Final answer:
The amount of time left when the NFTI indicates low battery can vary depending on how long the device has been turned on and its power consumption.
Step-by-step explanation:
When the NFTI indicates low battery, the amount of time typically left can vary. It depends on how long the device has been turned on and how much power it has been consuming. If the device has been on for a short amount of time, there may be more battery life remaining compared to if it has been on for a longer period.
For example, if the NFTI has been on for only 10 seconds, there may still be a significant amount of battery life left. However, if the NFTI has been on for a day, there may be very little battery life remaining.