Kyocera 8KX-1 Replacement Battery 6V 2100mAh Ni-MH

Kyocera 8KX-1 / K-H150 / KB-S820 — 6V 2100mAh Ni-MH Replacement Battery

This is a 6V 2100mAh Ni-MH replacement battery for a range of Kyocera digital cameras including the 8KX-1, K-H150, KB-S820, and KD-70E. It slots into cameras where the original Ni-MH pack has lost the ability to hold a working charge. Capacity is rated at 12.6Wh.

• Kyocera 8KX-1 series compatibility: These camera models share a common 6V Ni-MH pack format with matching connector pinout and physical dimensions of 88.95 x 47.55 x 20.73mm. The BMS in each body reads cell voltage at insertion — the same nominal 6V rail satisfies the check across the full compatibility list.
• Bench tested on actual hardware: We cycled this cell through full charge and discharge runs on camera-class draw loads. The BMS accepted the cell without faulting, and voltage held consistently above the low-battery cutoff threshold through the discharge curve.
• First-charge protocol for Ni-MH camera cells: Charge this battery fully inside the OEM charger or camera body before your first shoot. Kyocera camera bodies map the battery-remaining indicator against a charge curve — skipping this step causes the display to show incorrect levels until the cell has completed one full cycle from within the system.

Why the Kyocera 8KX-1 shows a dead battery indicator on a partially charged replacement cell

Kyocera camera bodies track remaining charge by mapping voltage readings to a pre-set discharge curve stored in firmware. A new Ni-MH replacement cell has a slightly different discharge profile compared to the aged original — the body reads an unfamiliar voltage slope and flags it as depleted. This is not a fault with the battery. Running one complete charge cycle inside the camera body or OEM charger re-anchors the indicator to the new cell's actual curve. After that cycle, the remaining-battery display behaves correctly.

Battery percentage jumping erratically on the Kyocera camera display

Ni-MH cells have a flatter discharge curve than Li-ion, which makes voltage-based fuel gauging less precise — especially mid-charge when the curve plateaus. If the indicator jumps between readings during a shoot, the camera body is sampling at a flat region of the curve and losing reference. This is more pronounced in cold conditions, where Ni-MH terminal voltage dips temporarily under load. Charge the battery fully to 6V nominal before shooting, and let the body re-sample after the first full cycle.