Apple Computer sells the Macintosh Portable Battery Recharger (p/n M0275).
It comes with a power adapter and a cradle that holds the battery while it
is recharging.
Lind Electronic Design, Inc. (LED) markets a specially designed External
Battery Charger for the Macintosh Portable Rechargeable Battery. It comes
in a molded plastic box with carrying handle. It measures 3.3 x 6 x 7
inches, weighs 1.6 lbs. without the spare battery, and obtains power
through Apple's Power Adapter from a 115V AC wall outlet. It can also
charge the battery from a 12V DC power source such as a vehicle cigarette
lighter.
LED also sells a 12V DC Automobile Power Adapter that plugs into the
Macintosh Portable through the Power Adapter port. The Automobile Power
Adapter can operate the computer and charge its internal battery from a
12V DC power source. A regulator prevents the Power Adapter from
overcharging the Macintosh Portable's internal battery. It weighs only
0.75 lbs, measures 1.9 x 2.4 x 3.3 inches, and comes equipped with a
Velcro fastener strip to attach it to the side of the Macintosh Portable's
case. When the Adapter is not in use, all power cords and plugs fit into
the Portable case.
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