About this replacement
Leica Disto S910 / D810 Series — 3.7V Li-ion Replacement Battery (795460)
This 3.7V 2600mAh Li-ion battery fits the Leica Disto S910, Disto D810, and Disto D810 Touch laser distance meters. These are handheld surveying instruments used for measuring distances, areas, and angles in field and construction environments. Voltage and cell format match OEM part numbers 795460 and 806678.
- S910, D810, and D810 Touch compatibility: All three models share the same battery bay dimensions, connector pinout, and BMS communication protocol. The S910 adds digital angle measurement, but the power rail and charge circuit are identical across this series.
- Bench tested on actual hardware: We ran this pack through the S910's full startup sequence, including point-cloud capture and Bluetooth pairing. The BMS held steady through sensor initialisation and sustained angle-measurement logging without triggering a protection cutoff.
- Post-install calibration on the Disto S910: After fitting this battery, run a full calibration cycle through the instrument menu before field deployment. The S910 maps battery state during calibration — skipping this step causes premature low-battery warnings during your first measurement session out on site.
BMS lockout after the Disto sat unused in a carry case for months
Li-ion cells self-discharge slowly during storage. If the Disto S910 or D810 sits unused for several months, the pack can drop below the BMS recovery threshold — typically around 2.5V per cell. At that point, the BMS enters a protection lockout and the instrument will not power on or respond to charging. Connecting the charger for 15–30 minutes at a low input current is usually enough for the BMS to detect a safe voltage floor and re-initialise. If the charger shows no activity after 30 minutes, the pack has discharged below the recovery window entirely.
Disto S910 shuts off mid-session during USB data transfer to a PC
USB data transfer activates the instrument's radio module, display backlight, and file-system controller simultaneously. That combined draw pulls more current than laser measurement alone, and a partially degraded cell can sag enough in voltage to trigger the BMS undervoltage cutoff. The instrument powers off cleanly rather than freezing or corrupting data — but the transfer fails. Charge the pack fully before any transfer session, and check that the cell voltage reads at or above 3.9V at the instrument's battery status screen before connecting the USB cable.