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Manual Number 9019286 • Revision E, January 06, 2022
Manual Capacity Check
If there is any reason to suspect the accuracy of the reported capacity, a manually
measured capacity check can be performed.
A. Ensure that the unit is charged per Section 5.4.2.
B. Apply a constant current load of 20A to discharge the battery pack. (Capacity
check should be conducted at 23°C ±3°C (68-79°F) for best results.)
C. Monitor the time (in minutes and seconds) from initially applying the constant
current load in Step B until the unit the battery is nearly depleted and turns off
the power output/stops discharging.
D. Calculate the capacity in amp-hours (Ah):
Discharge time (in hours) = discharge minutes / 60
Capacity (Ah) = (amps) x (hours) = (20 amps) x (Discharge time)
Return to Service
A. Recharge the unit per Section 5.4.2.
B. Measure and verify that the voltage on the unit’s power terminals is greater than 27.6
VDC. A unit should never be returned to service if the voltage is less than this value after
charging.
C. Re-install the unit in the aircraft, including securing it via proper hold-downs, mating the
electrical connections, and verifying proper vent attachment.
D. Record service action in aircraft log book.
Return to Service
In accordance with IATA and per UN 3480, Pl 965, Sections 1A and 1B, when shipped by air
the True blue Power Advanced Lithium-ion Battery must be shipped with a state of charge
(SOC) not to exceed 30% of rated capacity.
A. To prepare the battery for shipment, refer to the Advanced Lithium-ion Battery Support
Guide (located at
www.truebluepowerusa.com
), which includes a Shipping Preparation
Guide.
5.5 COMPONENT SERVICE
The cells, electronics, and other components that comprise the TB20 Advanced Lithium-ion
Battery are not user serviceable or replaceable items. Therefore, data is not available from the
manufacturer to conduct field service. If the product requires service, please contact the
manufacturer.
Summary of Contents for True Blue Power TB20 Series
Page 1: ...Revision E January 6 2022...
