About this replacement
Sony DCR-TRV330 / DCR-TRV460 Series — 7.4V Li-ion Replacement Battery (NP-QM71D)
This is a 7.4V, 2800mAh Li-ion replacement for the Sony NP-QM71D battery pack. It fits the DCR-TRV330, DCR-TRV460, DCR-DVD200E, DCR-TRV145E, and over 180 additional Sony MiniDV and DVD camcorder models. The cell matches the original voltage and capacity spec exactly.
- DCR-TRV and DCR-DVD platform fit: These Sony camcorder families share the same InfoLITHIUM M-series battery bay, 7.4V power rail, and BMS handshake protocol — which is why a single NP-QM71D cell works across all of them without modification.
- Bench tested on actual hardware: We ran this cell through charge and discharge cycles on a DCR-TRV-series body. The BMS accepted the cell without error flags, and the InfoLITHIUM charge indicator updated correctly through the discharge curve.
- First-use charge protocol for InfoLITHIUM bodies: Insert this battery and charge it fully inside the camcorder body or Sony AC adaptor before your first recording session. Sony's InfoLITHIUM BMS calibrates its remaining-time display against a charge cycle completed inside the OEM charge circuit — skipping this step can cause the time-remaining counter to read inaccurately from the start.
Sony InfoLITHIUM rejecting a third-party cell on first install
Sony's InfoLITHIUM system does more than measure voltage — it reads charge state data from the cell's internal circuit to calculate remaining record time. A new third-party cell with an uncalibrated state-of-charge register can cause the camera to display "---" or a blinking battery icon instead of a time estimate. This is a calibration gap, not a compatibility fault. Charge the battery fully via the Sony AC-L or camera body first, then power cycle the camcorder. After one complete charge cycle, the InfoLITHIUM display should resolve to a numeric readout.
Battery percentage jumping or resetting mid-recording on the DCR-TRV330
The DCR-TRV330 maps its InfoLITHIUM time-remaining display against the original NP-QM71D discharge curve. A replacement cell with a slightly different internal resistance profile discharges along a different voltage slope, so the camera's estimation algorithm can jump — showing 60 minutes remaining one moment and 20 the next. This is not cell failure; it is the camera misreading a voltage point that doesn't match its lookup table. Run two to three full charge and discharge cycles through the camera body. After conditioning, the camera's estimate stabilises as the BMS learns the actual discharge behaviour of the new cell.