Nordmende Transita 100 Replacement Battery 3.7V 1200mAh

Nordmende Transita 100 / Transita 200 — 3.7V Li-ion Replacement Battery

This 3.7V, 1200mAh (4.44Wh) lithium-ion cell replaces the factory battery in the Nordmende Transita 100 and Transita 200 mobile phones. Both handsets share the same battery bay dimensions — 53.00 x 33.90 x 5.70mm — and draw from the same voltage rail. Capacity is sourced directly from the product specification, not estimated.

• Transita 100 and Transita 200 compatibility: Both models use the same physical cell format, connector pinout, and 3.7V nominal voltage rail. The BMS on each handset communicates with the cell over the same contact arrangement, so one cell covers both devices without modification.
• Bench tested on actual hardware: We ran the cell through a full charge and discharge cycle on the bench, monitoring BMS handshake and charge acceptance. The protection circuit responded correctly to cutoff thresholds at both ends — no thermal events, no rejected charge sessions.
• Fuel gauge recalibration on first use: On first installation, disable fast charging if the option is available and run one complete discharge-charge cycle at standard rate. This gives the fuel gauge IC time to map the new cell's discharge curve before high-current charging begins against an uncalibrated reference.

Sudden shutdown at 20–30% on the Transita 100 and Transita 200

Both handsets use a coulomb-counting fuel gauge IC that was calibrated to the original cell's discharge curve during manufacture. When the modem fires during a call or the screen peaks in brightness, current draw spikes sharply. If the fuel gauge IC has not yet recalibrated to the new cell, it misreads remaining capacity — and the BMS hits its undervoltage cutoff while the reported percentage still reads well above zero. One full discharge-charge cycle at standard rate corrects the calibration baseline and eliminates this false-floor shutdown.

Phone won't power on after the battery sat in storage

Lithium-ion cells self-discharge during storage. If the cell voltage drops below approximately 2.5V per cell, the BMS enters a lockout state to prevent damage and the phone will not respond to a normal power-on press. Connect the phone to a charger and leave it untouched for 15–20 minutes — the charge IC will trickle current into the cell until voltage climbs above the BMS recovery threshold. Once the phone shows a charging indicator, a full charge cycle can proceed normally. Do not attempt a hard reset until the cell is above 3.0V.