This mouse has a 600 mAh battery. On the product page for this mouse, keychron advertises a battery life of up to 70 hours with the 1kHz polling rate variant, which is the variant we bought and tested. This estimate doesn’t specify, but we expect this to be the battery life using the 1000Hz polling rate and connected wirelessly via its USB receiver. There’s a small LED indicator located below the scroll wheel that blinks red when the battery life is low.
While we didn’t test the 4kHz polling rate variant of this mouse, the product page suggests it has the same battery size. At the time of writing, It also advertises that the 4kHz polling variant has a battery life of “up to “135 hours in 1000Hz polling rate mode.” and that “Usage duration is 40 hours in 4000Hz Polling Rate mode.”
While the battery duration of 40 hours using a 4000Hz polling rate seems feasible, there may be a mistake on Keychron’s product page regarding the battery life of the 4kHz polling rate variant using the 1000Hz polling rate setting since 135 hours is much more likely to be the battery life estimate when connected via Bluetooth, which uses a lower polling rate of 125Hz. In actuality, we expect that the 4kHz variant will have the same ~70-hour battery life as the 1kHz variant when using a 1000Hz polling rate. If you have the 4kHz variant of this mouse and would like to share your experience of the battery life, we encourage you to reach out to us in the Discussion section below.
