So, during the summer I rode the sling several days a week, so didn't bother with the tender. Toward the end of the summer I added a Neutrino Aurora to power my curb alert and heated gear. Recently, I added a Pedal Commander, a Digital Guard Dawg and a USB charger with a built in voltmeter. So that is the sum total of electrically interfacing accessories on my sling. The first time I powered up the USB charger with the voltmeter I noticed it was only showing 11 and some change. I started the sling and it went up to nearly 14v, so I knew the charging system was working. I figured since the weather had cooled off and I wasn't riding as much, it just need to be on the tender more often. Since then it's been on the tender pretty much whenever I'm not riding it. BTW, the tender is the BatteryMinder 2012-AGM. The one the sling owners manual recommends. So fast forward to last weekend. I've had an ongoing issue with the Bluetooth in the Neutrino. Half the time my phone won't connect to it. I've been working with their tech support for some time on it. Last weekend they asked me to ship it back to them. I took the sling off the tender and removed the Neutrino. I reinstalled the FZ1 fuseblock I had been using before. The only thing I connected to it was the curb alert. I left the heated gear plugs and USB charger disconnected. This evening I realized I never put it back on the tender. So it's been off the tender and has not been started or ridden for a week. I plug in the tender. The "Weak Battery" light on the tender comes on and the led under the completely empty battery icon is lit. I unplug the tender, take the battery cover off and put a meter on it. 5.6V. Yikes! So now I'm waiting for the tender to (hopefully) get it back to 12.x volts. My next step is going to be to put an ammeter inline at the battery and see what the key-off current draw is. Anyone know whats "normal"? I assume less than a couple hundred milliamps, max. Anyone ever heard of a curb alert or digital guard dawg killing a battery in a week? I can't imagine how the pedal commander could be the issue, but I guess it's possible if the pedal position sensor has power all the time. Those are the only accessories installed right now. If it's not one of then, then I guess it's off to the dealer..