Power optimization of Eddystone example is now complete, and the update package can be found at https://ruu.vi/setup/packages/20170118-eddystone.zip.
On default settings the passcode is 00112233445566778899aabbccddeeff. Nordic smartphone app “nRF Beacon for Eddystone” accepts the pass code as-is, web configuration tool expects prefix “0x” to signal that passcode is a hex number while Nordic app does not accept the prefix. Updating the firmware does not reset the password or settings if you have already configured something else.
On default setting of broadcasting URL https://ruu.vi/setup at 1 Hz @ 0 dBm the average current consumption is ~10 µA (measured with Nordic Power Profiler Kit). A CR2450 battery with 600 mAh of capacity (similar to ones shipped in KS campaign devices) should last teoretically for ~60 000 hours or ~6 years +, practical lifetime will be less due to battery aging and characteristics degrading over use.