battery life
and preserves
phone performance.


a project of
Ovidiu Sandru

Lighty Electronics

Because your
loses up to 20%
of its battery capacity,
per year,
due to
overnight charging.

This is a cold fact.


charging on autopilot

How does it work?

smartly prevents
battery degradation
by limiting and delaying
full charging
while you sleep
or work.

inspired by revolutionary tech

Controlled supercharging

Just like electric cars have.

They can run for hundreds of thousands of miles without experiencing major battery degradation in most cases.

If you own an electric car, you know it’s best to not charge it to 100% often, since heat and voltage stress will affect battery health in the long run.

By using Chargie every time you charge your phone overnight, your battery will be at its best capacity for a very, very long time, without needing replacement.
Just like electric cars.

Our in-house developed firmware and app
are based on scientific data and recommendations
from battery manufacturers.

short guide to simplicity

How do I use it?

1. Connect Chargie between
your phone and charger or wireless charging pad.

Chargie is fully compatible with iOS 13+

2. Get the Chargie app
from Google Play or Apple's App Store.

3. Use the app to connect to Chargie via Bluetooth and
set the desired charging level by sliding your finger across the battery icon.

4. Sleep. Work. Travel. Whatever you like.



Active charge limiting

Selective overtemperature protection

Hardware Limiter for Simple Batteries

Charge Scheduler

Power limiter for USB-C power supplies

Data passthrough mode for Android Auto

an actual use case

Chargie works for real people

Robert (Killburn, Australia):

Robert holding a chargie

We have kiosk booking devices, which are basically mobile phones,  that we deploy to customers. These phones are on 24/7. Some phones would fail after a number of months with battery issues, due to being constantly on charge.

We now use Chargies on all devices to better manage the charging cycle. This has substantially extended the life of our booking devices.

Fun fact: some people keep stealing Robert’s Chargies (they’re displayed in public places), so he keeps ordering new ones. We feel flattered people take the risk of stealing Chargie devices, but it’s so sad it happens. To anyone involved, please don’t do it any longer, theft is a bad thing.


Scheduled charging control loop

Chargie's "Top Up Scheduler" has the unique ability to keep your phone at a safe state of charge during the night (50 to 70% is best) and only top it up to a value of your choice in the morning, just before you wake up.

This allows you to both protect your battery well by avoiding prolonged high states of charge and still use the phone at its full battery capacity.

This feature helps protect your battery by avoiding prolonged high states of charge, while still allowing you to use the phone at full battery capacity.

heat kills batteries

Overtemperature protection

Sometimes, it's better to just stop charging in high temperature situations, like when using your phone as a navigation device on your car dash in hot summer days.

In such cases, heat degrades the battery's internal structure more than anything and if exposed to heat for a long time, the battery eventually swells and can ruin your phone or explode.

All phones have some sort of overtemperature protection,
but the factory threshold is often set too high to properly protect a battery from premature aging. (50°C / 122°F)

Chargie allows you to set a much lower charging temperature threshold, so that you can protect your battery during long drives or hot summer nights. Automatically.

use chargies everywhere

Innovative charger detection

Chargie's closed loop system takes control of the power flow following an algorithm that decreases battery temperature and voltage related stress, throughout the 8 hours of nighttime or prolonged daytime charging while you work.


The app runs in the background and will automatically detect which Chargie you have plugged in to.

You will seamlessly switch between Chargies: at home, in your car, at the office,
without even thinking about it.

multiplatform battery care

Works with Apple and Android devices

Chargie has apps for iOS 13+ and Android 6+. Our test phones are branded Samsung, Xiaomi, Huawei, Google, OnePlus, iPhone 12, iPhone 13 Pro and iPad 8.

Actually, Chargie will even work with your Watch or any other device that has a battery by using its built-in Hardware Limiter. You just need to first configure it in the Chargie app on your phone or tablet.

why chargie works

The science behind active charge limiting

image (c) Apple

A typical smartphone charges up to 100% and then keeps the battery in that very high state (around 4.35 volts) until the user disconnects from the mains.

The battery is indeed protected from thermal runaway by its internal circuitry (it would catch fire otherwise), but the measures taken happen at extreme values, and are not optimized for a long and sustainable battery life.


Holding a 100% charge for many hours at a time induces a voltage- and heat-related stress and damages the internal lithium lattice of the battery, at a molecular level (see reference).

Limiting the charge level below 100% or releasing it once it has 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 (tables courtesy of [1]).

