Final answer:
The claim that Bluetooth drains battery life is true; Bluetooth usage requires energy which can reduce battery life. Recharging a battery also leads to energy loss as heat due to internal resistance.
Step-by-step explanation:
The statement that Bluetooth will drain battery life is true. When Bluetooth is active on a device, it uses energy to communicate with other Bluetooth-enabled devices, and this energy use can lead to a reduction in battery life over time. Additionally, when a device's battery is being recharged, some of the energy being used to recharge the battery may be lost as heat due to the internal resistance of the battery, which is another factor that can affect battery lifespan and efficiency.