How long it takes for a cell phone to consume 1% of its battery power is a relative matter, as battery capacity and usage will vary from cell phone to cell phone. Generally speaking, for an average smartphone, it is relatively normal to consume 1% of the battery for about 1-2 hours.

The length of this drain time is affected by a number of factors, such as how often the phone is used, the brightness of the screen, the network connection, and how the apps are running. If the phone is in normal use, such as browsing the web, using social media, sending and receiving messages, etc., if it consumes 1% of the power within 1-2 hours, it is within the normal range.

However, if the phone is draining significantly faster than 1% in 1-2 hours under the same usage, it may be time to consider the health of the battery or the presence of apps that are draining it too quickly. At this point, you can try measures such as optimizing your phone's settings, turning off unnecessary background apps, and reducing screen brightness, or consider replacing the battery.

In short, how long it takes for a phone to consume 1% of its power is normal, and it's important to take into account the usage of the phone and individual differences to make a reasonable judgment.