SV10B Dopod 535 Replacement Battery 3.7V 950mAh

Dopod 535 — 3.7V Li-ion Replacement Battery (SV10B / SV16A)

This 3.7V 950mAh Li-ion cell replaces the SV10B and SV16A batteries fitted in the Dopod 535 smartphone. It restores power to the Windows Mobile platform for calls, messaging, and application use. Voltage and capacity match the original specification exactly.

• Dopod 535 fit: The 535 uses a single-cell 3.7V nominal rail with a contact layout shared across the SV10B and SV16A part numbers. Both OEM codes reference the same cell format and connector pin-out, so this battery covers both variants without modification.
• Bench tested on actual hardware: We cycled this cell through charge and discharge on the 535 platform. The BMS accepted the charge controller handshake on the first cycle, and the protection circuit triggered correctly at the low-voltage cutoff threshold during deep discharge testing.
• Fuel gauge recalibration on first use: On first installation, run one complete discharge down to auto-shutoff, then charge uninterrupted to 100% before normal use. This gives the fuel gauge IC a full reference curve against the new cell — skipping this step causes the percentage counter to read against the old cell's data.

Why the Dopod 535 reports wrong battery percentage after a cell swap

The 535 uses a fuel gauge IC that builds its state-of-charge model from learned discharge curves stored during previous cycles. When a new cell goes in, the IC still references the old cell's impedance and capacity profile. The result is a percentage readout that drifts — often reading 80% when the cell is closer to 50%. One full discharge-to-shutoff followed by an uninterrupted charge to 100% resets the coulomb counter and lets the IC map the new curve. After that single calibration cycle, percentage accuracy returns to normal.

Sudden shutdown at 20–30% on the replacement cell

This happens when the fuel gauge IC has not yet calibrated to the new cell and the phone hits a peak-draw moment — screen on, modem transmitting, and app active simultaneously. The cell voltage drops sharply under that combined load, crossing the hardware cutoff threshold even though the OS still shows charge remaining. It is a voltage cliff, not a capacity fault. Run the full calibration cycle first: discharge to auto-shutoff, charge to 100% without interruption. If shutdowns continue past that point, check that the battery connector is fully seated — a high-resistance contact causes the same voltage sag under load.