About this replacement
Trimble R10 / V10 GNSS — 7.4V Li-ion Replacement Battery (76767)
This 7.4V Li-ion battery replaces the OEM pack in the Trimble R10 and V10 GNSS receivers. It carries 3600mAh (26.64Wh) and fits all R10 GNSS rover and base station configurations. The cell dimensions match the OEM form factor exactly at 78.45 × 54.20 × 25.14mm.
- R10 and V10 shared battery platform: Both receivers use the same 7.4V battery bay, connector pinout, and BMS handshake protocol. One pack covers both units — no adapter or firmware change needed.
- Bench tested on actual hardware: We ran this pack on an R10 receiver through a full satellite acquisition cycle and RTK lock sequence. The BMS held voltage within spec under sustained GNSS processing load, and no protection tripping occurred during antenna initialisation.
- First-field calibration cycle: Before taking the R10 out to a survey site, run a full calibration sequence through the instrument menu after installing this pack. The receiver maps battery state during that cycle — skip it and the low-battery warning triggers early on the first session, even with a full charge.
BMS lockout after the R10 sat unused in a carry case for months
Li-ion cells self-discharge over storage. If the pack drops below roughly 2.5V per cell, the BMS trips an undervoltage latch to prevent cell damage. At that point the R10 will not power on and the charger may show no activity. Place the pack in the OEM charger and leave it for at least 30 minutes — most chargers apply a low-current recovery pulse before returning to normal charge rate. If the charge LED activates after that window, the BMS has cleared and the pack will recover to full capacity.
RTK data logging drops or resets mid-session without a low-battery warning
Sustained GNSS processing, active radio link, and continuous data logging together draw more current than any single function alone. If the combined load pulls cell voltage down momentarily, the receiver can reset or drop the logging session before the battery indicator reacts. This happens most often on an aged or partially discharged pack where internal resistance is higher. Check cell voltage with a multimeter before heading to site — a healthy pack at rest should read 8.2V or above after a full charge cycle.