Cameron Sino Li-Polymer 3.70V 380mAh / 1.41Wh Battery Compatible with Nest TL284443, Fits Nest Learning Thermo2nd Generation,Learning Thermostat 3rd Generation,T3007ES,T3008USstat,A0013

Fixed the issue in the first time Save money to buy the new NEST thermostat. Will buy again. I do not know how long for the warranty, but happy to fix the power on the unit.

That is what the seller should have said when I purchased the battery. It was not able to be charged from the thermostat base nor the USB port on the rear of the thermostat body. I will attempt to return the battery.

I tried another battery on Amazon and the cable length was too long, and the power was too low. Got this one instead and it works like new! Have the Nest 3rd Gen, and this is the replacement battery you need!

The battery works as advertised. After roughly 3 years the battery went dead in my nest thermostat Gen 3. It simply reached end of life and is unable to charge any longer. First the wifi began cutting out and ultimately the thermostat went dead altogether. What baffles me is that there is NO talk of the nature of the nest thermostat being a disposable product after the life of the battery. The nest thermostat is NOT designed to be serviceable. Although there is a battery provider out there and a youtube video on replacing the battery. That all being said watch the video REPEATEDLY before replacing the battery. The 8 points that i learned is that 1. the unit is certainly not for the faint of heart in disassembling. 2. take multiple pictures of the unit as you disassemble 3. the routing of the ribbon cable is everything. 4. the plastic battery coupler on the PCB is design to LIFT UP, not pull laterally. 5. The original battery is glued in place with doubled sided tape and a second line of adhesive. 6. The PCB actually "captures the first ridge of the outer slide ring. I believe this is the indexing counter. 7. Do this on a CLEAN surface as the outer metallic slide ring is lubricated with silicon grease and rapidly attracts dust and dirt. 8. The instruction video show the use of a small PRYING TOOL. Do yourself a favor and get one of these for both the removal of the glued battery, and the disconnection of the battery wire from the plastic coupler on the PCB. Not that this makes any difference, but i am a degreed engineer and very comfortable digging around inside of technical assemblies. I still found this to be a challenge as I had wrongly assumed that it would be a couple screws and 5 minutes. However, it was definitely worth the $14 for the battery, rather then dropping $250 on a new nest thermostat. What I am completely dismayed at is that Nest doesn't tell the world that there is a finite life to the battery and that Nest does NOT support the replacement thereof. That is simply poor design planning at best and potentially consumer fraud at worst. Nest should NOT be selling a $250 device that has to be tossed in the garbage in 3 years just because the battery isn't designed to be replaced! Finally, Kudos the the battery provider to giving the rest of us a way to fix something so simple as a dead battery and the video instruction on how to do so. BTW - the YouTube video shows the gentleman using a small "prying" tool and a pair of project tweezers... I would highly advise getting both these tools out BEFORE you start pulling the thermostat apart. You will be thankful.

I didn’t get a chance to use this battery cause the tiny connectors on the nest broke while I was installing this battery.

Gen 3 thermostat. I got a little nervous after seeing some other reviews about the difficulty of install, but it really wasn't all that hard in my case. As long as you have precision screwdrivers and a flat plastic pry tool, you should be good to go. 4 outer screws, 4 inner screws, and the connector pulls up. The challenging part is prying the old battery up carefully so you don't puncture it. Again, plastic pry tools, not metal. ;)

First, this battery is of lower capacity than the original Nest battery. About 30% lower. Which would normally mean that at full charge, it should last about 30% less. But it doesn't even last one day. It is just a very low quality battery. It fits and it's not all that difficult to install, but it doesn't work. I'll hold on to the Nest until a real replacement battery becomes available, until then I had to buy a new thermostat. Obviously not another Nest with non-replaceable battery.

Initially the battery worked well, for a day. Now it won’t hold a charge and Nest keeps going offline.