Google Wallet is responsible for 55-65% of the battery usage on my Nexus S and I don't even have NFC turned on. I do not use GW nor do I ever plan on using GW but it starts up every time I power on my Nexus S. It starts itself up again after killing it the first time but if I kill it a second time, it does seem to stay dead, at least until the next power off/on cycle. What is this energy hog doing and how can I get rid of it permanently?