Tytaneum batteries are an economical option for your battery needs.
Amazon.com: 12 Volt Lithium Motorcycle Battery Powersport Battery LiFePO4 Engine Start Battery, Lightweight, High Energy Density, Long Life Cycle, with BMS YTX7L-BS : Automotive
EverStart AGM PowerSport Battery, Group Size 20LBS 12 Volt, 270 CCA - Walmart.com