Power, capacity & life, and light weight. Lithium-ion batteries far exceed lead batteries in all performance aspects required of a car battery. The effects of next-generation battery tuning are beyond imagination, including improved engine starting and fuel economy, as well as improved audio sound and driving performance. Mega Life batteries, which are equipped with an emergency system (emergency spare battery system), also eliminate the trouble of running out of battery power.
It is introduced on Ameblo's "M&M HONDA's Honda Honki."
https://ameblo.jp/mandm-honda/entry-12815828352.html
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Five achievement standards for MEGA•LiFe batteries: "5S"
■Safety
IBMS monitors and protects all parameters during charging and discharging, including voltage, current, internal temperature, and ambient temperature. Proprietary casing system ensures waterproofing to 3 meters (IPX8) and impact resistance to 10 meters drop test.
■Save Energy – Energy-saving With an astonishing natural discharge rate (1% to 5% per year), the vehicle battery does not run out even if it is left unused for a long time. Stable discharge power improves engine performance and audio quality.
■Smart – In the unlikely event that the battery runs out, you can press the rescue button (separate circuit spare battery start button) on the main unit to start the engine using the built-in spare battery on a separate circuit.
■Satisfaction – Full replacement guarantee for 3 years from the date of sale Maintenance-free, battery life of 5 to 10 years Wide variety of sizes and specifications available for easy installation on most domestic cars and imported cars from Europe and the United States, including 17 types for automobiles and 25 types for motorcycles.
■Sustainability – Compliant with environmental protection standards such as RoHS, and free of lead contamination and acid corrosion