Chauvin Arnoux 8332B Replacement Battery 9.6V 3600mAh

Chauvin Arnoux 8332B / 8334B / 8335 — 9.6V Ni-MH Replacement Battery (91504301)

This is a 9.6V 3600mAh Ni-MH battery pack for the Chauvin Arnoux 8332B, 8334B, 8335, and 6116 power quality analyzers. These portable instruments draw sustained current during logging sessions and probe-powered measurements, and the original cells degrade faster than most users expect. Capacity is matched to the OEM spec at 3600mAh (34.56Wh).

• 8332B / 8334B / 8335 / 6116 platform: These models share the same 9.6V battery architecture, connector pinout, and BMS communication protocol. Swapping between them requires no adapter or firmware change — the pack seats and registers identically across the family.
• Bench tested on actual hardware: We cycled this pack under sustained logging load and monitored BMS behaviour through probe initialisation surges. The BMS held cutoff thresholds within spec and did not trip during the current spike at sensor power-up.
• Post-install calibration on the 8332B: After fitting this pack, run a full calibration cycle through the instrument menu before field deployment. The 8332B maps battery state during calibration, and skipping this step causes premature low-battery warnings on the first measurement session — even with a fully charged pack.

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

Ni-MH cells self-discharge at roughly 1–2% per day at room temperature. After several months in storage, cell voltage drops below the BMS recovery threshold — typically around 0.9V per cell on a 9.6V eight-cell pack. When voltage falls that low, the BMS enters a protective sleep state and refuses a standard charge cycle. To recover the pack, apply a slow trickle charge at low current (C/10 or less) for 30–60 minutes to bring cell voltage above the 1.0V-per-cell reinitialisation floor before attempting a normal charge.

Instrument readings resetting or drifting mid-logging session

This is not a measurement error — it is a voltage dropout under sustained sensor load. When the 8332B drives active probes over a long logging window, current draw climbs and cell voltage sags below the instrument's minimum operating threshold momentarily. The analyzer interprets this as a power interruption and resets the active session. Fitting a fresh pack at rated capacity resolves the sag. If dropouts continue, check that the instrument firmware is current, as older versions set a higher minimum voltage floor — update and retest with the pack reading above 10.5V under load.