About this replacement
Sony CCD-TRV108 / CCD-TRV Series — 7.4V Li-ion Replacement Battery (NP-QM71)
This 7.4V, 3200mAh Li-ion battery replaces the NP-QM71, NP-QM70, NP-FM70, and NP-FM71 packs used across Sony's MiniDV camcorder range. It fits the CCD-TRV108, CCD-TRV118, CCD-TRV128, CCD-TRV138, and over 60 additional Sony camcorder models that share the same battery bay and connector. Capacity is 3200mAh (23.68Wh) — identical to the original specification.
- CCD-TRV series compatibility: These models share the same physical battery bay, 7.4V nominal rail, and InfoLITHIUM BMS handshake. The connector pinout is identical across the NP-FM and NP-QM families, which is why one cell covers both series without modification.
- Bench tested on actual hardware: We cycled this battery on a CCD-TRV108 body and monitored the InfoLITHIUM communication protocol. The BMS initialised correctly, the battery-remaining display updated in real time, and charge acceptance through a Sony AC-L series charger completed without fault flags.
- First charge cycle on Sony InfoLITHIUM bodies: Run one full charge cycle inside the camcorder body or an OEM Sony charger before heavy use. Sony's InfoLITHIUM system calibrates the remaining-time display during this first cycle — skipping it can cause the indicator to read inaccurately for several sessions.
Why the CCD-TRV series rejects a new NP-FM / NP-QM cell on first install
Sony's InfoLITHIUM protocol requires the battery to present a valid data signal on the communication pin before the camera body will draw current. A new cell that has partially self-discharged during storage can present a voltage just below the BMS acceptance threshold. The fix is straightforward: seat the battery and place the camcorder on charge for at least 15 minutes before attempting to power on. This brings the cell voltage above the acceptance floor and allows the handshake to complete.
Battery percentage jumping or freezing on the CCD-TRV display
The InfoLITHIUM remaining-time display maps the cell's discharge curve to a time estimate, not a simple voltage percentage. A replacement cell with a slightly different discharge curve will cause the display to jump or stall until the BMS recalibrates. Run one full discharge — record until the camera shuts down — then charge to 100% without interruption. After that cycle, the display will track the new cell's curve accurately and the jumping stops.