Toshiba Tecra R850 - Manual (Page 152)

Charge the battery pack only in an ambient temperature between 5
and 35 degrees Celsius. Otherwise, the electrolyte solution might leak,
battery pack performance might deteriorate and the battery life might
be shortened.
Never install or remove the battery pack without first turning off the
power and disconnecting the AC adaptor. Never remove the battery
pack while the computer is in Sleep Mode. Data could be lost.
Never remove the battery pack while the Wake-up on LAN function is
enabled. Data will be lost. Before you remove a battery pack, disable the
Wake-up on LAN function.
Charging the batteries
When the power in the battery pack becomes low, the Battery indicator will
flash orange to indicate that only a few minutes of battery power remain. If
you continue to use the computer while the Battery indicator flashes, the
computer will enable Hibernation Mode so that you do not lose any data,
and automatically turn itself off.
You must recharge a battery pack when it becomes discharged.
Procedures
To recharge a battery pack while it is installed in the computer, connect the
AC adaptor to the DC IN 19V jack and plug the other end into a working
outlet - the Battery indicator will glow orange while the battery is being
charged.
Use only the computer connected to an AC power source or optional
TOSHIBA Battery charger to charge the battery pack. Never attempt to
charge the battery pack with any other charger.
Charging Time (hours) for R850 series
Battery type Power off Power on
Battery pack (48Wh, 6
cell) about 3 about 3 ~11
Battery pack (66Wh, 6
cell) about 4 about 4 ~15
RTC battery Doesn’t charge about 10
RTC battery (High
Capacity) Doesn’t charge about 20
R850/R840/R830
User's Manual 5-5