PS Magazine - TB 43-PS-676
PS, The Preventative Maintenance Monthly
ISSUE 676
MARCH 2009
48
PS 676
MAR 09
T
he BA-5390A/U lithium battery,
NSN 6135-01-517-6060, is used
in a lot of equipment, including
your SINCGARS radio. But a
communications problem between
the
complete
discharge
device
(CDD)
and
the
state-of-charge
indicator
(SOCI)
can
lead
to
unfortunate results.
Down the road, batteries will be available that correct this problem, but it will be a
while before they arrive. In the meantime, check for an activated CDD on any battery
you grab. Is the label gone? Is the yellow light on? And, if the CDD is activated, don’t
push the SOCI. It’s pointless because the measurement is no longer accurate.
Dear Half-Mast,
The IM-93/UD radiacmeter is supposed to have a dust cap. But I can’t find
an NSN in TM 11-6665-214-10 for replacing a lost cap. Is there an NSN?
SFC D.D.
Dear Sergeant D.D.,
No. You will need to order
dust caps directly from the
manufacturer, Arrow-Tech.
Call (701) 477-6461 or email
ron@arrowtechinc.com
or go to their website:
Someone in the know in your battery shop analyzes the battery and decides that
the battery doesn’t have enough charge left to power a piece of equipment. They
make the decision to activate the CDD so that the battery can be processed as
nonhazardous waste. So they peel off the CDD label and activate the discharging
indicator—a yellow light.
Now the battery goes on a shelf where it could sit for days while it’s discharging.
Someone not as much in the know comes along looking for a battery to use. He
presses the SOCI, which indicates the battery still has juice. He decides that’s enough
juice for him to use the battery.
The SOCI has not registered the amount of life that has left the battery since the
start of discharging. It still reads the same as it did when the CDD was activated. The
new user has been misled!
BA-5390A/U…
When the SOCI
and CDD
Don’t
Talk
IM-93/UD Radiacmeter…
Where Do I Get Cap?
here’s how
you could get
misled into
believing the
battery has
juice when it
doesn’t…
CDD
Active
Indicator
Removable Label;
CDD is underneath
Permanent
Marking
Before Activation
After Activation
Order cap from manufacturer
I’m
flashing
over
here! I’m almost
completely
discharged!
sorry, I
can’t see you
from here.
look at
both
sides
of the
battery when
you grab it from
the shelf!
hey!!
Permanent
Marking
676.48-49.indd
1-2
1/27/09
4:09:43 PM
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