Artisan Power UB-28443-L Battery Upgrade for Nest 2nd & 3rd Generation Thermostat - 630 mAh $21.00 Battery Upgrade for Nest 2nd & 3rd Generation Learning Thermostat. The Artisan Power battery is rated 630 mAh which is about 10% higher than the original Nest batteries translating to greater battery life of the lifetime of the battery... Add to Cart Compare
