But most phone manufacturers don’t. And probably never will.
Even if you choose to charge to 100%, our hysteresis algorithm performs an optimized, stress-free charge for both long term battery life and daily phone usability.
No root access needed, because power gets cut off externally.
Chargie is the only system on the market that has the ability to limit a stock phone's charging process to save its battery.
Chargie is a device
It's a tool for those
who dig concepts like
long term technology usage,
– Shipped by Low Cost DHL Express (~2-4 days) –
Chargie – the phone charge limiter – Founder Edition – Blue
All battery manufacturers state that charging your phone every night to 100% and keeping it this way for 8 hours stresses the battery and shortens its lifespan.
Chargie is the only Bluetooth switch that physically halts the charging process to your chosen value (the lower, the better), so you can actually use your phone for up to 10 years without noticeable battery drop.
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the science behind
How Chargie Works
In a regular phone, charging is typically driven up to 100% and then kept at that very high state (around 4.35 volts) until the user unplugs it. Indeed, the battery is protected from overcharging, but not in an optimal way.
Actually, the way most phone manufacturers charge their devices’ battery is far from optimal. They just don’t care much about lifespan, since phones are thought to be disposable after the next version gets released.
Keeping the charge level to 100% every night induces a voltage-related stress and damages the internal lithium lattice of the battery, at a molecular level.
Limiting charge below 100% or releasing it once it’s topped up has hugely beneficial effects for the lifespan of the battery. An optimized charging process can take a normal phone battery from 250 cycles to more than 1000, before it shows signs of degradation (table courtesy of batteryuniversity.com ).
This has been well documented by the scientific community. Electric car manufacturers like Tesla already avoid charging to 100% by default. They say it’s fully charged, but it’s actually less. Microsoft has even implemented charge limiting in Surface tablets , Sony in latest-generation Xperia and Lenovo in laptops. Apple recommends you do not charge your phone fully every night.
Chargie does more than charge limiting
Besides limiting the charging process, Chargie’s hysteretic algorithm makes sure that even if you charge to 100%, the process is stopped until the battery discharges down to 95%, and then reapplied. This is way less stressful for the battery and dramatically prolongs its lifespan. You can adjust the allowed discharge percentage manually from the app’s Settings menu.
Practically, it is best if you only charge to 90%. If you do so, Chargie’s default hysteresis is 1%, and will yield much better results in the long run, from both a lifespan and daily usability perspective.
Ideally, the lower the daily charge, the better it is for the battery.
By applying hysteretic charging, the risk of battery swelling and fires is greatly reduced (unless the battery itself has a physical defect). Read more about it on Google.
the most frequent use cases
How Chargie Can Help You
Features and Tech
Chargie relies on Android, Bluetooth and a powerful 4.8A electronic switch to deliver current from the charger to the phone, and to stop it when the charge level has reached the desired value.
Here are some of its unique characteristics:
What Real Customers Say
- you can check these reviews are real by visiting the Google Play app page -
Service & Warranty
If you use it properly (don’t overload), Chargie will last a lifetime. However, should you have any issues in the first 2 years, we’re here to help by repairing or replacing your defective unit.
If for whatever reason you’re not satisfied with Chargie within 30 days, just ask for a refund.
Made in Europe
*if ordered during a weekday (Mon-Fri, 8am – 3pm EEST), except local legal holidays
*DHL free shipping for orders of at least 5 units
Message from the founder
Building something from scratch is not an easy thing.
You don’t really know what it’s going to look like, how it’s going to behave, what the real challenges are, but that’s the game.
No matter how much you think you know about your product, truth is you only have an idea about it.
Your product grows up with you, takes you back and forth, left and right. It hits you against the wall and then comes back even better, each time.
That’s why creativity and entrepreneurship are embraced by a few crazy ones who either have the guts or the unconsciousness to pursue their lifelong dreams at the risk of everything.
Money is just a tool for them, anyway.
Ovidiu Sandru, founder
Photos (c) Ovidiu Sandru, Alena Koval/Pexels