Trimble TSCe XHR-4/3AUX Compatible Battery 4.8V 4000mAh

Trimble TSCe Series — 4.8V Ni-MH Replacement Battery (XHR-4/3AUX)

This is a 4.8V, 4000mAh Ni-MH replacement battery for the Trimble TSCe and GIS TSCe handheld survey controllers. It also fits TDS data collectors and the H-075-335-200R-032 configuration. Cross-references include XHR-4/3AUX, HR4/3AU-F4C, A075-2003, and E-0191.

• TSCe and GIS TSCe compatibility: These models share the same 4.8V four-cell NiMH pack format, battery bay connector, and charge termination logic. The controller uses delta-V detection to end charging — cell count and chemistry must match exactly, which is why this specific pack works where generic alternatives fail BMS handshake.
• Bench tested on actual hardware: We cycled this pack through the TSCe charge and discharge sequence and monitored the delta-V cutoff response. The BMS terminated charge cleanly at capacity without false cutoffs. Discharge held voltage above the low-battery threshold through sustained GPS logging load.
• First-deployment calibration on the TSCe: After installing, run a full calibration cycle through the TSCe instrument menu before heading to site. The controller maps battery state during that cycle — skip it and the low-battery warning will fire early on your first field session, even with a fully charged pack.

TSCe shutting down mid-measurement with the battery showing charged

The TSCe draws a short current spike when it powers a connected GPS receiver or external sensor module. An aged or degraded cell cannot sustain voltage through that spike — the pack voltage collapses briefly and the controller interprets it as a dead battery and shuts down. A fresh 4000mAh Ni-MH pack holds internal resistance low enough to ride through that initialisation surge. If this is happening on a new pack, verify the battery contacts in the bay are clean and making full contact — oxidised contacts add resistance that mimics a weak cell under load.

TSCe display showing erratic battery percentage after reboot

The TSCe voltage-threshold indicator recalibrates to new cells over the first few charge cycles — this is normal and not a fault with the pack. On a freshly installed Ni-MH battery, the controller has no reference history for the new cell's voltage curve, so percentage readings jump or reset inconsistently at startup. Run two full charge-to-discharge cycles through normal field use and the readings stabilise. If erratic readings persist past three cycles, check that the battery bay cover is seating fully — a partial connection causes intermittent voltage drops that prevent the controller from reading the pack accurately.