I absolutely love the trifectas. I bought two of the original black ones, and one of the newer as blue. In that time I have lost all 3 to leakage from the cart to inside the battery. I am now using one of the manuals and one of the automatics I bought a while back. I am hoping that sealing the batteries is a possibility in the future? The trifectas are quite expensive to keep replacing, even though I love them deeply. I would love to just have a manual battery, sealed, with the ability to have the same plug in ability that the trifecta does. I greatly dislike having to take off my carts just to recharge.... I looove trifecta!