I have been using X-Note 7 for a few weeks now in SLOT-1. This rom has solved my battery drain problems. All of the AT&T based ROMs will generate diagnostics.client.wakelocks. Apparently, apps like Active Apps widget cause these wakelocks. However, when installed on X-Note 7, Active Apps does not cause these wakelocks at all. The wakelocks were causing severe battery drain of 5 to 10 percent per hour.
Now with X-Note 7, I get an idle battery drain of 0.3 percent per hour. With a Pocket Bible reader program, I can get a screen time of up to 24 hours reading the Bible per charge. It uses a white text on black display. This is the very best ROM for battery life that I have installed.
Thanks to the OP.