REV 1.6
© 2019 TCW Technologies, LLC.
6
Battery Capacity:
The IBBS provides an energy capacity of 6 amp-hours at 12.8 volts when the system is fully
charged and operated at 25 C°. Depending on various conditions including operating and
storage temperature and age of the battery pack, the capacity of the system will vary. With a
fully charged battery, the following average performance can be expected in terms of
operating duration. The operating duration is for output voltage down to 10.0 volts.
Nominal Current Draw
Duration
total connected load
1.5 amps
240 minutes
3.0 amps
110 minutes
6.0 amps
55 minutes
The internal battery in the IBBS system is replaceable, however, the IBBS product must be
returned to TCW Technologies, LLC. for this service. Battery life depends strongly on many
factors including operating and storage temperature, number of discharge cycles and depth
of discharge. The battery capacity should be checked at least annually for suitable back-up
power operation of the connected equipment. When the battery capacity no longer meets
the operating criteria of the aircraft it must be replaced. Contact TCW Technologies, LLC.
for battery replacement.
Storage beyond 9 months:
If the IBBS unit is to be stored without connection to the aircraft for a period greater than 9
months it must be connected to a source of DC power to maintain the battery’s charge. Only
connections to the ground terminal and the main power terminal are required. Connect Pin
5 (main power) and Pin 9 (ground) of the IBBS to any source of regulated DC power at 12-15
volts with a current capability of > 4.0 amps to accomplish full recharging. Charger model
IBBS-12v-CHARGER-Li-Fe is available from TCW Technologies, LLC. to simplify this
requirement, it has the mating connector installed.
Upon completion of installation:
1) The builder/operator is responsible for determining the minimum operating duration of the
back-up enabled equipment.
2) The required back-up operating time for the connected equipment should be recorded in
the aircraft log-book with follow-up entries confirming the annual testing results that
indicate that the required operating time is satisfied.
