Just went to start bike and battery was dead after a week of not riding it. I'm charging it. Almost 2 years old. Think it's time for a new one. Anyone have any suggestions where to buy one at a good price, and which one? I've had good luck with Shorai lithium Iron batteries in the past, but it's like 200 bucks for the Strom. I only paid 160 for my Shorai for the ducati.