I'm now on my 3rd battery for 2010 RT-S, seems 2+ is about as good as it's going to get, but what does suprize me is the short term... if I happen to forget to put it on the tender it's dead in a weeks time, a quick overnight charge brings it back to life, but is this normal? I keep bringing this to the attention of my service tech at dealership and all he says is "there's a lot of stuff going on in the background pulling power... keep it on a tender"