Sony DCR-DVD105 NP-FP91D Compatible Battery 7.4V 2300mAh

Sony DCR-DVD105 / DCR-DVD202E Series — 7.4V Li-ion Replacement Battery (NP-FP91D)

This is a 7.4V, 2300mAh Li-ion replacement for the Sony NP-FP91D battery. It fits the DCR-DVD105 and DCR-DVD202E family of mini-DVD camcorders. Slot it into the same battery bay as the original — same voltage, same connector, same 17.02Wh energy rating.

• DCR-DVD105 and DCR-DVD200 series fit: These camcorders share the same FP-series battery platform — same 7.4V rail, same InfoLITHIUM connector pinout, and the same BMS handshake for remaining-charge communication to the LCD display. One battery covers the full range.
• Bench tested on actual hardware: We cycled this cell through charge and discharge on the DCR-DVD series body. The BMS accepted the cell, charge termination triggered correctly at 8.4V, and the InfoLITHIUM percentage display tracked through the discharge curve without erratic jumps.
• InfoLITHIUM calibration on first use: On the DCR-DVD105, run the first charge cycle inside the camera body or Sony OEM charger — not a third-party USB adapter. The InfoLITHIUM system maps remaining-capacity data during that initial cycle. Skipping it causes the battery icon to misread from the first session.

Why the DCR-DVD105 rejects a new NP-FP91D replacement on first install

Sony's InfoLITHIUM protocol does more than read voltage — it polls the cell for capacity data over the multi-pin connector. A new cell with no charge history returns incomplete data, and some DCR-DVD bodies respond with a flashing battery icon or a "battery info" error. This is not a fault with the replacement cell. Power the camera off, insert the battery, then charge fully via the camera body or Sony charger before the first recording session. That single charge cycle initialises the data exchange and clears the warning.

Battery percentage jumping around on the DCR-DVD105 display

The InfoLITHIUM indicator maps percentage to specific voltage thresholds calibrated against Sony's original discharge curve. A replacement cell with a slightly different discharge slope will cause the percentage readout to jump — for example, dropping from 60% to 20% with no warning. This is a display calibration issue, not a capacity defect. Run two full charge-discharge cycles through the camera body and the indicator will remap to the actual discharge curve of the new cell. After the second cycle, readings stabilise across the full charge range.