MTX
‐
3G
‐
JAVA
Family
www.mtx
‐
terminals.com
www.mtxm2m.com
2015/10
v1.6
Page
65
/
109
MTX
M2M®
by
MATRIX
ELECTRONICA
S.L.U
4.9
Internal Li‐Po battery
In
the
MTX
‐
3G
‐
JAVA
modem
family,
the
BAT
suffix
means
that
the
internal
3.7V
1650mAh
Li
‐
Po
battery
is
attached.
The
unit
is
shipped
with
the
battery
disconnected.
Please
open
the
unit
and
connect
the
battery
connector
to
the
main
board
and
then
plug
in
the
power
supply
to
the
RJ
power
connector
for
around
5
hours
to
fully
charge
the
battery.
Internal
batteries
can
be
ordered
for
MTX
‐
3G
‐
JAVA
modems
with
either
GPS
or
RF
variants.
In
any
case,
you
can
ask
to
remove
the
GPS
or
RF.
The
battery
level
can
be
known
using
the
AT
command
AT^SBV.
The
command
result
is
given
in
mV.
When
charging,
the
previous
value
is
increased
by
+200mV.
It
is
also
possible
to
know
whether
the
charger
is
connected
by
testing
the
DTR
signal.
With
the
battery
attached,
the
VEXT
voltage
value
(DB15
connector,
pin
10)
is
approximately
3.86V
when
the
charger
is
plugged
in.
If
not,
this
values
drops
to
approximately
3.46V.
We
do
not
guarantee
fully
working
features
for
battery
voltages
below
3.6V.
We
strongly
recommend
that
you
switch
the
modem
off
completely
when
this
occurs.
To
do
this,
please
follow
this
procedure:
Disable
Automatic
restart
after
shutdown.
Please
remember
that
this
feature
is
active
by
default
and
so
the
modem
will
try
to
switch
on
again
automatically
Close
all
threads
Close
all
sockets
or
internet
services
Call
garbage
collector
Switch
off
modem
using
the
AT^SMSO
command
Note:
the
VEXT
voltage
will
be
only
present
when
external
power
is
applied
(i.e.
charging
battery)
When
the
battery
is
attached,
as
“automatic
restart”
is
featured
by
default,
the
modem
will
always
be
powered
on
and
cannot
be
switched
off.
If
you
need
to
stop
the
Java
application
when
Automatic
Restart
is
enabled,
you
should
press
the
switch
button
located
near
the
SIM
holder
as
shown
in
the
picture
below.
