Panasonic CGA-S301 Replacement Battery 3.7V 1050mAh

Panasonic SV-AV10 Series — 3.7V Li-ion Replacement Battery (CGA-S301)

This is a 3.7V, 1050mAh Li-ion cell that replaces the CGA-S301 and compatible OEM part numbers. It fits the Panasonic SV-AV10-R, SV-AV10-A, SV-AV10-S, SV-AS3A, SV-AV20U, and SV-AV100EG-S camcorders, among others. Dimensions are 53.20 × 35.30 × 7.10mm — same form factor as the original cell.

• SV-AV10 platform compatibility: The SV-AV10 series and related Panasonic D-snap camcorders share the same battery bay geometry and voltage rail. All models listed use the same 3.7V nominal input and identical connector orientation, so one cell covers the full range without adapters.
• Bench tested on actual hardware: We ran this cell through charge and discharge cycles on an SV-AV10 body. The BMS accepted the cell without error flags, and voltage held stable through both recording and playback draw cycles.
• First-use cycle for accurate indicator reading: Charge this battery fully inside the camcorder body or OEM charger before your first recording session. The SV-AV10's battery-remaining indicator maps to a charge curve — one full cycle from within the body lets the BMS calibrate the display correctly.

Battery percentage jumping on the SV-AV10 display after fitting a new cell

The SV-AV10 maps its battery indicator to a discharge curve stored in the BMS. A new cell has a slightly different internal resistance profile than an aged original, which causes the indicator to read inconsistently at first. This is not a fault with the cell — it is the camera recalibrating against the new curve. Run one full charge-to-depletion cycle inside the camcorder body and the indicator stabilises.

SV-AV10 showing no battery or refusing to power on with replacement cell installed

Some Panasonic D-snap bodies perform a voltage handshake on initial cell insertion. If the resting voltage of a new cell sits below the camera's minimum acceptance threshold after storage, the body reads it as absent or flat. Connect the cell to the OEM charger first and bring it to full charge — 4.2V — before inserting it into the camera body. One charge cycle via the charger is enough to clear the rejection.