<s>
The	O
ThinkPad	B-Device
L-series	I-Device
laptops	B-Device
from	O
Lenovo	O
were	O
designed	O
with	O
the	O
theme	O
of	O
"	O
green	O
"	O
.	O
</s>
<s>
The	O
first	O
laptops	B-Device
in	O
the	O
series	O
were	O
described	O
by	O
Lenovo	O
as	O
being	O
the	O
environmentally	O
friendliest	O
products	O
in	O
the	O
ThinkPad	B-Operating_System
range	O
.	O
</s>
<s>
The	O
predecessor	O
of	O
the	O
ThinkPad	B-Device
L	I-Device
series	I-Device
was	O
the	O
ThinkPad	B-Operating_System
A	O
series	O
,	O
conceived	O
as	O
a	O
desktop	B-Device
replacement	O
.	O
</s>
<s>
The	O
ThinkPad	B-Operating_System
A	O
series	O
was	O
discontinued	O
in	O
favor	O
of	O
two	O
product	O
lines	O
,	O
the	O
ThinkPad	B-Operating_System
R	O
series	O
and	O
the	O
ThinkPad	B-Operating_System
G	O
series	O
.	O
</s>
<s>
The	O
ThinkPad	B-Operating_System
R	O
series	O
introduced	O
Lenovo	O
's	O
new	O
product	O
naming	O
system	O
,	O
as	O
indicated	O
in	O
the	O
published	O
tech	O
specs	O
.	O
</s>
<s>
The	O
R61	O
laptop	B-Device
was	O
renamed	O
as	O
R400	O
and	O
R500	O
.	O
</s>
<s>
The	O
R400	O
laptop	B-Device
had	O
a	O
14.1	O
"	O
display	O
,	O
while	O
the	O
R500	O
laptop	B-Device
had	O
a	O
15.4	O
"	O
display	O
.	O
</s>
<s>
From	O
the	O
R	O
series	O
onwards	O
,	O
all	O
ThinkPad	B-Operating_System
models	O
transitioned	O
to	O
widescreen	O
displays	O
.	O
</s>
<s>
ThinkPad	B-Operating_System
R	O
2008	O
–	O
2010	O
,	O
</s>
<s>
The	O
L-series	O
laptops	B-Device
were	O
launched	O
in	O
2010	O
to	O
replace	O
the	O
ThinkPad	B-Operating_System
R	O
series	O
.	O
</s>
<s>
The	O
first	O
two	O
L-series	O
models	O
–	O
the	O
ThinkPad	B-Operating_System
L412	O
and	O
the	O
ThinkPad	B-Operating_System
L512	O
laptops	B-Device
–	O
were	O
predicted	O
to	O
be	O
launched	O
on	O
Earth	O
Day	O
in	O
2010	O
.	O
</s>
<s>
The	O
L412	O
and	O
L512	O
laptops	B-Device
met	O
eight	O
military	O
specifications	O
,	O
including	O
parameters	O
for	O
high	O
and	O
low	O
temperature	O
,	O
vibration	O
,	O
altitude	O
and	O
dust	O
.	O
</s>
<s>
However	O
,	O
the	O
L-series	O
laptops	B-Device
remained	O
relatively	O
lightweight	O
starting	O
at	O
5.2lbs	O
( ≈	O
2.36kg	O
)	O
.	O
</s>
<s>
The	O
L-series	O
models	O
were	O
also	O
reputed	O
to	O
be	O
Lenovo	O
's	O
greenest	O
laptops	B-Device
.	O
</s>
<s>
Lenovo	O
indicated	O
that	O
they	O
were	O
40%	O
more	O
power	O
efficient	O
than	O
other	O
laptops	B-Device
,	O
and	O
were	O
made	O
from	O
recycled	O
plastic	O
from	O
office	O
water	O
jugs	O
and	O
miscellaneous	O
used	O
equipment	O
.	O
</s>
<s>
The	O
L-series	O
laptops	B-Device
were	O
made	O
available	O
with	O
a	O
variety	O
of	O
options	O
,	O
allowing	O
them	O
to	O
be	O
customized	O
to	O
handle	O
business	O
demands	O
,	O
or	O
used	O
as	O
entry-level	O
laptops	B-Device
.	O
</s>
<s>
The	O
laptops	B-Device
could	O
be	O
equipped	O
with	O
Intel	O
i3	O
or	O
i5	O
processors	O
,	O
integrated	O
graphics	O
,	O
or	O
discrete	O
AMD	B-Device
Radeon	I-Device
graphics	O
.	O
</s>
<s>
The	O
L	O
series	O
was	O
designed	O
to	O
