FORD 2011 F-150 v.3 - Manual (Page 385)

If the battery has been disconnected or a new battery has been installed,
the clock and radio settings must be reset once the battery is
reconnected.
• Always dispose of automotive
batteries in a responsible manner.
Follow your local authorized
standards for disposal. Call your
local authorized recycling center
to find out more about recycling
automotive batteries.
Battery management system (if equipped)
The battery management system (BMS) monitors battery conditions and
takes actions to extend battery life. If excessive battery drain is
detected, the system may temporarily disable certain electrical features
to protect the battery. Those electrical accessories affected include the
rear defrost, heated/cooled seats, climate control fan, heated steering
wheel, audio and navigation system. A message may be displayed on the
instrument cluster or center stack display to alert the driver that battery
protection actions are active. See the Message center in the Instrument
Cluster chapter and Entertainment Systems chapter for more
information. These messages are only for notification that an action is
taking place, and not intended to indicate an electrical problem or that
the battery requires replacement.
Electrical accessory installation
To ensure proper operation of the BMS, any electrical devices that are
added to the vehicle should not have their ground connection made
directly at the negative battery post. A connection at the negative
battery post can cause inaccurate measurements of the battery condition
and potential incorrect system operation.
Note: Electrical or electronic accessories added to the vehicle by the
dealer or the owner may adversely affect battery performance and
durability, and may also affect the performance of other electrical
systems in the vehicle.
When a battery replacement is required, the battery should only be
replaced with a Ford recommended replacement battery which matches
the electrical requirements of the vehicle. After battery replacement, or
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Maintenance and Specifications
385
2011 F-150 (f12)
Owners Guide, 3rd Printing
USA (fus)