This optional lithium battery enables portable cooling and freezing functions for Steamy-E compressor coolers without a power connection. With a capacity of 15,600 mAh, it provides a runtime of 4 to 24 hours depending on usage intensity and environmental conditions. The battery is specifically designed for the Steamy-E compressor cooler models SECTA, SECTAW, and SECTW, ensuring optimal compatibility and performance. The robust housing made of black plastic offers reliable energy storage in a compact, lightweight profile. Ideal for road trips, camping excursions, and marine applications, it transforms standard coolers into fully portable cooling units. The lithium-ion technology delivers stable energy with constant voltage throughout the discharge cycle and supports both cooling and freezing modes as needed. Easy to transport and store, the battery features a durable design that withstands typical travel impacts and environmental influences. The simple connection with compatible Steamy-E coolers via standard power ports allows for immediate activation of cooling functions. The energy-efficient design maximizes runtime while maintaining consistent compressor performance. This accessory significantly enhances the versatility of Steamy-E cooling systems, providing true off-grid cooling capacity for extended periods without access to mains power or vehicle power.