... photography, field work, camping, etc. Product Features:1. Using thick aluminum air imitation luggage, reinforced corners with steel plate ... directly connect the battery.3.Built-in two 12V10AH maintenance-free lead-acid batteries and a 12V5A charger. It takes ... , inverters, chargers etc., fixed solid, more convenient for transportation,suitable for field work, outdoor use.6. Exposed recessed control ...