About this replacement
Shimpo FGE-X / FGV-X Series — 4.8V Ni-MH Replacement Battery (BFGG0200511)
This is a 4.8V 2000mAh Ni-MH replacement battery for the Shimpo FGE-X, FGE-XY, FGV-X, FGV-XY, and six additional compatible models. It replaces OEM part numbers BFGG0200511, OSA312, FVE-BAT, and KRO6AA4. The FGE-X and FGV-X series are handheld digital force gauges used in manufacturing quality control and laboratory force measurement.
- FGE-X and FGV-X platform fit: These models share the same battery bay geometry, connector pin-out, and 4.8V supply rail. The instrument's BMS communicates charge state through a common protocol across the series, so one pack covers all listed models without modification.
- Bench tested on actual hardware: We cycled this pack through the FGE-X charge and discharge sequence. The BMS accepted the pack immediately, reached full charge without thermal event, and held voltage within spec under sustained sensor load across repeated measurement sessions.
- Post-install calibration cycle: After fitting this pack, run a full calibration cycle through the FGE-X instrument menu before taking field measurements. The instrument maps battery state during calibration — skipping this step causes the low-battery indicator to trigger prematurely on the first measurement session.
FGE-X BMS lockout after the instrument sat unused in a carry case for months
Ni-MH cells self-discharge even in storage. If the FGE-X sat unused for several months, the pack voltage can drop below the BMS recovery threshold — typically around 1.0V per cell. When voltage falls that low, the BMS enters a protective sleep state and will not respond to a standard charge cycle. Connect the charger and leave it for at least 30–60 minutes before expecting any response from the instrument. Most chargers apply a low-current recovery pulse at this stage before resuming normal charge.
FGE-X shuts down during USB data transfer to a PC
USB data transfer adds a secondary current draw on top of the active sensor load. On a depleted or degraded pack, the combined draw causes a momentary voltage sag that trips the under-voltage cutoff. This looks like a random shutdown but is reproducible on low-charge cycles. Charge the pack fully before any logging or transfer session, and check that the USB cable is not also powering a connected hub drawing current back through the instrument.