Dranetz BP-HDPQ 9.6V Ni-MH Compatible Battery 2000mAh

Dranetz HDPQ-Xplorer400 — 9.6V Ni-MH Replacement Battery (BP-HDPQ)

This is a 9.6V Ni-MH 2000mAh replacement battery for the Dranetz HDPQ-Xplorer400 power quality analyzer. It also fits the HDPQ-Xplorer, HDPQ-Guide, and HDPQ-Visa. All four instruments share the same battery bay geometry, connector pinout, and OEM part reference BP-HDPQ / 118348-G1.

• HDPQ platform battery compatibility: The Xplorer400, Xplorer, Guide, and Visa all run from the same 9.6V Ni-MH pack and use identical BMS handshake logic. Swapping between these units requires no adapter or firmware change — the instrument reads the pack the same way across the platform.
• Bench tested on actual hardware: We cycled this pack through the HDPQ charge management circuit and confirmed the BMS accepted charge, reached full voltage, and held steady under the sustained sensor and display load these analyzers draw during active logging sessions.
• Calibration cycle before first field deployment: After installing this pack, run a full calibration cycle through the instrument menu before heading to site. The HDPQ maps battery state during calibration — skipping this step causes premature low-battery warnings during your first measurement session, even when the pack is fully charged.

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

Ni-MH cells self-discharge during storage, and if a pack sits long enough, cell voltage drops below the threshold the HDPQ's charge circuit will attempt to recover. The instrument may show no charge activity or simply refuse to power on. The fix is to apply a slow, low-current charge externally or through a compatible Ni-MH conditioner until cell voltage climbs above 1.0V per cell — roughly 8.0V pack total — before the instrument charger can take over. Once above that floor, insert the pack and let the HDPQ complete a standard charge cycle before use.

Readings drifting or logging session resetting mid-measurement

This happens when sustained sensor load — voltage probes, current clamps, and the display all drawing simultaneously — pulls pack voltage low enough to trigger a BMS undervoltage cutoff. The instrument doesn't always flag this as a battery fault; it may simply restart or drop the active log file. Check that the pack voltage reads at least 9.0V under load before starting a long survey. If the unit resets consistently during multi-channel logging, the cells have likely faded below usable capacity and a fresh pack will resolve it.