Cisco Ultra HD Compatible Battery 2.4V 1800mAh Ni-MH FVBPU2

Cisco Ultra HD / U260 — 2.4V Ni-MH Replacement Battery (FVBPU2)

This is a 2.4V, 1800mAh Ni-MH replacement battery for the Cisco Ultra HD and U260 cameras. It replaces OEM part numbers FVBPU2, ABT1W, and ABT1WP1. The cell matches the original voltage rail and physical footprint, so it seats and connects without modification.

• Ultra HD and U260 compatibility: Both models share the same battery bay dimensions, connector pinout, and BMS handshake protocol — 50.40 × 28.90 × 14.50mm form factor with a 2.4V nominal Ni-MH chemistry that the camera's charge controller expects.
• Bench tested on actual hardware: We cycled this cell through a full charge and discharge on compatible hardware. The BMS accepted the cell without flagging an incompatible battery warning, and the charge controller stepped through the Ni-MH delta-V termination correctly.
• First-cycle initialisation on Cisco camera bodies: Run the first full charge cycle inside the camera body or OEM charger before heavy shooting. The Cisco BMS maps its battery-remaining display against the cell's discharge curve during that first cycle — skipping it causes the indicator to read inaccurately until one full cycle completes.

Battery percentage jumping erratically on the Cisco Ultra HD display

The Ultra HD's fuel gauge maps voltage thresholds from the original cell's discharge curve. A fresh Ni-MH replacement has a flatter discharge curve than a worn OEM cell, so the camera's indicator reads voltage steps differently and jumps between percentages. This is a calibration issue, not a cell fault. Run one complete charge-to-empty-to-full cycle through the camera body and the gauge will remap to the new cell's curve.

Cisco Ultra HD showing dead battery indicator on a replacement cell that still has charge

This happens when the camera body reads the cell's open-circuit voltage at rest and applies the OEM cutoff threshold — a fresh Ni-MH cell sitting in the bay can read slightly low at rest before its first charge cycle warms the electrodes. The camera interprets this as a depleted cell and locks out operation. Place the battery in the OEM charger first and bring it to a full charge, then reinsert. The resting voltage after a full charge will clear the low-voltage lockout, typically above 2.5V on a healthy 2.4V Ni-MH cell.