VIAVI JDSU OLP-82P Replacement Battery 3.7V 5400mAh

VIAVI JDSU OLP-82P — 3.7V Li-ion Replacement Battery (FITP-RBP2)

This is a 3.7V Li-ion battery rated at 5400mAh (19.98Wh), built to the FITP-RBP2 specification. It fits the JDSU OLP-82P optical power meter — a handheld instrument used by fiber optic technicians to measure signal loss and optical levels in the field. Connector orientation and BMS handshake match the original pack.

• OLP-82P platform fit: The OLP-82P draws steady low current during measurements but spikes briefly when the optical detector module initialises at power-on. This pack's BMS is rated to absorb that inrush without triggering an overcurrent cutoff — a fault that can look like a dead battery even with a full charge.
• Bench tested on actual hardware: We ran this pack through repeated power cycles on the OLP-82P, including back-to-back detector initialisations and sustained logging sessions. The BMS held stable across all cycles with no false cutoff events.
• Post-install calibration on the OLP-82P: After fitting this pack, run a full calibration cycle through the instrument menu before field deployment. The OLP-82P maps battery state during calibration — skipping this step causes premature low-battery warnings to fire during your first measurement session even when the pack has significant capacity remaining.

OLP-82P shutting down mid-measurement despite showing adequate charge

The OLP-82P's optical detector draws a short current spike each time it re-initialises — this happens automatically during continuous logging sessions when the instrument re-syncs to a reference wavelength. If the cell voltage has sagged slightly under sustained load, that spike can push the BMS past its cutoff threshold even though the display shows remaining charge. The instrument cuts power as a protection response, not because the battery is empty. A pack with higher internal resistance — typical in aged cells — hits this threshold faster. This FITP-RBP2 replacement carries a fresh cell with lower internal resistance, which keeps voltage sag within tolerance during those re-initialisation events.

New pack won't charge after the OLP-82P sat unused for several months

Li-ion cells that sit below approximately 2.5V enter a deep-discharge state where the BMS locks out standard charge current as a safety measure. The OLP-82P charger sees the locked BMS and does nothing — the charge LED may not even light. Most chargers for this instrument do not apply a recovery pre-charge pulse automatically. To recover the pack, connect it to the charger and leave it undisturbed for 20–30 minutes; some chargers trickle a small recovery current that gradually brings cell voltage above the 2.5V re-enable threshold. If the LED remains off after 30 minutes, check that the charger output is delivering at least 4.2V at the connector before assuming the pack is faulty.