Batteries; Main Battery - Toshiba Satellite P20-25 Series Maintenance Manual

1 Hardware Overview
1.6

Batteries

The computer has two types of battery:
Main battery pack (18650 size)
RTC battery
The removable main battery pack is the computer's main power source when the AC adaptor
is not attached.
The battery specifications are listed in the table below.
Battery name

Main battery

RTC battery
1.6.1 Main Battery
Battery charging is controlled by a power supply microprocessor that is mounted on the
system board. The power supply microprocessor controls whether the charge is on or off and
detects a full charge when the AC adaptor and battery are attached to the computer. The
system charges the battery using quick charge or trickle charge.
Quick Battery Charge
When the AC adaptor is attached, there are two types of quick charge: quick charge
when the system is powered off and normal charge when the system is powered on.
The times required for charges are listed in the table below.
Normal charge (power on)
Quick charge (power off)
1-16
Material
Lithium-Ion
Lithium
Status
Output voltage
14.8 V
3.3 V
Charging time
12 hours or longer
About 4 hours
Satellite P20-25 Series Maintenance Manual
1.6 Batteries
Capacity
6450mAH
15 mAh