An easy 12V lithium solution.  These batteries have a clever BMS (Battery Management System) that allows 2 batteries to be run in parallel; and for up to 4 batteries to be run in series to make 24V and 48V banks.

Features

• Using the technology of lithium iron phosphate cells this battery has superior safety, lasts for thousands of cycles, and can be run to 100% DOD (Depth of Discharge) under normal conditions.
• Has built in automatic protection for over charging, over discharging, high current and high temperature.
• Free of maintenance.
• Internal cell balancing.
• Lighter weight: About 40% - 50% of the weight of a comparable lead acid battery.
• Can be charged using most standard lead acid charges (set).
• Opperates in wide temperature range: -20℃ to 60℃
• Support for Series application expansion (up to 51.2V) and two in parallel.
• 5 years Warranty

Applications

• UPS
• Solar & Wind Power System
• Golf Cart
• Electric Vehicle, E-bike, E-rickshaw etc.
• Lighting

You could consider using these battery terminal clamps on this battery https://www.bimblesolar.com/battery-terminals-m8-pair