About this replacement
Samsung HMX-R10 Series — 3.7V Li-ion Replacement Battery (IA-BH125C)
This is a 3.7V, 1000mAh Li-ion replacement battery for the Samsung HMX-R10 compact camcorder. It fits the HMX-R10, HMX-R10BP, HMXR10BNXXA, and HMXR10BN, along with additional variants sharing the same battery bay. The OEM part number is IA-BH125C.
- HMX-R10 series compatibility: These models share the same battery bay dimensions, 3.7V power rail, and BMS handshake protocol. The IA-BH125C connector and contact layout match across all listed variants, so the camera body communicates with the cell without modification.
- Bench tested on actual hardware: We ran this cell through charge and discharge cycles on the HMX-R10 platform. The BMS accepted the cell on first install, reported state of charge correctly, and did not trigger low-voltage cutoff prematurely under normal recording load.
- First-use charge cycle on the HMX-R10: Charge this battery to full inside the camera body or OEM charger before your first shoot. The HMX-R10 BMS maps voltage thresholds to its battery-remaining indicator on the first charge cycle — skipping this step can cause the indicator to read inaccurately throughout the cell's life.
Why the HMX-R10 battery indicator jumps erratically after fitting a new cell
The HMX-R10 uses a voltage-threshold system to estimate remaining charge. A new cell has a slightly different discharge curve than a worn OEM battery, so the camera's indicator mapping can misread the state of charge initially. This typically shows up as the percentage jumping from high to low suddenly, or the camera shutting off while the indicator still shows charge remaining. Running one complete charge cycle — from flat to full inside the camera — allows the BMS to recalibrate its threshold reference points to the new cell's curve.
HMX-R10 showing "no battery" or refusing to power on with a valid replacement cell
If the camera shows no battery detected or fails to power on, the BMS authentication check has not yet accepted the new cell. This happens most often when a replacement cell is installed with a low resting voltage after storage. Place the battery into an OEM-compatible charger first and bring it to full charge before inserting it into the camera body. Once the cell reaches 4.2V and is installed into a powered-off camera, cycle the power — the body should recognise it immediately.