Once connected via extension leads to the batteries, users can begin the battery maintenance process by plugging their charger to an AC power source. From this point forward, the station or battery that is currently being charged is indicated by a blinking LED light on the QuadLink. Every 10 minutes, the QuadLink will switch to the next battery in line. If there is no battery connected to any given channel, the channel will be skipped after a short qualification process. Note: To charge 6V batteries, a 6V charger must be connected to the QuadLink, likewise with 12V scenarios. Solar chargers, either 6V or 12V can also be used, as long as they do not exceed an 8 Amp output.