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 [1][2], Sony in latest-generation Xperia and Lenovo in laptops. Apple has recently implemented a similar but way less configurable function in iOS 13.

However, most phone manufacturers haven’t and probably never will.

Lithium-ion suffers from stress when exposed to heat, so does keeping a cell at a high charge voltage. A battery dwelling above 30°C (86°F) is considered elevated temperature and for most Li-ion a voltage above 4.10V/cell is deemed as high voltage. Exposing the battery to high temperature and dwelling in a full state-of-charge for an extended time can be more stressful than cycling. Table 3 demonstrates capacity loss as a function of temperature and SoC. (
The damage each cycle does to a battery depends on the depth of discharge, time of charge and temperature. Lithium Ion units are very sensitive to depth of discharge and temperature.  The lower you go, the worse it gets for the battery, because the internal resistance of the cell rises and energy is lost through heat (just like a classic lightbulb).  Some papers refer to cycles as a continuous charging process from zero to 100%, while others add mini-cycles (like from 30% to 50%) to this equation, but they’re not equal in terms of battery degradation, since five 40-60% cycles don’t do the same harm as one 0-100% cycle and then keeping it fully charged.[1]
Besides limiting the charging process, Chargie’s hysteretic algorithm (see what hysterestic charging is) makes sure that even if you charge to 100%, the process is stopped until the battery discharges down to 95%, and then restarted. 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 can keep the charge between 20% and 90%. If you do so, Chargie will apply the hysteresis you set, and the practice will yield much better results in the long run, from both a battery lifespan and daily usability perspective.

Ideally, the lower the daily charge, the better it is for the battery. However, you should take care not to overdischarge the battery either. For example, if you regularly go down to 1%, it’s better if you set the top up level to 100% for the morning. Chargie will keep the base level at 60% and will only stay at 100% for a brief period of time.

By applying hysteretic charging, the risk of battery swelling and fires is greatly reduced (unless the battery itself has a physical defect). Google this.


for harsher environments

Chargie contains Gold (Au)

holding a gold bar

Chargie has a tiny amount of gold deposited onto every inch of board and its connectors.


This is great because the production process is lead-free, gold doesn’t oxidize and it is one of the best treatments for copper.

laying down chargie

It costs us more to produce them, but the overall benefits are worth it. Your Chargies will last much longer in harsher and wetter environments without losing their conducting properties.

new hardware, better charging

Your feedback was heard

Our newly redesigned app, hardware and firmware
are fully packed with new functionality such as:

The Chargie app normally runs on your smartphone, but now you can limit the charging of any kind of lithium ion battery, or of a phone that’s been shut off. It will cut power at about 90%, based on power measurements done automatically and continually by Chargie’s hardware. 

The new Chargie A GE and Chargie C Basic now have a working mode that does not cut power completely to the phone while it’s not charging, so that it can be used with Android Auto and USB tethering.

If your load consumes more power than it should, Chargie automatically cuts it off and restores it as soon as it’s rebooted or within the next scheduled charging cycle. That simple.

Chargie A GE is 25% shorter and 10% thinner than Chargie Founder Edition, which makes it more portable and insertable. Chargie C is even smaller – check out the hardware features page.

The LED lights in the new Chargie A GE are as important as before, and they indicate the same thing. However, they are now configurable, so when you turn off your phone’s screen the two LEDs turn off automatically, to reduce nighttime light pollution.

no shell chargie showing gold pcb

invest in your phone

Chargie will be free after a month of usage!

To figure out how long it takes to recover the investment in Chargie, we can divide the investment by the cost of replacing a $1,500 phone at  a 10% average yearly degradation rate. 

We’ll assume you’ll switch your phone at 50%-60% battery capacity.
You’ll do it sooner than that, due to the associated pain:

  • $29.99 / $428.57 per year ≈ 0.07 years (less than a month).
    If your phone cost you $500, it’ll probably take three months to recover your investment. But still totally worth it.

Chargie helps you Reuse and Recycle

cute baby asleep

Since 2015, phone manufacturers glue batteries inside their phones. Apple recently restricted aftermarket battery replacements.

This makes your phone very difficult to repair. The electronics industry is one of the greatest sources of pollution that are affecting the health of everyone, including yours and your children.

After you upgrade, donate your old phone to someone in need who is not as picky with tech as you are. 

