Nono - Batteries Externes is an iPhone application developed by G2R Conseils. It falls under the category of Utilities & Tools and offers a unique service for users to recharge their phones using external batteries.

The app provides a simple and convenient way to access this service. Users can register on the Nono app and scan a QR code at a designated station to unlock a Nono battery. The battery can then be used to charge their phone for free for up to 48 hours. Once the battery is no longer needed, it can be returned to any partner location within the network.

One of the standout features of Nono - Batteries Externes is that the service is completely free of charge. However, a refundable deposit of €25 in the form of a bank authorization is required to ensure the safe usage of the battery. No charges will be made if the battery is returned before the end of the 48-hour period.