Charge on the go with a Bakcou DC Battery Charger. This charger allows you to charge your electric bike batteries through the DC outlet in your vehicle. Now your electric bike batteries can always be charged when you&';re out on your trip! DC Battery Charger 12V DC Input 48V Output This charger comes with the barrel plug that is pictured. If your Bakcou battery needs the V1 or the V2 (pictured) please reach out to our customer service and we will make sure to send you the needed pigtail adapter.