Fit Model Nest Learning Thermostat 2nd Generation Learning Thermostat 3rd Generation T3007ES T3008US Learning Thermostat 3rd Gen A0013 Thermostat E T4000ES Part Number Nest TL284443 GB-S10-284449-0100 Capacity 380mAh Type Li-Polymer Voltage 3.7V Rate 1.41Wh Fully compatible with your device . Same as the original battery. The replacement battery is Certificated with ISO9001,RoHS, and CE. Fit Model NEST A0013 Learning Thermostat 2nd Generation Learning Thermostat 3rd Gen Learning Thermostat 3rd Generation T3007ES T3008US Part Number NEST TL284443 **Tips Before Purchase**  Please confirm the compatible model and battery part number carefully before you purchase it.  If you are not sure, please send email to us with your battery details or pictures, we will give you professional suggestions.