Canadair Challenger for APU Starter Battery

For most business jets including the Canadair Challenger, the battery voltage should generally be at or above the aircraft manufacturer's minimum threshold — typically around 22–24V for a 24V nickel-cadmium system — before attempting an APU start. A battery below minimum voltage may not sustain the high current draw of the APU starter, resulting in a failed or aborted start sequence.

The APU receives its starting power from the aircraft's dedicated APU starter battery or main battery bus, depending on aircraft configuration. On the Canadair CL600 Challenger, nickel-cadmium batteries are the standard chemistry used. Once the APU is running, it generates its own electrical power and can recharge the battery and supply other aircraft systems.

The Canadair CL600 Challenger is compatible with nickel-cadmium batteries from manufacturers including SAFT, Marathon, and Varta. Ni-Cad Systems, Inc. supplies FAA-PMA approved replacement battery packs supporting these NiCd chemistries, as well as lead-acid variants including Concorde and Gill (Teledyne) for applicable configurations.

Yes. All replacement battery packs for the Canadair CL600 Challenger offered by Ni-Cad Systems, Inc. are FAA-PMA approved second-source products. The company also operates a Part 145 FAA approved repair facility, ensuring all servicing, capacity testing, and deep-cycling activities comply with aviation safety standards.

Ni-Cad Systems, Inc. offers fast turnaround times and maintains rental batteries for immediate AOG needs. If your aircraft is grounded, contact the 24/7 AOG support line at +1 510 501-9391. Rental units can bridge the gap while your battery is being serviced or a replacement is shipped.

In addition to replacement battery pack sales, Ni-Cad Systems, Inc. offers capacity testing, deep-cycling, battery storage services, and 24/7 technical support. These services cover both nickel-cadmium and lead-acid battery types, ensuring your Challenger's APU and emergency power systems remain airworthy and compliant.