Powerful and Lightweight Design: Weighing just 1lb, MMG's lithium-ion battery is 50-70% lighter than standard alternatives, delivering exceptional cranking power in a compact 4.49" x 2.80" x 3.39" package. Unrivaled Longevity: Over 2000 charging cycles and a shelf life of up to 1 year before recharging, the MMG battery ensures long-lasting performance with minimal maintenance, backed by the testimony of satisfied customers. Eco-Conscious Innovation: Free from hazardous acid or heavy metals, MMG's battery is non-explosive, non-combustible, and environmentally friendly. Choose a power solution that prioritizes sustainability without compromising performance. Smart Battery Management: Our lithium-ion battery provides an immediate and stronger startup, longer discharge cycles, and excellent power. The charge status indicator ensures you're always in the know. Versatile Fitment, Trusted by Enthusiasts: MMG's lithium-ion battery seamlessly replaces a range of models, including BTZ4L-BS, BTZ5S, BTZ5L-BS, BTZ7S, BTZ7L-BS, BTZ8V, YTX4L-BS, YTZ5S-BS, YTX5L-BS, YTZ7S, YTZ7L-BS, and YTZ8V. MMG Lithium-Ion Battery: Extremely LIGHTWEIGHT, 50% to 70% lighter than standard batteries.