Akku lose capacity over time. Operating systems such as Windows and macOS already offer several features that are intended to extend battery longevity. Chargie should make it even easier to protect laptop batteries. It's a small gadget that is inserted between a USB-C charging port and the charging cable of a laptop. Adapters are available for laptops from Dell, HP and Lenovo, which connect via a classic hollow plug instead of USB-C.

Chargie supports chargers with an output of up to 100 watts. After Chargie has been plugged in, the gadget must be connected to the laptop via Bluetooth so that it can be set up using the associated software. The app is available for Windows, macOS and Chrome OS and offers, among other things, the option to limit the maximum battery charge, for example to 80 percent. This extends the service life, since Akku are especially stressed when they are fully charged or emptied.