The Stratos E-Foil Battery 2.1 is built to keep riders on the water longer with dependable power and seamless performance. Designed as the official replacement or backup option, it delivers consistent output for extended riding sessions without interruption. Advanced lithium-ion technology provides smooth power delivery while supporting up to ninety minutes of ride time depending on conditions. A smart internal management system helps protect the battery during every charge and ride, offering peace of mind in demanding marine environments. The rugged waterproof housing is made to handle repeated exposure to water while maintaining reliability. With fast recharge capability and simple installation, the Stratos E-Foil Battery makes it easy to maximize every session.