Sony Cyber-shot NP-FD1 Replacement Battery 3.7V 680mAh

Sony Cyber-shot DSC-T200/B Series — 3.7V Li-ion Replacement Battery (NP-FD1 / NP-BD1)

This 3.7V 680mAh Li-ion cell replaces the NP-FD1 and NP-BD1 batteries in the Sony Cyber-shot DSC-T200/B, DSC-T70, DSC-T700, and over 49 compatible Cyber-shot compact cameras. It matches the OEM voltage and physical footprint exactly — 46.10 × 35.60 × 5.53mm. Capacity is 680mAh (2.52Wh), consistent with original Sony spec.

• T-series compatibility: The DSC-T200/B, T70, and T700 share the same battery bay geometry and 3.7V power rail. Both NP-FD1 and NP-BD1 slot into these bodies — the OEM part numbers differ by product generation, not by voltage or connector type.
• Bench tested on actual hardware: We cycled this cell through a DSC-T200/B body including flash recycling loads and sustained live-view draw. The BMS held the charge curve without early cutoff, and the battery-remaining indicator updated correctly after one full charge cycle inside the camera body.
• First-install charge cycle on T-series bodies: Run one complete charge cycle through the camera body or OEM charger before heavy shooting. The T-series BMS maps the discharge curve on the first cycle — skipping this step can cause the battery percentage indicator to read inaccurately for the first few uses.

Flash capacitor recharge sag on the DSC-T200/B at low cell charge

The DSC-T200/B flash pulls a sharp current spike to recharge the capacitor between shots. As cell charge drops below roughly 3.5V, that spike causes a momentary voltage sag the BMS can detect as a stress event. The camera may extend the recycling interval or reduce flash output to protect the cell. This behaviour is normal near the end of a discharge cycle — swap the battery rather than forcing continued flash use at that point.

Battery percentage jumping erratically on the DSC-T200/B display

The Cyber-shot T-series maps battery percentage against a fixed voltage-threshold table calibrated to the OEM cell's discharge curve. A new replacement cell may have a slightly different discharge profile, causing the indicator to jump — for example, showing 80% then dropping to 50% within a few frames. This is a display mapping issue, not a cell fault. Run two to three full charge-discharge cycles and the indicator stabilises as the BMS learns the new cell's curve. After cycling, check that resting voltage reads between 4.1V and 4.2V at full charge.