Touching the battery with bare hands is not advisable, as a thin film of grease could form on the battery due to contact with the skin. This can result in increased resistance on the battery, which affects the flow of current. Consequently, the performance of the button cell is significantly reduced. Therefore, it is recommended to wear rubber gloves when unpacking and inserting the battery. This ensures the proper functioning of the battery. Additionally, you should pay attention to the battery's expiration date and avoid using expired batteries in your device. Please take the used button cell to designated recycling stations for disposal.