I am looking to buy a 2nd hand 2013/2014 GS in the next few day but am concerned that the battery might not hold a charge for long, especially if there is an alarm fitted. I had a 2004 GS that lost its charge within days and had to live on an optimate. I can't use a trickle charger as the lead isn't long enough to reach from my 5th floor flat. I know that riding it is the ideal answer, but even as a retired gentleman of leisure living on the Costa del Sol that isn't always possible. I will have the alarm removed if necessary, which might help. Any thoughts?