<s>
A	O
battery	B-Algorithm
pack	I-Algorithm
is	O
a	O
set	O
of	O
any	O
number	O
of	O
(	O
preferably	O
)	O
identical	O
batteries	O
or	O
individual	O
battery	O
cells	O
.	O
</s>
<s>
The	O
term	O
battery	B-Algorithm
pack	I-Algorithm
is	O
often	O
used	O
in	O
reference	O
to	O
cordless	O
tools	O
,	O
radio-controlled	O
hobby	O
toys	O
,	O
and	O
battery	O
electric	O
vehicles	O
.	O
</s>
<s>
Components	O
of	O
battery	B-Algorithm
packs	I-Algorithm
include	O
the	O
individual	O
batteries	O
or	O
cells	O
,	O
and	O
the	O
interconnects	O
which	O
provide	O
electrical	O
conductivity	O
between	O
them	O
.	O
</s>
<s>
Rechargeable	O
battery	B-Algorithm
packs	I-Algorithm
often	O
contain	O
a	O
temperature	O
sensor	O
,	O
which	O
the	O
battery	B-Application
charger	I-Application
uses	O
to	O
detect	O
the	O
end	O
of	O
charging	O
.	O
</s>
<s>
In	O
some	O
types	B-Algorithm
of	I-Algorithm
battery	I-Algorithm
,	O
electrolyte	O
specific	O
gravity	O
may	O
be	O
related	O
to	O
state	O
of	O
charge	O
but	O
this	O
is	O
not	O
measurable	O
on	O
typical	O
battery	B-Algorithm
pack	I-Algorithm
cells	O
,	O
and	O
is	O
not	O
related	O
to	O
state	O
of	O
charge	O
on	O
most	O
battery	B-Algorithm
types	I-Algorithm
.	O
</s>
<s>
More	O
complex	O
state	O
of	O
charge	O
estimation	O
systems	O
take	O
into	O
account	O
the	O
Peukert	B-Algorithm
effect	I-Algorithm
which	O
relates	O
the	O
capacity	O
of	O
the	O
battery	O
to	O
the	O
discharge	O
rate	O
.	O
</s>
<s>
An	O
advantage	O
of	O
a	O
battery	B-Algorithm
pack	I-Algorithm
is	O
the	O
ease	O
with	O
which	O
it	O
can	O
be	O
swapped	O
into	O
or	O
out	O
of	O
a	O
device	O
.	O
</s>
<s>
Though	O
some	O
might	O
consider	O
this	O
an	O
advantage	O
it	O
is	O
important	O
to	O
take	O
safety	O
precautions	O
when	O
servicing	O
a	O
battery	B-Algorithm
pack	I-Algorithm
as	O
they	O
pose	O
a	O
danger	O
as	O
potential	O
chemical	O
,	O
electrical	O
,	O
and	O
fire	O
risks	O
.	O
</s>
