About this replacement
Hikvision DS-MDT101/GLE — 3.8V Li-ion Replacement Battery (T18)
This is a 3.8V, 4850mAh (18.43Wh) Li-ion replacement battery for the Hikvision DS-MDT101/GLE wireless security camera. It replaces OEM part number T18. The cell fits the original battery compartment and connects to the same BMS interface the camera firmware expects.
- DS-MDT101/GLE fit: The DS-MDT101/GLE uses a 3.8V single-cell architecture. The T18 footprint, connector pinout, and BMS handshake are specific to this model — other Hikvision camera batteries at different voltages or form factors will not seat or register correctly.
- Bench tested on actual hardware: We cycled this cell through motion-trigger events and night-vision sequences on the DS-MDT101/GLE. The BMS negotiated charge cutoff at the correct 4.35V ceiling and held protection thresholds during the combined IR LED and processor draw spikes.
- First-install firmware registration: After fitting the new cell, power cycle the camera once through the Hik-Connect or IVMS-4500 app. The firmware must register the new cell before motion events log correctly to cloud storage — skipping this step can cause missed recordings even when the battery reads charged.
Camera going offline in the app after battery swap on DS-MDT101/GLE
Swapping the battery on the DS-MDT101/GLE clears the device's active session token. The camera attempts to re-establish its WiFi connection on boot, but if the firmware hasn't completed its initialisation cycle, the app registers it as offline rather than reconnecting. This is not a pairing fault — no re-adding to the account is needed. Open Hik-Connect, navigate to the device, and trigger a manual refresh. If it remains offline, hold the reset button for three seconds to force a clean reconnect without wiping configuration.
App displaying 0% or frozen percentage after installing replacement cell
The DS-MDT101/GLE uses a voltage-threshold indicator, not a fuel-gauge IC. When a new cell at a different resting voltage than the depleted original is installed, the firmware's stored threshold map is misaligned and reports 0% or a stale figure. One full charge-to-discharge cycle resets the threshold map to the new cell's actual voltage curve. Charge the camera to full via USB-C, let it run through at least one night-vision session, then recharge — the percentage display will track accurately from that point.