The Yuasa EPY Y6-340 LN0 (also known as the Y6-340LN0) is a specialized Maintenance-Free (MF) battery manufactured in Japan. For 2026, it is primarily recognized as a high-performance battery designed for modern hybrid vehicles and compact European/Japanese cars that utilize the compact LN0 DIN housing.

It is a critical component for the 12V ancillary systems in cars where space is at a premium, such as the Toyota Yaris Hybrid (2020+), Toyota Sienta Hybrid, Honda Fit/Jazz Hybrid, and certain compact BMW or Mini models.