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91085700 (17th to 20th octets) → tag's uptime in seconds = 5703825 s. 0x91085700 is in little-endian, so just swap the octets to 0x00570891 and the result is 5703825 in decimal. That is 1584.395833 hours or66-day uptime.
00(21st octet) → trigger (flag) that sent the payload. If it is "00" it means that no trigger was detected and that it is just a periodically broadcasted payload (based on the advertisement interval configured for the tag). If the value would be "04" it would mean that the device was dropped (freefalling triggered). You can find more information on the "flags" and the "Secret" section above in the packet structure section.
5f (22nd octet) → battery percentage of the tag = 95 %. 0x5f from hex to dec is95.
iBeacon packet structure
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