27 Battery, Starter, Generator, Cruise Control: Battery: Quick-charging

WARNING: This page does not describe the selected car, but rather 16 other vehicles, including the 2009 Audi S4, 2009 Audi A4, 2008 Audi S4, 2008 Audi RS 4, and 2008 Audi A4. However, it is still accessible from the selected car via links, so may be relevant.

CAUTION:

Prior to handling or servicing batteries, read, understand and observe the Warning and Safety Measures for lead-acid batteries Smoking, naked flames, fires and sparks: .
Always wear suitable protective clothing Eye protection and protective clothing: .

Danger of explosion!

Batteries produce explosive gasses while being charged.
Keep open flames and sparks away and DO NOT smoke near batteries.
The battery charger MUST be turned off when connecting or disconnecting the cables at the battery.
Battery cell caps must NOT be removed while charging.

"Boosting" a sulfated battery a high charging rate can cause an explosion.
Ensure that battery is charged in a well ventilated area.
Precision tools must not be kept in the same room where batteries are being charged. Tools may corrode due to chemical reaction.

CAUTION:

Battery must not be connected to vehicle electrical system when quick charging. Where applicable, disconnect battery in engine compartment → Battery in engine compartment, disconnecting and reconnecting . Where applicable, disconnect battery in luggage compartment → Battery in luggage compartment, disconnecting and connecting .
Never quick-charge a totally discharged battery. Effective charging will not take place.

NOTE:

The battery temperature must be at least 10 ° C.
Quick-charging of batteries should only be performed in exceptional circumstances (e.g. boost starting) as rapid charging may cause damage.