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Battery Life (Joule) 20 hours approx. Hub battery type: two AA type 1.5 volt Joule battery type: rechargeable Freehub fixing bolt torque 300 inch-lbs. 13 Chapter 8: Radio Fre que ncy (RF) inter fere nce Radio frequency (RF) interference with other devices may cause intermittent loss of information. Wireless Internet access points, microwaves, cordless phones, or other wireless devices may cause frequency interference. To mitigate the chance of interference, set wireless access points to the lowe