Palm Tungsten TX Replacement Battery 3.7V 1250mAh Li-Polymer

Palm Tungsten TX — 3.7V Li-Polymer Replacement Battery

This 3.7V, 1250mAh Li-Polymer cell replaces the original battery in the Palm Tungsten TX PDA. The Tungsten TX is a mid-2000s Palm OS handheld used for contacts, calendar, email, and third-party applications. When the original cell degrades and the device can no longer hold a charge, this battery restores normal operation.

• Tungsten TX platform fit: The Tungsten TX uses a compact Li-Polymer cell at 3.7V nominal. This replacement matches the original cell's voltage rail and physical footprint — 60.20 x 36.50 x 5.00mm — so the connector seats correctly against the board.
• Bench tested on actual hardware: We cycled this cell through charge and discharge on the Tungsten TX mainboard. The BMS accepted charge from a standard Palm cradle without fault flags, and voltage held steady under screen-on load.
• RAM power and data sync before removal: The Tungsten TX stores open application state and unsaved data in volatile SRAM powered directly by the main battery. Perform a full HotSync to your host computer before removing the old cell — any data not written to flash storage at the moment of power loss is gone permanently.

Why the Tungsten TX fails to boot after a new battery is installed

The Tungsten TX boot ROM checks for a minimum voltage threshold before launching Palm OS. A new Li-Polymer cell shipped in storage state often sits at 3.0V or below — below the threshold the device needs to begin the boot sequence. The device will show a blank screen or a low-battery icon and refuse to proceed. Charge the battery in the cradle or via USB for at least 30 minutes before pressing the power button for the first time.

Tungsten TX showing full charge but resetting unexpectedly under load

This symptom points to a degraded cell that can no longer sustain voltage when the backlight and processor peak simultaneously. The battery gauge on Palm OS reads resting voltage, not load voltage — so it reports 100% even when the cell sags under draw. With a fresh 1250mAh Li-Polymer cell, resting voltage after a full charge should read 4.1–4.2V at the test points on the connector. If unexpected resets continue after swapping the battery, check that the connector is fully seated — an intermittent contact produces the same symptom.