Maxell ML2032 Rechargable 3V coin cell lithium motherboard cmos battery

My outdoor weather station sensor stopped working so I took out the battery to replace it and I discovered that it is a rechargeable battery and the unit is clearly marked to not use a regular battery to replace the original battery. I couldn’t find a rechargeable battery like this locally so I checked online and Amazon had them available so I ordered one and it arrived two days later. I installed the battery and put the sensor back up and it has worked perfectly with the new battery. I noticed that the battery I removed was the same brand and part number so I was sure it was the correct battery for my sensor unit.

The Logitech k750 has been my favorite keyboard for over a decade, unfortunately it seems they may have finally discontinued it. The keyboard itself is pretty durable, but the battery can die. It seems that over time the Logitech changed their mind about whether this was a user replaceable part, but there are later instructions on their website on how to replace the battery, instead of warnings not to replace it.The the rechargeable battery dies, it can present in a number of different failure modes. This time, the when I removed the keyboard from the USB Unifying dongle via the utility, it would not pair again.It takes a little prying with a small screwdriver to get the battery try out. Once out, I popped in the new battery, let it charge until the LED turned green, and then was able to pair the keyboard with the USB Unifying dongle again.Chances are if you have a malfunctioning k750 keyboard, all it needs is one of these batteries.

Exactly what I needed and the instrument started working immediately.

I had this battery in an outdoor weather system. The battery lasted less time than I experienced with other brands. It was protected from the weather but still exposed to outdoor humidity. The worse thing is this battery was beginning to corrode. This could have been a real problem as corroding could damage an expensive piece of equipment. I did buy another of the same brand and will see what happens. The price of the battery is a major plus.

At first I was unsure if the battery was working. I was a little unclear on what the little red/green test light on the keyboard was telling me. It appears that light only tells you if the solar powers are drawing enough light for charging or not enough light and therefore discharging. It really has nothing to do with the battery itself.For Windows, Logitech offers software that will show you the battery charge level. Linux was not quite so obvious, however the command to find this info in a terminal is "upower --dump". I left the keyboard out in scattered sunlight for several hours and ran that command. Here's the result:Device: /org/freedesktop/UPower/devices/keyboard_hidpp_battery_0native-path: hidpp_battery_0model: Wireless Solar Keyboard K750serial: 4002-1c-5e-43-63power supply: noupdated: Thu 02 Apr 2020 03:16:36 AM PDT (108 seconds ago)has history: yeshas statistics: yeskeyboardpresent: yesrechargeable: yesstate: fully-chargedwarning-level: nonepercentage: 100%icon-name: 'battery-full-charged-symbolic'So it appears the battery is working perfectly. I was worried after reading several reviews that said the batteries were not working and not charging. I wonder if perhaps some of these people were trying to use the keyboards solar test button I mentioned as an indication of the battery charge level. That button will show red in the dark even if the battery is at 100% charge.Now let me just say it's a shame the Logitech would participate in planned obsolescence by putting a sticker on the original battery telling you that the battery is not replaceable. DO NOT REPLACE it says. Sure, they make more money selling you a new keyboard in 3 years than selling you a battery. Not only do you lose out on your $60 keyboard, they're also creating more electronic waste for no viable reason other than pure greed.

DOA, it didn't work. Checked it with my Amprobe battery tester and it just barely registered as good; then as I watched it the meter began rapidly dropping into the red dead zone. If their Quality Control is that bad, just don't buy from this supplier!

If you have an older K750 keyboard that is no longer holding a charge this is the rechargeable battery for you. It is identical to the OEM ML2032 and works as a drop-in replacement. Performance is what you'd expect from a battery; it holds a charge well and meets my needs for the keyboard. Logitech claims the keyboard can hold a charge for up to 3 months in total darkness, though I have not verified this myself. They also say that the battery continues to charge when the keyboard is switched off.When installing, be sure to put the battery in the tray the right way - the bottom negative side should be facing up in the tray and the positive side down. As far as I know, the reason it comes in a plastic bag and not any manufacturer packaging is that these batteries are not sold directly to consumers at retail and only to manufacturers. That also explains why these are a bit challenging to find. There are a number of "hacks" out there to run a regular (non-rechargeable) CR2032 battery in the K750, either by blocking the solar panels off or disconnecting them completely. For me, I'd rather not have tape all over my nice-looking keyboard and instead spend a little more to get the proper battery.