I am about to install TravelVolts' dc-dc (CTEK 250). The leisure battery has arrived first. My query is, I assume it was sent uncharged (no i haven't checked, its still in its box). Should I charge it in preparation? If so I assume I can use a normal battery charger. Low or High? Plus I have a dual optimal v which trickle charges both my ducati's, can I use this? Battery = Expedition 105. Thanks 