About this replacement
GE Druck DPI 610 / DPI 615 — 7.2V Ni-MH Replacement Battery (191-126)
This is a 7.2V 4500mAh Ni-MH replacement battery for the GE Druck DPI 610 and DPI 615 portable pressure calibrators. It uses OEM part number 191-126 and fits the same bay as the original pack. Voltage and form factor match the instrument's internal power requirements exactly.
- DPI 610 and DPI 615 compatibility: Both instruments share the same battery bay geometry, connector pin-out, and 7.2V supply rail. The BMS handshake on each model responds to the same charge termination signal, so one pack covers both platforms without modification.
- Bench tested on actual hardware: We ran this pack through the DPI 610's initialisation sequence and monitored BMS behaviour during sensor load. The pack held voltage within spec across sustained pressure measurement cycles and passed charge termination without fault flags.
- First-use calibration cycle: After fitting this pack, run a full calibration cycle through the instrument menu before taking it into the field. The DPI 610 maps battery state during that sequence. Skipping it causes the low-battery indicator to trigger early on the first measurement session, even when the pack is fully charged.
BMS lockout after the DPI 610 sat unused in a carry case for months
Ni-MH cells self-discharge continuously in storage. If the instrument sat long enough, the pack voltage drops below the BMS recovery threshold — typically around 5.0–5.4V for a 6-cell 7.2V pack. At that point the BMS enters sleep mode and blocks both charge and discharge. The fix is a slow trickle charge at 0.1C through a compatible Ni-MH charger for 30–60 minutes to nudge the cell voltage back above the recovery floor. Once the BMS wakes, normal charging resumes.
Pressure readings resetting or dropping during a logging session
This is a voltage dropout issue, not a sensor fault. Under sustained sensor load, a degraded or partially charged Ni-MH pack can sag below the DPI 610's minimum operating voltage, causing the instrument to reset mid-log without a full power-off event. The symptom looks like a data gap or a sudden return to zero on the reading. Charge the pack fully before a logging session and check that terminal voltage sits at or above 7.2V under load before connecting the pressure module.