When a Nest Learning Thermostat needs a power refresh, selecting a reliable TL284443 battery can extend life and keep temperatures steady. This guide highlights five strong options, focusing on capacity, safety features, and compatibility with Nest 2nd and 3rd generation models. Each pick includes full kits or essential tools to simplify replacement, helping you avoid outages and maintain thermostat performance.
| Product | Brand | Key Feature | Compatibility |
|---|---|---|---|
| RRUHHK TL284443 Battery | RRUHHK | 780mAh high capacity; smart IC with overcharge protection | Nest Learning Thermostat 2nd/3rd Gen, T3008US, T4000ES, T3007ES, A0013 |
| OHZHAO 980mAh TL284443 Battery | OHZHAO | 980mAh high capacity; Li-ion replacement with repair tools | Nest Learning Thermostat 2nd/3rd Gen, T3007ES, T3008US, T4000ES, A0013 |
| WRUMI TL284443 Battery Replacement | WRUMI | 650mAh high capacity; TL284443 compatibility for gen 3 | Nest Learning Thermostat 3rd Gen (T4000ES) |
| TAYUZH TL284443 Battery | TAYUZH | 1000mAh capacity; 0-cycle replacement with tools | Nest 2nd/3rd Gen (T3007ES, T3008US, T4000ES, A0013) |
| OHZHAO 980mAh TL284443 Battery (2-pack) | OHZHAO | 980mAh per cell; includes two batteries and tools | Nest 2nd/3rd Gen (T3007ES, T3008US, T4000ES, A0013) |
RRUHHK TL284443 Battery – High Capacity Nest Replacement

The RRUHHK TL284443 battery is designed for Nest Learning Thermostat 2nd and 3rd generations, including T3008US, T4000ES, T3007ES, and A0013. It features a 780mAh high capacity and a built-in smart IC for multiple protections, including overcharge and short-circuit safeguards. The kit is described as new with a repair toolkit and aims to extend device life through reliable power delivery.
OHZHAO 980mAh TL284443 Battery

OHZHAO offers a 980mAh TL284443 replacement suitable for Nest 2nd/3rd generation models. The product emphasizes full compatibility and high capacity, aiming for longer life per charge. It is marketed with repair tools to aid the replacement process and claims enhanced durability compared to standard lithium cells.
LiCB CR2032 3V Lithium Battery Set

While not a TL284443, CR2032 coin cells from LiCB are frequently used in thermostat accessories and related components. This 10-pack includes CR2032 cells with full 3V charge and three-year shelf life. They are CE/ROHS certified and suitable for small backup circuitry or settings within compatible devices.
WRUMI TL284443 Battery Replacement

WRUMI’s option for Nest Thermostat 3rd generation emphasizes a 650mAh capacity with TL284443 compatibility. The kit includes a tool and specifies Li-Polymer chemistry for efficient charging and compact form. It is positioned as a practical replacement for users seeking a dependable upgrade with supportive hardware.
TAYUZH TL284443 Battery with Tools Kit

TAYUZH provides a TL284443 1000mAh battery designed for Nest 2nd/3rd Gen thermostats, including models T3007ES, T3008US, T4000ES, and A0013. This replacement is marketed as a premium, high-capacity option with an included repair tools kit and installation guidance, suitable for first-time swap-outs.
OHZHAO 980mAh TL284443 Battery (2-Pack)

The two-pack option from OHZHAO provides two 980mAh TL284443 batteries for Nest 2nd/3rd Gen thermostats. It stresses full compatibility across T3007ES, T3008US, T4000ES, and A0013, with emphasis on durable materials and long life per charge. This bundle suits users who want extra spares for ongoing reliability.
Buying Guide: Choosing the Right Thermostat Battery
- Compatibility: Verify model support for Nest 2nd or 3rd generation and the exact part number (TL284443) to ensure proper fit and voltage compatibility.
- Capacity and longevity: Higher mAh generally means longer run time between charges but may affect physical size. Consider 650–1000mAh options for Nest thermostats with adequate clearance.
- Safety features: Look for smart protection circuitry against overcharge, overheating, and short circuits to extend battery life and protect the thermostat’s electronics.
- Included tools: Kits that provide installation tools can simplify the swap and reduce the risk of damage during replacement.
- Durability and warranty: Choose brands that offer clear product warranties and robust build quality to minimize resupply needs.
- Availability of spares: If you manage multiple thermostats, a multi-pack or multi-battery option can be cost-effective and convenient.
- Avoiding counterfeit components: Stick to reputable brands and verify product images and compatibility notes to avoid mismatched or unsafe replacements.
These considerations can help homeowners select a reliable, safe, and durable power solution for Nest thermostats. When choosing, prioritize compatibility, battery capacity, and the availability of useful replacement tools to ensure a smooth upgrade process and stable thermostat performance.