MPF Products
MPF Products 200mAh 3.7V Battery TL363844 for Nest Gen 1 T100577
A 3.7V 200mAh lithium-polymer rechargeable battery pack replaces the TL363844 cell in a Nest Learning Thermostat Gen 1 T100577 and includes installation tools
- TypeLearning Thermostats
- Parts1-Year Replacement Warranty.
- Compatible with Nest Gen 1 T100577 thermostat
- 7V 200mAh lithium-polymer rechargeable battery pack
- Replaces TL363844 part number directly
- Includes free installation tools for easy fitting
- 1-year replacement warranty from MPF Products
MPF Products 200mAh Battery for Nest Gen 1
This 3.7V lithium-polymer rechargeable battery pack replaces part number TL363844 in the Nest Learning Thermostat first generation model T100577. It supplies 74Wh capacity and restores power reserve when the original cell no longer holds charge. The unit is a direct replacement for the factory-fitted pack in that specific thermostat.
Installation ease and common issues
Free installation tools are included so the swap can be completed with basic hand tools. The main difficulty is opening the thermostat base without damaging the display ribbon cable. Reversing the connector polarity during reassembly will prevent the unit from powering on. A 1-year replacement warranty covers defective cells.
Pre-order compatibility checks
Confirm the thermostat label reads Nest Learning Thermostat Gen 1 and shows model T100577 before ordering. Verify the existing battery carries part number TL363844 on its label. This pack is not suitable for later Nest generations or other thermostat brands.
Highlights
- Compatible with Nest Gen 1 T100577 thermostat
- 7V 200mAh lithium-polymer rechargeable battery pack
- Replaces TL363844 part number directly
- Includes free installation tools for easy fitting
- 1-year replacement warranty from MPF Products
Specifications
| Brand | MPF Products |
|---|---|
| Model | Intended for/Compatible with the Following Thermostat Models: Nest Learning Thermostat (Gen 1), T100577. |
| Type | Learning Thermostats |
| Parts | 1-Year Replacement Warranty. |
Questions about this item
How do I confirm the 3.7V 200mAh battery is working after installing it in my Nest Gen 1 T100577?
After installation the thermostat should power on immediately, show a charging indicator, and hold its schedule without losing Wi-Fi connection during HVAC cycles.
What comes in the package and what must I supply myself?
The pack includes the 74Wh lithium-polymer battery and free installation tools; you only need a small Phillips screwdriver to open the thermostat base.
Which battery version matches the TL363844 part number for my first-generation Nest?
This 200mAh 3.7V pack is the direct replacement for part TL363844 and is listed as compatible with the Nest Learning Thermostat Gen 1 model T100577.
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