Apple Macintosh PowerBook 150 - Manual (Page 79)

You can continue to use the computer while the battery is recharging, but the
battery will take longer to recharge if you do. With the computer in use,
recharging time depends on how often you use the hard disk, how bright the
screen is, whether you are using an external monitor, how deeply the battery
is depleted, and other factors.
If you recharge a fully depleted battery with the computer shut down, it takes
about 2 to 3 hours to bring the battery to 80 percent of its capacity. It takes
several more hours to bring the battery charge to 100 percent.
While the computer is shut down and the power adapter is plugged in, you
can remove a charged battery from the computer and replace it with a battery
you want to charge. If you do this, disconnect and then reconnect the power
adapter after inserting the second battery; otherwise the second battery will
not recharge.
Recharging in a recharger
A battery recharger and additional batteries are available for purchase. If you
purchase a recharger and an extra battery, you can charge one battery while
you use the other, so you always have a fully charged battery on hand.
The recharger can accommodate two batteries; it charges them one battery at
a time. You can put batteries in or take them out at different times.
The recharger must be plugged into an electrical outlet to charge a battery.
You can plug it in using the power adapter that came with your computer, or
you can purchase an additional (identical) power adapter from your Apple-
authorized dealer.
WARNING Use only the power adapter that came with your computer
with the recharger (or a power adapter designed for use with other 100
series PowerBooks). Using other types of power adapters may damage
the recharger, the power adapter, or both.
70 Chapter 6