Does a phone with more RAM consume more power when all background apps are cleared?

Mobile Device Power Consumption Overview

Yes, for both smartphones and computers, the larger the specification of memory (RAM) of the same model, the greater the power consumption. However, this varies with the model, as newer models tend to have lower power consumption.

LPDDR5 typically has a transfer rate ranging from 4266MT/s to 6400MT/s with a working voltage of 1.1V. The newer LPDDR5X reaches transfer rates from 6400MT/s to 8533MT/s and operates at a voltage of 1.05V. I’m not sure if the latest model of LPDDR5 24GB consumes less power than the LPDDR4X 16GB version due to lack of specific data. This uncertainty may stem from the minimal difference, making such tests of limited significance. Nevertheless, it’s certain that the newer the memory technology, the lower the power consumption.

Primary Hardware Power Consumption in Smartphones

The daily power consumption of a System on Chip (SoC) ranges from 0.5W to 8W, typically accounting for over 25% of the battery usage during normal operation. Some models, like the notably power-intensive Snapdragon 888 and the Samsung-manufactured Snapdragon 8 Gen1, can increase the SoC’s power consumption proportion. Screen power consumption is approximately between 0.1W and 1.5W, also constituting over 25% of battery usage under normal conditions. Screens made by domestic Chinese manufacturers, often used to cut costs, consume noticeably more power than Samsung’s AMOLED screens. The power consumption of running memory (RAM) is around 1W, accounting for about 6% of battery usage, with newer technologies consuming less power. Given the limited battery usage by running memory, even advancements in technology have a marginal impact on battery life.

Power Consumption in Mobile Applications

According to a report by the renowned international testing agency DXOMARK, the camera ranks first in power consumption. This is because photography demands high RAM and CPU performance, continuously gathering data in memory and using algorithms to select optimal shooting parameters. The process involves the processor, algorithms, and GPS. Larger pixel lenses and larger COMS sizes also increase power consumption. Gaming ranks second due to the requirement for sustained high performance from the chip and the involvement of other hardware like vibration and audio. High power consumption by navigation and GPS is easily understandable as they require satellite signal connections. Video streaming consumes significant power to maintain screen display quality, though automatic brightness adjustment based on ambient light can reduce screen power usage.


With no background processes, smartphones with larger RAM indeed consume more power. However, this difference is subtle and influenced by the type of running memory. Developing correct usage habits is key to reducing battery consumption and enhancing battery life.

Increasing RAM does indeed consume slightly more power.

However, compared to running the CPU at full speed with the screen at maximum brightness and high refresh rate, it’s not in the same league.

The main power consumers in a phone are the CPU and the screen, but you can’t eliminate these two.

No matter how well the software is optimized, when you launch a game like Genshin Impact, it ultimately comes down to battery capacity.