Ideal OTDR II Replacement Battery 3.7V 10950mAh Li-Polymer

Ideal OTDR II / Quad Micro OTDR — 3.7V Li-Polymer Replacement Battery (R230052)

This 3.7V 10950mAh Li-Polymer battery replaces the R230052 pack in the Ideal OTDR II and Quad Micro OTDR fiber optic test instruments. It fits models R230000 and R230052. Voltage and capacity match the original spec exactly — the BMS handshake runs without modification.

• OTDR II and Quad Micro OTDR compatibility: Both instruments share the same 3.7V battery rail, connector pinout, and BMS communication protocol. One pack covers either unit without adapter or firmware workaround.
• Bench tested on actual hardware: We ran this pack through the OTDR II power-on sequence, laser launch, and sustained trace logging. The BMS held steady across the optical module's draw spikes during acquisition cycles — no mid-session cutoff was triggered.
• Calibration cycle before first field deployment: After installing this pack, run a full calibration cycle through the instrument's system menu before heading into the field. The OTDR II maps battery state during calibration. Skip this step and the low-battery warning fires early on the first measurement session — even with a full charge.

BMS lockout after the OTDR II sat unused in a carry case for months

Li-Polymer cells self-discharge slowly during storage. If the pack sits long enough, cell voltage drops below the BMS protection threshold — typically around 2.5V per cell — and the BMS latches into lockout mode. The instrument shows no charge activity and may not power on at all. Place the pack on a compatible charger that supports recovery charging; a slow 0.1C trickle input will bring the cell voltage back above the re-initialisation threshold and release the latch. Once voltage clears 3.0V, normal charging resumes.

Trace readings resetting or dropping out mid-logging session

This is not a software fault. During a sustained OTDR acquisition run, the optical module and processing board draw current simultaneously, and voltage sag across a degraded or partially charged cell can dip below the instrument's operational floor momentarily. That transient dropout is enough to reset the active measurement buffer. The fix is ensuring the pack is charged above 80% before a long logging session — not just powered on from any charge state. Check the instrument's battery indicator reads at least three bars before starting a multi-event trace.