The Multi-functional battery charger can cater to the CAR socket power and Solar charger back-up power. When you have the full package of our product, you may not worry about your mobile phone out of power at any time and any place. You can get continuous power to your mobile phone when you are at home, driving on the road, traveling for business or camping with your friends far in mountain area. You will get released from taking redundant various model/brand chargers. Everyone in a family/company/ traveling group can share one same charger.