Fluke 830 Reference Standard Replacement Battery 7.4V 1800mAh

Fluke 830 Reference Standard — 7.4V Li-ion Replacement Battery (16-W44)

This 7.4V 1800mAh Li-ion battery replaces the original pack in the Fluke 830 Reference Standard. The 830 is a precision temperature calibration instrument used in industrial and laboratory environments to generate stable reference outputs for calibrating thermometers and temperature sensors. Voltage and cell chemistry match the OEM specification exactly — OEM part numbers 16-W44, 22480-1, and F198681 all cross to this pack.

• Fluke 830 platform fit: The 830 uses a dedicated battery bay with a keyed connector and a BMS handshake tied to the instrument's power management circuit. A mismatched cell voltage or incorrect protection threshold causes the instrument to refuse startup. This pack uses the same 7.4V nominal rail and cutoff thresholds the 830 expects.
• Bench tested on actual hardware: We cycled this pack through the 830's power-on sequence and ran sustained sensor output loads. The BMS held within tolerance under continuous reference signal generation and responded correctly to the instrument's charge termination signal.
• Post-install calibration cycle: After installing this pack, run a full calibration cycle through the instrument menu before field deployment. The 830 maps battery state during that cycle, and skipping it causes premature low-battery warnings during the first measurement session even when the pack is fully charged.

BMS lockout after the 830 sat unused in a carry case for months

Li-ion packs left unused for extended periods self-discharge below the BMS recovery threshold — typically under 2.5V per cell, or around 5.0V for a 2S pack. At that point the BMS enters a lockout state and the instrument shows no signs of life even when connected to a charger. The fix is to apply a low-current pre-charge from a compatible Li-ion charger set to recovery or trickle mode, which nudges the cell voltage back above the BMS wake threshold. Once the pack reads above approximately 6.0V, normal charging resumes and the instrument powers on.

830 shuts down mid-measurement when the probe initialises

When the 830 powers up a probe or sensor module, there is a brief current spike as the measurement circuit initialises. On a degraded or deeply discharged pack, this spike causes a voltage sag that trips the BMS undervoltage cutoff — the instrument cuts power as a protection response, not because the pack is empty. This is distinct from a low-battery shutdown and happens even when the indicator shows partial charge. Charge the pack fully to 8.4V before connecting probe modules, and confirm the instrument completes its startup self-test without interruption before beginning a measurement session.