The link no longer works, but I have the same problem (12% drain per hour in watch mode).
You are not alone. Same problem: 6,6% drain per hour. One small activity, bluetooth off. Fully loaded at 6.00 AM and now i have 18%. I have make a factory reset...no effect. I have uninstalled all IQ Apps (only Battery Gauge is installed) an make a factory reset.... nothing. All on the watch is default.
The link is dead.
For the past 2 days, i have been experiencing rapid battery drain. On Sunday, I charged my watch fully the night before at about 11 pm. By 8 pm the following day, I have to plug it in with only 16% remaining (~4%/h). I only used the watch for 1 hour of activity tracking (non-GPS mode). Backlight is kept to 10% and is only on for very short basis. I do not have notifications turned on. Have rebooted but to no effect.
The battery drain is now accelerating to about 5%/h.
Please fix this issue.