According to the user manual, the battery life is sufficient for approximately 60 measurements, depending on the blood pressure level or inflation pressure, as well as the number of Bluetooth connections. The battery should be fully charged at least every 3 months. Unfortunately, the data sheet does not provide specific information on how long it takes to fully recharge the battery. This question remains open in the community forum. We hope that other community members will be able to answer your question regarding the battery charging time.