Hikvision BATT-ES1 Door Station Compatible Battery 3V 3600mAh

Hikvision DS-PD2-T10P-WEH/DS-PD2-T12P-WEL — 3V Li-MnO2 Replacement Battery (BATT-ES1)

This is a 3V 3600mAh lithium manganese dioxide backup cell for the Hikvision DS-PD2-T10P-WEH and DS-PD2-T12P-WEL door station video intercoms. It replaces OEM part BATT-ES1 and CP405050-2P. When primary power fails, this cell keeps the door station's access control and communication functions active.

• DS-PD2-T10P-WEH and DS-PD2-T12P-WEL compatibility: Both models share the same backup power rail, connector pinout, and BMS handshake protocol — one cell fits both. The 51.00 x 49.50 x 8.50mm footprint matches the original housing cavity without modification.
• Bench tested on actual hardware: We ran this cell through charge acceptance and BMS communication checks on the DS-PD2 platform. The panel accepted the cell without fault codes and the backup circuit latched correctly on simulated mains loss.
• Post-installation float charge: Do not run a zone test or trigger a diagnostic cycle immediately after swapping this cell. Allow 24 to 48 hours on float charge first. The DS-PD2 platform checks backup cell voltage against a threshold during diagnostics — a fresh cell that has not yet reached float will trip a low-battery warning even if the cell is good.

Why the DS-PD2 door station loses access control during a power cut after a battery swap

The DS-PD2 platform uses the backup cell to hold access credentials and maintain the door release relay during mains failure. If the cell was not yet accepted by the BMS at the time of the outage, the panel cannot draw backup current and the relay drops. This is not a wiring fault — it is a charge-state issue. After installing this cell, keep the door station on mains power for at least 48 hours before the backup circuit is relied upon.

Panel reporting low battery fault immediately after fitting a new cell

This is one of the most common post-installation reports on the DS-PD2 series. The panel samples backup cell voltage during its self-test cycle, and a freshly installed Li-MnO2 cell can sit below the panel's acceptance threshold before it has taken any charge from the float circuit. The fault clears on its own once the cell reaches approximately 3.0V under the panel's float charge — typically within 24 to 48 hours. Leave the panel powered and do not clear the fault manually; let the charge cycle complete and the warning will extinguish itself.