Blockchain has been widely adopted across numerous industries and applications to improve privacy and security factors. However, with the rapid expansion of this technology, its significant energy consumption has become a growing concern, particularly in mobile cryptographic applications. Traditional consensus mechanisms, such as Proof-of-Work (PoW), require substantial computational power, making them unsuitable for mobile environments. This paper reviews innovative blockchain protocols that prioritize energy efficiency while ensuring security and decentralization. By analyzing alternative consensus mechanisms including Proof-of-Stake (PoS), Delegated Proof-of-Stake (DPoS) and energy optimization strategies, we assess their effectiveness in lowering power consumption. The study highlights the role of sustainable blockchain approaches in enhancing mobile application efficiency with minimized environmental impact. This will help in increasing the energy efficiency and understanding the impact and applicability of blockchain by switching to greener systems.