<s>
The	O
PowerBook	B-Device
5300	I-Device
is	O
the	O
first	O
generation	O
of	O
PowerBook	B-Device
laptops	B-Device
manufactured	O
by	O
Apple	O
Computer	O
to	O
use	O
the	O
PowerPC	B-Architecture
processor	I-Architecture
.	O
</s>
<s>
Released	O
in	O
August	O
1995	O
,	O
these	O
PowerBooks	B-Device
were	O
notable	O
for	O
being	O
the	O
first	O
to	O
feature	O
hot-swappable	B-Device
expansion	O
modules	O
for	O
a	O
variety	O
of	O
different	O
units	O
such	O
as	O
Zip	B-Operating_System
drives	I-Operating_System
;	O
PC	B-Architecture
card	I-Architecture
slots	O
as	O
standard	O
;	O
and	O
an	O
infrared	O
communication	O
port	O
.	O
</s>
<s>
In	O
common	O
with	O
most	O
preceding	O
Macintosh	O
portables	O
,	O
SCSI	B-Architecture
,	O
Serial	B-Protocol
,	O
and	O
ADB	B-Device
ports	I-Device
were	O
included	O
as	O
standard	O
.	O
</s>
<s>
An	O
internal	O
expansion	O
slot	O
was	O
also	O
available	O
for	O
installing	O
a	O
variety	O
of	O
modules	O
including	O
Ethernet	O
and	O
video	B-Device
cards	I-Device
to	O
drive	O
a	O
second	B-General_Concept
monitor	I-General_Concept
in	O
mirroring	O
or	O
dual-screen	B-General_Concept
modes	O
.	O
</s>
<s>
Although	O
a	O
significant	O
advance	O
over	O
preceding	O
portable	O
Macs	O
,	O
the	O
PowerBook	B-Device
5300	I-Device
suffered	O
from	O
a	O
number	O
of	O
design	O
faults	O
and	O
manufacturing	O
problems	O
that	O
have	O
led	O
to	O
it	O
being	O
cited	O
as	O
among	O
the	O
worst	O
Apple	O
products	O
of	O
all	O
time	O
.	O
</s>
<s>
Among	O
other	O
issues	O
,	O
it	O
is	O
one	O
of	O
the	O
first	O
laptops	B-Device
to	O
suffer	O
negative	O
publicity	O
from	O
battery	O
fires	O
,	O
and	O
features	O
a	O
hot-swappable	B-Device
drive	O
bay	O
with	O
insufficient	O
space	O
for	O
an	O
internal	O
CD-ROM	O
drive	O
.	O
</s>
<s>
The	O
PowerBook	B-Device
5300	I-Device
was	O
designed	O
during	O
1993	O
and	O
1994	O
under	O
the	O
codename	O
M2	O
.	O
</s>
<s>
Compared	O
with	O
the	O
preceding	O
PowerBook	B-Device
500	I-Device
series	I-Device
,	O
the	O
5300	O
was	O
explicitly	O
designed	O
to	O
be	O
as	O
small	O
as	O
possible	O
(	O
which	O
precluded	O
the	O
use	O
of	O
a	O
CD-ROM	O
drive	O
)	O
and	O
featured	O
a	O
more	O
compact	O
but	O
less	O
curvy	O
design	O
.	O
</s>
<s>
Pop-out	O
feet	O
were	O
used	O
instead	O
of	O
the	O
rotating	O
rocker-style	O
feet	O
typical	O
of	O
earlier	O
PowerBooks	B-Device
,	O
and	O
a	O
slightly	O
darker	O
shade	O
of	O
grey	O
was	O
used	O
for	O
the	O
plastic	O
casing	O
.	O
</s>
<s>
The	O
PowerBook	B-Device
190	I-Device
and	O
190cs	O
used	O
an	O
identical	O
casing	O
and	O
shared	O
many	O
features	O
and	O
internal	O
components	O
,	O
but	O
used	O
the	O
older	O
and	O
slower	O
Motorola	O
68LC040	O
processor	O
instead	O
,	O
which	O
could	O
be	O
upgraded	O
to	O
a	O
full	O
PPC	O
processor	O
by	O
swapping	O
the	O
logic	O
board	O
.	O
</s>
<s>
For	O
a	O
variety	O
of	O
reasons	O
,	O
the	O
PowerBook	B-Device
5300	I-Device
