With the advancement in technology, growing size of the aircraft fleet and introduction of aircrafts like MRJ and C919 and ever increasing production costs for existing aircrafts such as B737, B787, A320, and A350XWB, the aerospace and defense battery market is predicted to reach US$211.8 million, these factors are proving to be the driving forces in increasing use of lithium ion batteries in aircrafts and defense equipments.

Batteries are used prominently for power backup and emergency systems, starting the engine and auxiliary power units, and flight preparation in the aerospace & defense industry. They play a very crucial role as they supply power to the aircraft in the case of power failure.

Batteries in the aircraft must be reliable, durable, lower in maintenance, low weight, lower in the cost of ownership, and have an extended life. That's where lithium ion batteries come into play providing efficient performance and reliability. The industry is witnessing a gradual transition from the nickel-cadmium and lead-acid batteries to lithium-ion batteries.