Hikvision DS-MH611 Replacement Battery 3.7V 800mAh

Hikvision DS-MH611 / iDS-TCO100F — 3.7V Li-ion Replacement Battery (DV-02)

This is a 3.7V 800mAh (2.96Wh) Li-ion cell built to the DV-02 specification for the Hikvision DS-MH611 and iDS-TCO100F wireless security cameras. Both models share the same battery bay geometry, connector, and BMS handshake protocol. Swap it when the original cell no longer holds a useful charge between recharge cycles.

• DS-MH611 and iDS-TCO100F compatibility: Both cameras run the same 3.7V power rail, use an identical physical bay at 46 × 34 × 5.60mm, and negotiate charge state through the same BMS communication layer — so one cell covers both units without modification.
• Bench tested on actual hardware: We ran the DV-02 cell through charge, discharge, and motion-trigger cycles. The BMS held cutoff correctly at low-voltage threshold and accepted a full charge without thermal event. IR LED activation during night-vision draw did not trip the protection circuit.
• First-install power cycle: After fitting this cell, power cycle the camera once through the Hikvision app. The firmware must re-register the new cell before motion events log correctly to cloud storage — skipping this step can cause recording gaps on the first night.

Why the DS-MH611 stops recording mid-clip on weak Wi-Fi

When the DS-MH611 loses Wi-Fi signal and attempts reconnection, the radio draws a short current spike as it renegotiates with the router. On a depleted or degraded cell, that spike pushes the battery below the BMS protection threshold momentarily, triggering a shutdown before the clip saves. The camera logs an incomplete event and goes offline. Fitting a fresh cell at full charge raises the floor voltage enough that the reconnection spike stays within the safe operating window.

App showing 0% or stuck percentage after battery swap

The DS-MH611 uses a voltage-threshold indicator — not a fuel-gauge IC — to estimate charge level. When a new cell is installed, the camera's firmware compares resting voltage against stored threshold tables, and a mismatch can display 0% or a frozen value. This corrects itself after one complete charge-to-discharge-to-full-charge cycle. Plug the camera in until the indicator shows 100%, then let it discharge through normal use before recharging — the percentage will track accurately from that point.