12-4 PN: 10580-00343 Rev. H S820E UG
12-3 Battery Replacement Battery Replacement
The batteries will charge at a faster rate when the instrument is turned off or
is set to standby mode. Charging the batteries while the instrument is
running will require a longer time to reach a full charge.
To prolong the useful battery life, the internal charging circuit monitors the
battery temperature. Normal charging occurs when the battery temperature
is between 0 °C and 45 °C. Charging is paused when the battery temperature
is beyond this range.