For any radio system, receiving continuously also kills battery, just not as fast as transmitting does. Low-power requires you to turn the receiver off for ext

For any radio system, receiving continuously also kills battery, just not as fast as transmitting does. Low-power requires you to turn the receiver off for extended periods of time, but what you can do there is limited by how interactive the device needs to be, and how much the power the transmitter is willing to waste on retries/longer preambles. For proper low-power (e.g., devices with ≥ 1 year battery life on small batteries), you're likely to need sleep periods of minutes to hours, or only waking up on physical interaction.