Koonlung Mini DVR3 Compatible Battery 3.7V 1100mAh LSQ-88

Koonlung Mini DVR3 / HD609 — 3.7V Li-ion Replacement Battery (LSQ-88)

This is a 3.7V 1100mAh (4.07Wh) Li-ion cell that replaces the LSQ-88 battery in the Koonlung Mini DVR3 portable video recorder. It also fits the KB04, HD609, and additional compact recorder models sharing the same battery bay and connector. Dimensions are 53.10 x 38.40 x 8.00mm — measure your original cell before ordering if you are unsure of your exact model.

• Mini DVR3, KB04, HD609 shared battery platform: These models use the same physical cell format, connector pin-out, and voltage rail. The LSQ-88 part number covers all of them because the BMS in each recorder reads the same voltage curve from a single cell chemistry spec.
• Bench tested on actual hardware: We cycled this cell through charge and discharge on the bench, confirming the BMS accepted the cell without fault flags and that charge termination triggered correctly at full capacity.
• First-use charge cycle on the Mini DVR3: Insert the new cell and run a full charge inside the recorder before your first recording session. Compact DVR recorders like the Mini DVR3 calibrate the battery-remaining indicator against the first charge cycle — skipping this step can cause the indicator to read inaccurately from the start.

Why the Mini DVR3 shows a dead-battery icon on a freshly installed replacement cell

A new cell shipped in storage state typically sits at 3.5V or below. The Mini DVR3's low-voltage detection threshold can flag anything under roughly 3.6V as a depleted cell before the BMS has a chance to characterise it. The recorder is not rejecting the battery — it is reading a legitimate low resting voltage. Plug the recorder into its charge source immediately after inserting the new cell. Once the cell climbs above 3.6V, the dead-battery icon clears and the device operates normally.

Battery percentage jumping erratically after installing a new LSQ-88 cell

The Mini DVR3 maps its battery indicator to a voltage-threshold table calibrated against the original cell's discharge curve. A new cell discharges along a slightly different curve until it has completed one or two full cycles, so the percentage reading can jump or skip levels. This is a calibration lag, not a fault with the cell. Run two full charge-to-discharge cycles through the recorder and the indicator will track accurately. After the second cycle, resting voltage at full charge should read 4.1–4.2V.