It's fun to see the numbers swap and change in varying light conditions, and the app serves its purpose of allaying any concerns of battery life. On a desk in a moderately-lit room, the keyboard measured light intensity at 86 Lux, but lifting the keyboard 2ft closer to the ceiling promptly raised that reading to 98 Lux.
The optional Windows-only app indicates exactly how much light is being received by the solar panels, and illustrates how sensitive the panels actually are. A green light tells you you're good, and a red light indicates that light intensity is being measured at under 50 Lux.Įxpanding on the readings for those who're curious, Logitech also bundles a Solar App that provides a more granular look at the condition of the ML2032 battery.
What's useful is that the keyboard has a hardware on/off switch to help preserve the battery during extended periods with no use, and a "Check Light" key is on hand to indicate whether or not the lighting conditions are sufficient to recharge the battery. With the keyboard kept in a moderately-lit room in the day and darkness in the night, we've yet to see the battery life indicator drop below 100 per cent.
#LOGITECH WIRELESS SOLAR KEYBOARD K750 NOT CHARGING FULL#
Logitech claims that a full battery "stays charged for at least three months in total darkness", and our time with the keyboard suggests that those claims probably aren't far from the mark. It's important to note, however, that the K750 isn't powered directly by the sun - it instead uses light (either natural or artificial) to keep an integrated Manganese Lithium button-cell battery topped up at all times.
The K750's claim to fame is that it features integrated solar panels that eliminate the hassles associated with replacing or recharging traditional AA batteries.
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