Battery Tender® Quick Disconnect OBDII Adapter Classic Cars Featured Products offsetting the battery's natural self-discharge

offsetting the battery's natural self-discharge rate and holding it at peak voltage indefinitely — without overcharging

EXTENDED BATTERY LIFE The Battery Tender® Junior is an automatic battery charger

While compact in size

professional installation option for garages

Battery Tender® Quick Disconnect OBDII Adapter Classic Cars Featured Products offsetting the battery's natural self-dischargeThe Battery Tender OBDII Adapter connects a Battery Tender charger directly to a vehicle's OBDII diagnostic port located under the dashboard on all vehicles manufactured after 1996 eliminating the need to open the hood or access the battery directly. Plug the adapter into the OBDII port, connect the charger, and maintain the battery through the vehicle's wiring without touching the battery terminals. How It Works Modern vehicles draw a small