Sennheiser SYSTEM 2020 Instructions For Use Manual page 32

Using the components
30
Charging the BA 2015 accupack
To charge the accupack of the wireless microphone or
bodypack transmitter:
Remove the accupack, as described on page 23 or
page 24.
Place the accupack into the charging compartment
for the accupack/bodypack transmitter
shown in the diagram on the left.
The red LED CHARGE/ERROR
compartment lights up.
When the accupack is fully charged, the green
READY lights up.
Notes:
Charging a completely discharged accupack takes
approx. 3½ hours at room temperature. It is
normal for the accupacks to get hot during
charging.
However, the charging process may take longer
if:
– the accupack is deep-discharged and first has
to be reconditioned by a deep discharge
recovery charge,
– the ambient temperature is close to or over
40°C, since, in order to protect the accupack, the
charging process will be interrupted until the
temperature has dropped to a safe level.
For safety reasons, each charging process will be
interrupted after 4 hours.
When not using the BA 2015 accupack for
extended periods of time, charge it about every
three to six months.
as
of the charging
LED