Cam 808 Keychain Camera Replacement Battery 3.7V 180mAh

Keychain Cam 808 — 3.7V Li-Polymer Replacement Battery

This 3.7V, 180mAh Li-Polymer cell replaces the internal battery in the Keychain Cam 808 miniature keychain camera. It fits the compact body of the Cam 808 and restores video and photo recording capability lost to a degraded original cell. Physical dimensions are 30.60 × 16.00 × 5.10mm — measure your original before installing.

• Cam 808 platform fit: The Cam 808 uses a fixed Li-Polymer cell soldered or tabbed directly to the PCB. This cell matches the voltage rail and physical footprint that the Cam 808 charge circuit expects. Any mismatch in cell thickness or length will prevent the housing from closing.
• Bench tested on actual hardware: We ran this cell through charge and discharge cycles on the Cam 808 board and confirmed the protection circuit trips correctly at low-voltage cutoff, preventing the over-discharge damage that kills these small Li-Polymer cells permanently.
• First-charge procedure for Li-Polymer cells: Charge the Cam 808 fully via its USB port before first use. Small Li-Polymer cells shipped in storage state can read falsely low on first boot — a complete charge cycle before recording brings the cell to its rated 180mAh capacity.

Why the Cam 808 stops recording mid-clip after a battery swap

The Cam 808 firmware monitors cell voltage continuously during recording. If the replacement cell was stored below 3.0V, the protection circuit may trip under the load spike when the camera writes to the memory card. This looks like a random shutdown but it is actually a low-voltage cutoff event. Charge the camera fully before the first recording session — once the cell is at nominal 3.7V, mid-clip shutdowns caused by this stop.

Cam 808 powers on but drops off within seconds of pressing record

Video recording draws significantly more current than standby, and a freshly installed Li-Polymer cell in partial charge state cannot sustain that load. The voltage sags below the camera's cutoff threshold almost immediately, triggering an immediate shutdown. This is not a faulty cell — it is a state-of-charge issue from storage. Charge to full via USB, confirm the charge LED extinguishes, then test recording.