That person may be using it for many years ahead, and will not need to buy a new one! 

always on devices

Practical Use Cases

Chargie has been designed to protect batteries. Just juice your phone through it and in a few months you will see the difference:

– Your battery life will be like when it was new
– We are working on implementing a Chargie Certification Program, so you can have a higher resale value, should you decide to sell it.
– After you upgrade to a new phone, you can safely give a perfectly working gift to someone in need.
– You can use the same Chargie on your next phone, too.

chargie takes care of your phone charging process
a-girl-sleeping-while-holding-the-tablet []

There have been cases where people who were sleeping with phones under the pillow died, because the battery caught fire. Here’s a Google Search link to news about the topic. Happens all the time.

According to the National Sleep Foundation, studies found that around 45 percent of parents and 30 percent of children sleep with their cellphone or tablet in their bedroom with them, oftentimes leaving the devices turned on and plugged in throughout the night (link here).

With Chargie’s scheduler, those devices can stay charged at 50% overnight and the risks of fire will most likely be close to zero.

Demo phones and tablets in shops usually stay connected to the mains, and that’s what destroys their batteries. After a few months they start swelling or even catch fire, in severe cases.

Chargie automatically ensures the battery is only charged partially, hence the damage will be almost zero and the risk of fire is null. This also increases the resale value of those demo phones.

they are using chargie in phone stand store
Phones and tablets are used as surveillance equipment in many cases (like that project that protects forests from illegal tree cutters). They often run on solar power, but their batteries stay charged to 100% all the time. Hence the risk of swelling, fire and general malfunctioning of the system. With Chargie, those devices stay charged at 50% and the risk of fire will be zero.

Professional drivers (taxi, Uber, trucks, pizza deliveries) use tablets and phones as navigation systems all the time. They stay charged up for thousands of hours every month, placed in direct sunlight.

Batteries get very hot, very often.
Fully charged lithium ion batteries and high temperatures are a very dangerous combination.

Chargie can do away with all that by limiting the charge to some 50%. This way, battery damage is greatly reduced and the risk of catching fire is eliminated.
Fleet management is on its way to the app soon.


Chargie’s hardware limiter provides a simple yet effective solution for protecting regular batteries that don’t have smart capabilities. By measuring instant power and detecting when it falls below a certain threshold, Chargie’s limiter can cut off power to the battery without the need for an app or any additional programming. This hardware-based approach ensures that batteries remain protected against overcharging, which can damage the battery over time and potentially even cause a fire. With Chargie’s hardware limiter, users can enjoy the peace of mind that comes with knowing that their batteries are always being charged in a safe and responsible manner.

we deliver since 2019

Other customer reviews

big guys like chargie

Notable customers

All of our customers are notable people, who chose to invest in an original technology and its early stage development.

However, you may have heard about some of them.

famous customers logo

Note. We are not affiliated with any of these companies. All of the logos presented herein are trademarks of their respective owners.

"Why doesn't my phone have this already?"

So far, manufacturers only implemented rudimentary, half-baked solutions that work “automatically”, or have very fixed settings.

And most of them will still charge your phone to 100% every morning. Just like in 1999. It’s a “better than nothing” approach due to planned obsolescence policies. They have to sell new phones at least every two years.

None of the manufacturers provide the insane level of control and efficiency over the charging process that Chargie does. 

wireless charging

That's why Chargie will always be your battery's best friend, for every phone you'll ever own.

A healthy battery not only saves you a lot of money, because it postpones the moment you have to spend it on a new phone, but also a lot of frustration until you buy that new phone. And it saves tons of carbon by prolonging battery and ultimately phone life.

battery graphic illustration

Chargie is trusted by more than 40,000 users worldwide, since 2019.

Worldwide delivery

Pay securely

*EU Customers: VAT is variable and not included in the shown price. It will be added in the Checkout page.

*Colors shown are only orientative. 
Their choice is not guaranteed, as we are using pre-packaged products that get delivered from two warehouses.

Notice: you are ordering a hardware and software solution.
Although it may look like this is just about the hardware device,
thousands of hours of development and testing
are being invested in the app.

Your purchase directly supports innovation, tooling and the evolution of this project.
Our overall profit is relatively small.

Want to help us spread the word and earn a commission?

Companies spend a lot on advertising. Most of it goes to Google, Facebook and other big companies,
but even regular fans can also help with marketing by simply talking about their Chargie to their audience. 

Write/talk about Chargie on your blog/YouTube video or
post your affiliate link on a web page and we’ll pay you 10% when your earnings exceed $100.

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