About this replacement
Ezviz DP1S — 3.85V Li-Polymer Replacement Battery (MLP416281P)
This is a 3.85V, 6800mAh Li-Polymer battery for the Ezviz DP1S wireless indoor security camera. It replaces OEM part MLP416281P and fits the camera's original battery bay without modification. Use it when the original cell no longer holds charge and the camera begins dropping offline or failing to complete motion-triggered recordings.
- DP1S platform fit: The DP1S uses a flat Li-Polymer cell at 3.85V nominal — a voltage rail tied directly to the camera's SoC and IR LED array. The MLP416281P form factor is specific to this chassis; the BMS must match the camera's charge management circuit to prevent false low-battery flags in the Ezviz app.
- Bench tested on actual hardware: We cycled this cell through the DP1S charge circuit and verified the BMS correctly reported state of charge to the camera firmware. The cell held stable voltage under the combined IR LED and processor load during simulated motion-trigger events.
- First-install power cycle: After fitting the battery, power cycle the camera once through the Ezviz app. The firmware must register the new cell before motion event logs record correctly to cloud storage — skipping this step can cause the clip counter to stay at zero despite the camera detecting movement.
DP1S going offline in the Ezviz app after a battery swap
Swapping the battery clears the camera's active session token. The DP1S does not automatically re-authenticate to the Ezviz cloud after power is restored from a cold battery install. The camera appears online on the local network but the app shows it as unreachable or offline. Open the Ezviz app, go to device settings, and trigger a manual reconnect — the camera will re-register and resume live view within 60 seconds.
App reporting 0% or wrong battery percentage after fitting a new cell
The DP1S uses a voltage-threshold indicator, not a fuel gauge IC, to estimate battery level. When a new cell is installed, the firmware's stored discharge curve doesn't match the fresh cell's resting voltage, causing it to misread state of charge — often showing 0% or a low percentage immediately after install. Run the camera through one full charge cycle to 4.35V and allow it to draw down under normal use. After one complete cycle, the threshold map resets and the app percentage tracks correctly.