Toshiba Tecra 8200 User Guide - Page 117
Charging the batteries, The main battery charges the backup and RTC batteries.
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117 Power Management Running the computer on battery power Charging the batteries To charge the main battery while it is in your computer, plug the computer into a live electrical outlet. The battery charges whether the computer is on or off. It takes approximately three hours to charge the battery with the computer turned off, or up to 10 hours when the computer is on. The main battery light ( ) glows amber while the battery is being charged, and glows green when it is fully charged. The battery may not start charging immediately under the following conditions: ❖ The battery is extremely hot or cold. To ensure that the battery charges to its full capacity, wait until it reaches room temperature. ❖ The battery is almost completely discharged. Leave the power connected and the battery should begin charging after a few minutes. The main battery charges the backup and RTC batteries. During normal use, the main battery keeps the other batteries adequately charged. Occasionally, the backup and RTC batteries may lose their charge completely, especially if you've had the computer turned off for a long time. To recharge: ❖ The backup battery, plug the computer in and leave it turned off for two and a half to five hours. ❖ The RTC battery, plug the computer in and turn it on for at least 24 hours.