Does your voltmeter needle drop significanlty while you are trimming? I bought my boat used so don't know the history of the battery but it looks pretty new and I have had zero issues with it... acts like brand new but I can't help but notice the voltmeter drops a lot when you are trimming. I understand that is probably the highest draw item on the boat and it really doesn't matter if that is normal for Bennington Ops but I have not seen that on other boats I've owned.