AudioVox Thera Pocket PC Replacement Battery LAB544060C 3.7V 1200mAh

AudioVox Thera / Maestro PDA1032S — 3.7V Li-Polymer Replacement Battery (LAB544060C)

This 3.7V 1200mAh Li-Polymer cell replaces the original LAB544060C battery in the AudioVox Thera Pocket PC, Maestro PDA1032S, and PDA-1032. It restores power to the handheld so the device can run its operating system, manage contacts and schedules, and maintain active application state. Capacity is 1200mAh (4.44Wh) — matched to the original OEM specification.

• Thera, Maestro PDA1032S, and PDA-1032 compatibility: All three models share the same battery bay dimensions, 3.7V nominal rail, and connector pinout. The BMS handshake protocol is identical across this platform, so one cell covers the full range without any modification.
• Bench tested on actual hardware: We cycled this cell through charge and discharge on the Thera platform and confirmed the BMS accepted the cell without fault codes. Charge termination triggered cleanly at full voltage with no thermal events.
• Sync before you swap: The Thera stores open files and application state in volatile RAM powered directly by the main battery. Remove the cell without first syncing to a host computer and that data is gone. Complete an ActiveSync or cradle sync before pulling the battery — every time.

Why the Thera Pocket PC loses data after a battery swap

The Thera runs its OS and holds open application data in SRAM, which requires continuous voltage from the main battery to retain its contents. Unlike flash storage, SRAM does not persist through a power cut — even a brief interruption clears it. Some units include a small backup capacitor that extends this window by a few seconds, but it is not enough to survive a full battery removal. Sync all data to a host PC before removing the cell, then reinstall the charged replacement without delay.

Thera not booting after new battery installed

A freshly shipped Li-Polymer cell may arrive below the minimum voltage the Thera's boot sequence requires to initialise the processor and load the OS. If the device shows nothing on screen or hangs at the boot logo, low cell voltage is the first thing to rule out. Place the unit in its cradle or connect the AC adapter and charge for at least 30 minutes before attempting to power on. If the device still does not boot after a full charge cycle, check that the battery connector is fully seated — the Thera's contact rail is shallow and partial contact prevents voltage delivery.