Open the compartment and insert the rechargeable battery, first push against the contacts, and then push and insert the rear. Connect a part of the charging cable into the connector (12), 5V DC input and the other part to a 5V USB power supply (not supplied). The charge from any mobile will work.
The radio will charge in 3 hours, do not have it charging more than 24 hours in a row to prevent the battery from deteriorating. The battery life is 31 hours approximately at medium volume. Higher volumes reduce battery life.
Use with batteries
Open the battery compartment and insert 3 AA size LR6 alkaline batteries (not included). Make sure you put them in the correct position.
Higher volumes reduce battery life. If you use headphones, (not included), the battery life is the best possible.