Tusk Tec-Core Batteries are premium quality batteries designed to meet the high demands of the power-sports industry. The Tusk Tec-Core Batteries comes complete with a pre-measured electrolyte (acid) pack that makes filling the battery simple and accurate, while the Maintenance-Free Gel batteries come pre filled (always refer to safety instructions and wear safety glasses when filling any battery). When it comes to quality ATV, UTV, and motorcycle batteries, think Tusk Tec-Core Batteries. Every Tusk Tec-Core battery comes with a 6 month warranty. -Maintenance-free means you never need to check fluid levels or add water. -Complete with acid pack that makes filling simple and accurate.