Using this Telstra and Sanyo phone battery is easy. Simply insert it into your compatible phone following the phone's user manual. Make sure the battery is properly aligned and the connection is secure. When it comes to charging, use a suitable charger for nickel cadmium batteries. Avoid overcharging the battery as it can reduce its lifespan. For maintenance, keep the battery clean and dry. Store it in a cool and dry place when not in use. If you notice any issues with the battery, such as reduced performance or swelling, stop using it immediately and contact us for assistance.