solar powered keyboard logitech k750 battery

With both types of batteries, as they ran down, but especially true for the ML, having the light pointed at the solar panels helped keep the keyboard functional. I put a voltmeter across the batteries, and most were still close to 3V, so I thought they’d work OK. The CR2032 is less ecological, because it doesn’t recharge, but when the disposable battery lasts just as long as the rechargeable, what’s the difference? Current is More Important Recharging involved putting 5V across the battery, and cycling between charging for 10 – 20 minutes, and then letting the battery rest an hour or so. Well, surprise surprise, it worked, and it worked for around one year.įurthermore, I found that, in a pinch, I could recharge a discharged CR2032, and use it a little bit longer. I also tried the CR2032, the same-sized button-cell battery, with the same voltage, but made of lithium, and not meant to be recharged. I tried some AA batteries in series, and it seemed to work, but it was bulky. My solar panels seemed to be failing to keep the replacement batteries going for much longer than a year, so I decided to experiment with other power sources.

It could be replaced with a ML2032, which could be purchased online for $5 to $9 each. In practice, the battery would die after a few years. Theoretically, the battery would last the life of the keyboard. The Solar Keyboard’s claim to fame was the two small solar panels on the keyboard that recharged the battery as you used it.

Solar powered keyboard logitech k750 battery