improve	O
on	O
the	O
features	O
of	O
the	O
R-series	O
laptops	B-Device
.	O
</s>
<s>
L-series	O
laptops	B-Device
were	O
reputed	O
to	O
increase	O
performance	O
over	O
the	O
R	O
series	O
by	O
150%	O
and	O
improve	O
boot	O
and	O
shutdown	O
times	O
on	O
Windows	O
by	O
57%	O
.	O
</s>
<s>
The	O
laptop	B-Device
chassis	O
was	O
also	O
11%	O
thinner	O
and	O
12%	O
lighter	O
than	O
the	O
R-series	O
models	O
it	O
was	O
introduced	O
to	O
replace	O
.	O
</s>
<s>
Upon	O
release	O
,	O
the	O
ThinkPad	B-Operating_System
L412	O
was	O
praised	O
by	O
reviewers	O
,	O
with	O
Laptop	B-Device
Magazine	O
calling	O
it	O
a	O
"	O
value-priced	O
business	O
notebook	B-Device
"	O
.	O
</s>
<s>
The	O
review	O
also	O
praised	O
the	O
laptop	B-Device
for	O
green	O
features	O
,	O
performance	O
,	O
and	O
ergonomic	O
design	O
.	O
</s>
<s>
The	O
L412	O
was	O
well	O
received	O
by	O
Laptop	B-Device
Magazine	O
,	O
with	O
the	O
reviewer	O
giving	O
the	O
laptop	B-Device
a	O
score	O
of	O
4	O
out	O
of	O
5	O
stars	O
.	O
</s>
<s>
Similarly	O
,	O
NOTEBOOKCHECK	O
gave	O
the	O
ThinkPad	B-Operating_System
L412	O
laptop	B-Device
a	O
score	O
of	O
75%	O
(	O
good	O
)	O
from	O
an	O
average	O
of	O
five	O
scores	O
from	O
seven	O
reviews	O
.	O
</s>
<s>
PCWorld	O
listed	O
the	O
pros	O
of	O
the	O
ThinkPad	B-Operating_System
L412	O
laptop	B-Device
as	O
being	O
eco-friendly	O
and	O
affordable	O
,	O
while	O
stating	O
that	O
the	O
cons	O
were	O
the	O
loud	O
keyboard	O
and	O
low	O
battery	O
life	O
.	O
</s>
<s>
The	O
ThinkPad	B-Operating_System
L512	O
also	O
received	O
positive	O
reviews	O
,	O
with	O
reviewers	O
comparing	O
it	O
with	O
both	O
the	O
ThinkPad	B-Operating_System
T	O
series	O
and	O
the	O
ThinkPad	B-Operating_System
SL	O
series	O
.	O
</s>
<s>
NotebookReview.com	O
noted	O
that	O
the	O
L512	O
was	O
almost	O
identical	O
to	O
comparable	O
SL-series	O
laptops	B-Device
in	O
appearance	O
,	O
with	O
"	O
a	O
consumer	O
take	O
on	O
the	O
rugged	O
,	O
business-oriented	O
T-series	O
ThinkPad	B-Operating_System
"	O
.	O
</s>
<s>
The	O
review	O
also	O
indicated	O
that	O
the	O
chassis	O
flex	O
was	O
less	O
than	O
the	O
Edge	O
15	O
,	O
but	O
more	O
than	O
the	O
T-series	O
laptops	B-Device
.	O
</s>
<s>
The	O
green	O
features	O
of	O
the	O
L512	O
also	O
received	O
notice	O
,	O
with	O
Notebook	B-Device
Review	O
stating	O
that	O
"	O
The	O
L	O
series	O
offers	O
up	O
to	O
30%	O
post-consumer	O
content	O
,	O
LED-backlit	O
screens	O
and	O
green	O
packaging	O
that	O
takes	O
up	O
20%	O
less	O
space.	O
"	O
</s>
<s>
In	O
February	O
2011	O
,	O
the	O
ThinkPad	B-Operating_System
L420	O
and	O
L520	O
were	O
announced	O
by	O
Lenovo	O
.	O
</s>
<s>
The	O
2011	O
line	O
of	O
L-series	O
laptops	B-Device
included	O
up	O
to	O
second	O
generation	O
Intel	O
i7	O
processors	O
,	O
Intel	O
HD	O
Graphics	O
or	O
options	O
for	O
AMD	B-Device
Radeon	I-Device
discrete	O
graphics	O
,	O
Lenovo	O
Enhanced	O
Experience	O
2.0	O
for	O
Windows	O
7	O
,	O
and	O
solid-state	O
storage	O
drives	O
.	O
</s>
<s>
The	O
L420	O
