Small 2kWh portable rechargeable power supply is used to temporary electricity to variuos power tools. It is used for professional applications, providing a power socket without constraints, wherever it is required. These power supplis can provide 3.6 kW output power and it can be fully charged witghin 3 hours. The biggest benefits of portable rechargeable power supply are cost effective (no fuel is needed like in portable generators), lightweight, robust, powerful, silent.