Eken H9 Action Camera Replacement Battery 3.7V 900mAh

Eken H9 / H9R / H8 / H8R Series — 3.7V Li-ion Replacement Battery (PG1050)

The PG1050 is a 3.7V 900mAh Li-ion cell for the Eken H9, H9R, H8, and H8R action cameras. It slots into the same battery compartment as the original cell and connects via the same three-pin contact plate. Capacity matches the stock specification at 900mAh (3.33Wh).

• H9 / H9R / H8 / H8R platform fit: These four models share the same compact chassis dimensions and battery bay. The PG1050 footprint — 32.77 × 29.16 × 10.89mm — matches the cavity, and the contact pin layout aligns with the camera's power rails across all four variants.
• Bench tested on actual hardware: We cycled this cell through the H9R body. The BMS accepted the cell on initial insertion, reported charge status correctly, and maintained stable voltage delivery through sustained 1080p recording. No mid-session cutoff was observed during load testing.
• First-cycle conditioning on the H9 body: Run the first full charge inside the camera body using the OEM USB cable — not an external charger. The H9's onboard BMS maps the cell's discharge curve during that first cycle, which anchors the battery-level indicator to the correct voltage thresholds for accurate remaining-charge display.

Battery percentage jumping or freezing on the H9 display

The H9 uses a voltage-threshold lookup table to translate cell voltage into the percentage shown on screen. A fresh replacement cell has a slightly different discharge curve shape than a worn OEM cell, so the camera's lookup table can misread voltage steps — causing the indicator to jump from 80% to 40% in seconds or to freeze at one level. This is a calibration issue, not a cell defect. Run one complete charge-and-discharge cycle through the camera body to let the BMS re-anchor its reference points. After that cycle, the display typically tracks within a normal margin of the actual state of charge.

H9 showing dead-battery icon immediately after inserting a fully charged replacement

This happens when the camera's BMS has not yet authenticated the new cell — it defaults to a low-voltage read on first contact. Remove the battery, reinsert it firmly until the cover latches flush, then connect the camera to USB power for at least 30 seconds before powering on. That brief charge handshake resets the BMS register. If the icon persists after a full USB charge cycle, check cell voltage at the contacts with a multimeter — a fully charged PG1050 should read approximately 4.2V.