series	O
has	O
been	O
viewed	O
as	O
a	O
disappointment	O
.	O
</s>
<s>
Although	O
the	O
PowerPC	B-Architecture
603e	O
processor	O
built	O
into	O
the	O
5300	O
series	O
was	O
relatively	O
fast	O
for	O
its	O
time	O
,	O
because	O
these	O
machines	O
lacked	O
a	O
Level	O
2	O
cache	O
,	O
real	O
world	O
performance	O
was	O
much	O
less	O
than	O
the	O
CPU	O
frequency	O
would	O
suggest	O
.	O
</s>
<s>
Apple	O
had	O
a	O
prototype	O
CD-ROM	O
module	O
compatible	O
with	O
non-standard	O
80	O
mm	O
disks	O
that	O
would	O
have	O
been	O
used	O
with	O
the	O
PowerBook	B-Device
5300	I-Device
series	O
,	O
but	O
finished	O
versions	O
of	O
this	O
device	O
were	O
never	O
released	O
.	O
</s>
<s>
Instead	O
,	O
it	O
was	O
planned	O
that	O
the	O
5300	O
series	O
would	O
use	O
3.5inch	O
magneto-optical	B-Device
drive	I-Device
modules	O
initially	O
,	O
with	O
the	O
option	O
of	O
releasing	O
a	O
stretched	O
version	O
a	O
year	O
or	O
two	O
later	O
that	O
had	O
space	O
for	O
a	O
full-sized	O
CD-ROM	O
drive	O
.	O
</s>
<s>
Two	O
early	O
production	O
PowerBook	B-Device
5300s	I-Device
caught	O
fire	O
,	O
one	O
at	O
an	O
Apple	O
employee	O
's	O
house	O
and	O
another	O
at	O
the	O
factory	O
;	O
it	O
turned	O
out	O
that	O
the	O
Sony-manufactured	O
lithium	O
ion	O
batteries	O
had	O
overheated	O
while	O
recharging	O
.	O
</s>
<s>
Apple	O
recalled	O
the	O
5300s	O
sold	O
(	O
around	O
a	O
hundred	O
machines	O
)	O
and	O
replaced	O
the	O
batteries	O
on	O
these	O
and	O
all	O
subsequent	O
5300s	O
with	O
nickel	B-Device
metal	I-Device
hydride	I-Device
batteries	I-Device
that	O
provided	O
only	O
about	O
70%	O
the	O
endurance	O
.	O
</s>
<s>
At	O
the	O
time	O
,	O
the	O
media	O
viewed	O
the	O
problems	O
with	O
the	O
PowerBook	B-Device
5300	I-Device
series	O
as	O
yet	O
another	O
example	O
of	O
Apple	O
's	O
decline	O
.	O
</s>
<s>
Apple	O
's	O
next	O
high-end	O
series	O
of	O
portables	O
,	O
the	O
PowerBook	B-Device
3400	I-Device
series	O
introduced	O
in	O
February	O
1997	O
,	O
shared	O
an	O
almost	O
identical	O
form	O
factor	O
with	O
the	O
5300	O
,	O
right	O
down	O
to	O
being	O
able	O
to	O
share	O
many	O
of	O
the	O
same	O
hot-swappable	B-Device
expansion	O
modules	O
.	O
</s>
<s>
However	O
,	O
the	O
3400	O
series	O
were	O
substantially	O
different	O
on	O
the	O
inside	O
,	O
featuring	O
DMA	B-General_Concept
and	O
PCI	B-Protocol
architecture	O
.	O
</s>
<s>
The	O
first	O
series	O
of	O
PowerBook	B-Device
G3	O
portables	O
released	O
in	O
November	O
1997	O
were	O
internally	O
even	O
more	O
advanced	O
,	O
being	O
built	O
around	O
the	O
PowerPC	B-Device
G3	I-Device
processor	O
,	O
though	O
they	O
still	O
retained	O
the	O
basic	O
PowerBook	B-Device
5300	I-Device
form	O
factor	O
.	O
</s>
<s>
Apple	O
did	O
not	O
introduce	O
portables	O
with	O
an	O
entirely	O
new	O
form	O
factor	O
until	O
March	O
1998	O
with	O
the	O
release	O
of	O
the	O
"	O
Wallstreet	O
"	O
G3	O
PowerBooks	B-Device
.	O
</s>
