2
8
MRP-
4424
Document
15180
Rev
D
03/
12/
97
15180:
D
Bat
ter
ies
avai
labl
e
fr
om
Fi
re•
Li
te:
PS-
1270
12-
vol
t,
7
amp/
hour
(
two
requi
red)
PS-
12120
12-
vol
t,
12
amp/
hour
(
two
requi
red)
S
t
a
n
d
b
y
B
a
t
t
e
r
y
C
u
r
r
e
n
t S
t
a
n
d
b
y
T
i
m
e
Conver
t
the
tot
al
f
rom
Tabl
e
1
24,
60 or
90 hours
to
amps
and
ent
er
her
e
a
m
p
sXh
o
u
r
s=
Ent
er
0.
25
for
5
mi
nut
es
in
al
ar
m
or
0.
5
for
10
mi
nut
es
in
al
ar
m
A
d
d
S
t
a
n
d
b
y
a
n
d
A
l
a
r
m
a
m
p
/
h
o
u
r
s =
Sel
ect
a
bat
ter
y
wi
th
an
equal
or
gr
eat
er
amp/
hour
r
at
ing
than
the
fi
gur
e
obt
ai
ned
in
Tabl
e
A-
2.
Bat
ter
ies
must
be
lead-
aci
d
type.
N
o
t
e
s
:1
)Al
ar
m
amp-
hour
s
assumes
a
maxi
mum
syst
em
dr
aw
of
3
amps
in
al
ar
m
for
5
mi
nut
es
(0.
25
amp/
hour
)
or
f
or
10
mi
nut
es
(0.
5
amp/
hour
)
2
)NFPA
72-
1993
Cent
ral
St
at
ion
and
NFPA
72-
1993
Local
and
Pr
opr
iet
ar
y
Fi
re
Al
ar
m
Syst
ems
requi
re
24
hour
s
of
st
andby.
3
)NFPA
72-
1993
Auxi
li
ar
y
and
Remot
e
St
at
ion
Fi
re
Al
ar
m
Syst
ems
requi
re
60
hour
s
of
st
andby.
4
)The
bat
ter
y
char
ger
i
n
thi
s
panel
wi
ll
char
ge
a
maxi
mum
of
15
amp/
hour
s
of
bat
ter
ies
wi
thi
n
48
hour
s
(7
amp/
hour
mi
ni
mum)
.
Bat
ter
ies
lar
ger
t
han
12
amp/
hour
wi
ll
r
equi
re
a
Fi
re•
Li
te
BB-
17F
or
ot
her
UL
li
st
ed
bat
ter
y
cabi
net
.
(e.
g.
Fi
re•
Li
te
BB-
17F)
T
a
bl
e
A
-
2
:
A
m
p
e
r
e
-
H
o
u
r
C
a
l
c
u
l
a
t
i
o
n
s
S
t
a
n
d
b
ya
m
p
/
h
o
u
r
sA
l
a
r
ma
m
p
/
h
o
u
r
sTot
a
l
a
m
p
/
h
o
u
r
sn
e
e
d
e
d
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