How long does the Logitech MX Keys Mini battery last?

The recorded figure is up to 5 months with backlighting off. That condition is part of the value, not a footnote, because the record does not give a separate number for use with the backlighting on.

What the record settles

The MX Keys Mini's recorded specifications are a compact layout with a function row, Bluetooth and Logi Bolt connectivity, a battery life of up to 5 months with backlighting off, and USB-C charging. Its recorded features are multi-device switching and wireless connectivity.

So the answer a buyer needs is narrow and specific: a stated battery life of up to 5 months, on the condition that the backlighting is off, with charging over USB-C. It is a wireless board, which is the reason the battery figure is a headline number for it in the first place, and multi-device switching means the same charge serves more than one machine.

What it does not settle

No figure is recorded for the backlighting being on, and no figure is recorded for a different usage pattern, so the number to plan a week around depends on the backlight setting you actually use. There is no record of how long the board runs on a partial charge, no information about how the battery behaves over time, and no record of whether a replacement battery is possible.

Nothing in the record describes charging time either. The entry for charging states the connection, USB-C, without a duration.

Verification state

The battery figure is recorded as read from the manufacturer's own domain and has not been checked against a specific product page. It is a stated maximum under a stated condition rather than a measured result, and it should be read as the documented specification.

For context within the catalogue, the Logitech MX Master 3S and the Logitech MX Anywhere 3S both record a battery life of up to 70 days on a full charge, while the two Keychron boards in our catalogue record no battery figure at all.