About this replacement
Topcon Hiper Pro / Hiper Lite Plus Series — 7.4V Li-ion Replacement Battery (24-030001-01)
This is a 7.4V 5200mAh Li-ion battery for the Topcon Hiper Pro and related GNSS receivers. It replaces OEM part number 24-030001-01 and fits the Hiper Lite Plus, Hiper-L1, Hiper Ga, and six additional models in the same platform family. Capacity is 38.48Wh — matched to the original specification.
- Hiper platform compatibility: The Hiper Pro, Hiper Lite Plus, Hiper-L1, and Hiper Ga share the same 7.4V battery bay, connector pinout, and BMS communication protocol. One part number covers the full platform because the power rail and handshake logic are identical across these receivers.
- Bench tested on actual hardware: We cycled this pack through a GNSS receiver load profile — powering satellite acquisition, RTK lock, and sustained data logging. The BMS held steady through each phase with no unexpected cutoffs at the rated cell voltage thresholds.
- Post-installation calibration: After fitting this pack, run a full calibration cycle through the Hiper's instrument menu before field deployment. The receiver maps battery state during that routine. Skipping it causes the low-battery warning to trigger early on your first job site session.
BMS lockout after the Hiper Pro sat unused in a carry case for months
Li-ion cells self-discharge during storage. If a pack sits long enough, cell voltage drops below the BMS recovery threshold — typically around 2.5V per cell. At that point the BMS enters a locked protection state and the receiver will not power on, even when connected to a charger. The fix is to connect the pack to the OEM charger and leave it for a full charge cycle — some BMS circuits need sustained trickle current for 30–60 minutes before they exit lockout and begin accepting a normal charge rate. If the charger LED never changes state after two hours, the cells have dropped below recoverable voltage.
Hiper receiver shuts down mid-session during USB data transfer to PC
USB data transfer adds a secondary draw on top of the active GNSS and logging load. On a partially depleted pack, the combined current pull causes a momentary voltage sag that trips the BMS undervoltage cutoff — even if the battery indicator showed sufficient charge before you plugged in. This is not a fault with the pack; it is a load-threshold event. Charge the battery to above 7.2V before initiating any PC transfer session and the cutoff will not trigger.