Motorola T192 Replacement Battery 3.6V 600mAh AANN4106

Motorola T192 / T193 Series — 3.6V Ni-MH Replacement Battery (AANN4106)

This is a 3.6V, 600mAh Ni-MH battery for the Motorola T192, T193, and T193m mobile handsets. It replaces OEM part numbers AANN4106 and AANN4106A. These early-2000s compact Motorola handsets share the same battery bay geometry, connector, and voltage rail across the T192/T193 line.

• T192, T193, and T193m compatibility: All three models use the same 3.6V single-cell Ni-MH pack with identical connector pinout and physical dimensions (55.24 × 35.57 × 6.95mm). No modification or adapter is needed when swapping between these variants.
• Bench tested on actual hardware: We cycled this cell through charge and discharge on the T192 platform. The charge IC accepted the Ni-MH cell without fault flags, and the BMS did not trip on a full discharge-to-cutoff run.
• Ni-MH recalibration on first use: After fitting this cell, run one complete discharge down to automatic shutoff, then charge uninterrupted to 100% before normal use. Ni-MH cells are sensitive to partial cycling — the handset's fuel gauge needs one full cycle to map the actual discharge curve of the new cell accurately.

Why the T192 reports wrong battery percentage after a cell swap

The T192 tracks charge state using a simple coulomb counter calibrated against the original cell's discharge curve. A new Ni-MH cell — even at the same rated capacity — has a slightly different voltage-versus-charge profile. Until the handset completes one full discharge-charge cycle, the counter is reading from the wrong map. Percentage readings may jump, stall, or show full charge while the phone cuts off unexpectedly. One uninterrupted full cycle corrects the calibration.

Sudden shutdown with battery percentage still showing on screen

This happens when the cell voltage drops sharply under load — typically during a call — faster than the fuel gauge updates the display. Ni-MH cells have a steeper voltage cliff near depletion than Li-ion, so the displayed percentage lags behind the actual cell state. The phone's protection circuit cuts power when cell voltage hits the low-voltage threshold, even if the screen still shows remaining charge. If this occurs repeatedly, allow the cell to complete two full discharge-charge cycles — the fuel gauge recalibrates closer to the real voltage cliff with each cycle, and early cutoffs become less frequent.