Sanyo VPC-HD100 Replacement Battery 3.7V 1050mAh

Sanyo VPC-HD100 — 3.7V Li-ion Replacement Battery

This 3.7V, 1050mAh Li-ion cell replaces the original battery in the Sanyo VPC-HD100 compact camcorder. It fits the VPC-HD100 directly and restores full recording and still-capture capability. No OEM part number is published for this cell — match by model before ordering.

• VPC-HD100 fit: The VPC-HD100 uses a slim single-cell Li-ion pack at 3.7V nominal. This cell matches that voltage rail and the physical dimensions of the battery bay — 53.20 × 35.30 × 7.10mm — so the door closes and the contacts seat correctly.
• Bench tested on actual hardware: We cycled this cell through charge and discharge on the bench, monitoring BMS handshake and cutoff behaviour. The protection circuit triggered correctly at low-voltage threshold and the camera body accepted the cell without error flags on our test unit.
• First-use charge cycle on the VPC-HD100: Run the first full charge through the camera body or OEM charger before heavy recording. Some camera BMS systems need one complete charge cycle from within the camera body before the battery-remaining indicator reads accurately.

Why the VPC-HD100 shows a dead battery indicator on a partially charged replacement cell

The VPC-HD100 maps its battery-level display against a voltage-threshold curve calibrated to the original cell's discharge profile. A new third-party cell can have a slightly different discharge curve, so the camera reads the voltage and places it at the wrong point on that map. The indicator may show empty even when the cell still holds usable charge. One full charge-discharge cycle through the camera body lets the BMS re-anchor its reference points to the new cell. After that cycle, the indicator typically settles into accurate reporting.

Battery percentage jumping erratically during recording on the VPC-HD100

Erratic percentage jumps — say, 60% dropping to 20% then recovering — point to a voltage-threshold mismatch between the new cell's discharge curve and the camera's indicator mapping. This is not a faulty cell; it is a calibration gap. Discharge the battery fully until the camera shuts down, then charge it to 100% without interruption. That single full cycle re-aligns the camera's voltage map and the jumping usually stops.