What type of battery is installed?

• A. Nickel Cadmium
• B. Lithium Ion
• C. Lead Acid
• D. Nickel Metal Hydride

Answer: (A)

The main idea is that aircraft batteries are chosen for reliability under load, temperature range, and quick recharge capability. Nickel Cadmium batteries are favored in aviation because they can deliver high current surges needed for engine starts and avionics, work well across a wide temperature range, and have a long cycle life with robust tolerance to frequent charging and discharging. They’re also less sensitive to aging effects that can plague other chemistries in aircraft use.

Lithium-ion offers high energy density but has higher safety and certification considerations for aviation, especially in older or proven-aircraft systems. Lead-acid is heavier and generates less favorable high-current performance for starting and frequent cycling. Nickel Metal Hydride has better energy density than NiCd but doesn’t match NiCd’s capability for rapid high-current bursts and rugged reliability in aerospace contexts.

So, the installed battery is Nickel Cadmium because it best meets the need for reliable high-current starts and stable performance across the wide operating conditions typical of aviation.