Which type of battery is not allowed in cabin baggage?

The option indicating that non-removable lithium batteries are not allowed in cabin baggage is correct because these types of batteries pose a higher risk of overheating and catching fire due to their design. Non-removable batteries are typically found in devices like laptops and smartphones, and if they malfunction or experience a short circuit, they can lead to serious safety hazards on board. This is why regulations often restrict these batteries from being placed in cabin baggage, as they are more challenging to manage in the event of an emergency.

On the other hand, removable lithium batteries and lithium button cells may be permitted in cabin baggage, typically given they fall within specific size and power limits established by aviation safety regulations.