and	O
L520	O
laptops	B-Device
offered	O
battery	O
life	O
of	O
up	O
to	O
11.5	O
hours	O
and	O
10.8	O
hours	O
respectively	O
with	O
the	O
optional	O
9-cell	O
battery	O
.	O
</s>
<s>
Lenovo	O
also	O
indicated	O
that	O
the	O
L-series	O
laptops	B-Device
are	O
lighter	O
than	O
similar	O
,	O
competing	O
products	O
.	O
</s>
<s>
The	O
L	O
series	O
offered	O
savings	O
on	O
operating	O
costs	O
of	O
40%	O
annually	O
,	O
as	O
compared	O
to	O
previous	O
generation	O
ThinkPads	B-Operating_System
.	O
</s>
<s>
As	O
with	O
most	O
ThinkPad	B-Operating_System
laptops	B-Device
,	O
the	O
L-series	O
models	O
featured	O
certifications	O
from	O
Energy	O
Star	O
and	O
EPEAT	O
Gold	O
.	O
</s>
<s>
The	O
Laptop	B-Device
Magazine	O
review	O
of	O
the	O
ThinkPad	B-Operating_System
L420	O
indicated	O
the	O
pros	O
as	O
being	O
the	O
"	O
great	O
keyboard	O
,	O
affordable	O
price	O
,	O
good	O
battery	O
life	O
,	O
and	O
quick	O
boot	O
time	O
"	O
.	O
</s>
<s>
The	O
battery	O
life	O
marked	O
an	O
improvement	O
over	O
the	O
ThinkPad	B-Operating_System
L412	O
,	O
which	O
was	O
criticized	O
for	O
its	O
low	O
battery	O
life	O
.	O
</s>
<s>
Laptop	B-Device
Magazine	O
indicated	O
that	O
the	O
cons	O
were	O
weak	O
audio	O
,	O
multitouch	O
gestures	O
,	O
and	O
bland	O
design	O
.	O
</s>
<s>
The	O
L520	O
was	O
awarded	O
a	O
Business	O
Buy	O
award	O
from	O
Expert	O
Reviews	O
,	O
which	O
indicated	O
in	O
its	O
review	O
that	O
the	O
laptop	B-Device
would	O
appeal	O
to	O
users	O
who	O
preferred	O
"	O
function	O
over	O
form	O
"	O
.	O
</s>
<s>
The	O
review	O
praised	O
the	O
laptop	B-Device
for	O
performance	O
.	O
</s>
<s>
In	O
May	O
2012	O
,	O
the	O
Thinkpad	B-Operating_System
L430	O
and	O
L530	O
were	O
announced	O
by	O
Lenovo	O
.	O
</s>
<s>
They	O
have	O
the	O
new	O
,	O
island	B-Device
type	I-Device
keyboard	I-Device
.	O
</s>
<s>
Introduced	O
in	O
October	O
2013	O
,	O
these	O
feature	O
the	O
new	O
4th-gen	O
Haswell	B-Device
Intel	I-Device
CPUs	I-Device
,	O
and	O
the	O
new	O
press-to-click	O
5-point	O
touchpad	O
,	O
integrating	O
the	O
trackpoint	O
's	O
buttons	O
with	O
the	O
top	O
of	O
the	O
touchpad	O
.	O
</s>
<s>
Features	O
the	O
4th-gen	O
Haswell	B-Device
Intel	I-Device
CPUs	I-Device
and	O
the	O
5th-gen	O
Broadwell	B-General_Concept
Intel	I-General_Concept
CPUs	I-General_Concept
.	O
</s>
<s>
Introduced	O
in	O
first	O
quarter	O
2016	O
,	O
these	O
feature	O
the	O
new	O
6th-gen	O
Skylake	B-Architecture
Intel	I-Architecture
CPUs	I-Architecture
.	O
</s>
<s>
Introduced	O
in	O
first	O
quarter	O
2017	O
,	O
these	O
feature	O
the	O
new	O
7th-gen	O
Kabylake	B-Device
Intel	I-Device
CPUs	I-Device
.	O
</s>
<s>
Introduced	O
in	O
first	O
quarter	O
2018	O
,	O
these	O
feature	O
Celeron	O
,	O
7th-gen	O
,	O
or	O
the	O
new	O
8th-gen	O
Kabylake	B-Device
R	O
(	O
refresh	O
)	O
Intel	O
CPUs	O
.	O
</s>
<s>
Introduced	O
in	O
first	O
quarter	O
2019	O
,	O
these	O
feature	O
Celeron	O
or	O
the	O
new	O
8th-gen	O
Whiskey	B-Device
Lake	I-Device
Intel	I-Device
CPUs	I-Device
.	O
</s>
