I recently purchased a galaxy s3 lte with the extended 3000mah battery. I have found the battery drain to be unusually high. it is draining at around 3% an hour. I am on the sentinel ROM. I changed to the normal slim battery and it also seemed to be draining at a similar rate.
Ok...I might be a tad presumptuous here, but Samsung sent through an update today to an App called "Samsung Push Service" which noted it fixed "power consumption" issues. Jerry referenced it in an earlier article saying his initial indications were that it may have fixed the WiFi drain, so I immediately updated the App: