The Smartest Battery Protection System for Phones and Laptops
Chargie is a small USB device that goes between your charger and charging cable. Set a limit in the free app: Chargie cuts power at that level and restarts when needed.
Chargie sits between your charger and cable and physically switches charging off at your chosen limit. The three models suit different connectors and power needs. Click an image to explore it in 3D.
Chargie A Gold Edition
For USB-A chargers. A gold-plated charge limiter that lets you set your phone’s charge limit through the Chargie app.
Keeping your phone or laptop fully charged overnight or through a long workday can speed up battery wear. Capacity fades little by little, even while the screen still says 100%.
Newer battery100% charged
Energy it can hold
More energy at full
Worn battery100% charged
Lost capacity
Energy it can hold
Less energy at full
Both are full. The worn battery holds less.Illustration of capacity—not battery size or a measured result.
About 20% capacity lost in one year
That’s the estimate for a lithium-ion battery stored at 100% charge and 25°C (77°F). Actual loss varies with the battery, temperature and time spent full. Source: Battery University, Table 3.
Heat makes it worse
Charging, heavy work or a hot room can warm the battery and speed up the wear.
Not overcharging—gradual capacity loss. The screen can still say 100%, but each full charge holds less than before.
A USB-C laptop charge limiter supporting Power Delivery up to 100W. Choose Full or Half Power, view live power readings, and set weekly schedules on compatible Mac and Windows laptops.
Yes: you leave with less charge each time. Choose a limit that covers your day, and raise it when you need more. Chargie cannot restore capacity already lost.
04Meet the three models
Choose your charging limiter.
Start with your charger’s port and your device’s power needs. Here’s what makes each Chargie different.
USB-A
Chargie A Gold Edition
For the USB-A charger you already use.
Connection
USB-A in and out — the rectangular USB port.
Charging power
Up to 10W (5V / 2A) for everyday phone charging.
Devices
iPhone, Android phones and tablets using a USB-A charging cable.
Before buying
Use your own USB-A charger and charging cable; neither is included.
Every model: a physical charge cutoff and a free companion app. Percentage-based control needs the supported app and Bluetooth connection. Actual charging power depends on your setup.
Personal routines, always-connected kiosks and a collaboration with Nokia Labs. See how Chargie fits into the real world.
Notable customers
Customer references, not endorsements. No affiliation is implied; trademarks belong to their owners.
Corporate collaboration · documented in 2023
Nokia Labs. Charge control for 5G test phones.
Phones used in network testing spend long periods plugged in. Our Nokia Labs story describes an app collaboration to manage charging while keeping the USB data connection available for testing.
