Convert your 12V battery into a portable power source with The Ark Powerpack 2. It is an ideal portable power source when 4WDing, camping, boating or caravanning. It features an easy to monitor power level and extends the life of your battery without over charging. In addition, the Powerpack 2 is capable of accepting charge from solar panels and vehicle alternators. The Ark Powerpak 12V Battery Box has a 6 stage smart charger to maintain battery condition. Now includes a IN-CAR DC - DC car charger and two USB sockets to charge your electronic devices on the go!