Battery in Supercharged XF
#1
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This is just an FYI from a personal experience. Don't be like me and not read the owner's manual section on a dead battery. I learned that the glove box will not open if the battery is dead and could not access the manual. Know how to unlock the trunk with the key that's hidden in the fob.
If you have an XF Supercharged your battery is the same size as the battery in a Ford F350 Super Duty. You cannot jump start these batteries with a portable jumper cable box. AAA tried to jump start mine that way, it failed, and they left. Luckily Jaguar Road Assistance showed up and knew the drill.
If you have an XF Supercharged your battery is the same size as the battery in a Ford F350 Super Duty. You cannot jump start these batteries with a portable jumper cable box. AAA tried to jump start mine that way, it failed, and they left. Luckily Jaguar Road Assistance showed up and knew the drill.
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That's a good practice with any charge source. It refreshes the dead battery a bit so that the start is not solely dependent on current flowing through iffy clamps. If the clamps are really bad but still passing current, it is possible to jump start from a running vehicle by letting the flat battery charge from the higher voltage available because the donor vehicle is running.
#7
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Never had to do this. Started dead cars in minus 35C with no delay at all. If the car battery is dead because it is not accepting a charge then waiting will just be hard on the donor car's alternator to no purpose. In that case one should start the car and drive it only to the battery replacement shop. Weak batteries kill voltage regulators quickly.
If the car battery is not dead but just insufficiently charged you won't need to wait. If the engine will crank it will start, eventually. Far more important than actual battery charge is the ability to crank for long enough to generate compression heat when starting a cold engine.
If the car battery is not dead but just insufficiently charged you won't need to wait. If the engine will crank it will start, eventually. Far more important than actual battery charge is the ability to crank for long enough to generate compression heat when starting a cold engine.
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