Some people would naturally react by trying to put out a small fire, however when it comes to Lithium-Ion battery fires it is recommended that (if possible) you allow a battery pack to burn itself out until the device has been fully consumed, to be sure that there is no risk of re-ignition. Please note that this should only be done in a safe environment, as the smoke from a burning Lithium-Ion battery is often corrosive and dangerous to your health.
If it is not possible to let the battery pack burn until fully consumed, the current recommended action from fire brigades is to extinguish the fire (removal of flames) as shown at the end of the video. This means moving the battery outside as soon as possible. If you do not have a shovel at hand, you could use a fire blanket, fit for this purpose.
Submerge the burning battery in water
The successful method of extinguishing a Lithium-Ion battery fire, is to drop the entire battery into water. However, it is important to note that this could also result in toxic consequences. The water in which the battery is placed will become severely polluted, which makes it vital to carefully select where you will place the burning device. If possible, place the battery in a container with water, rather than a river, pond, or nearby anybody to avoid a threat to people and the environment.
We strongly recommend not to create any similar fire tests of Lithium-Ion batteries, due to the extremely unpredictable nature of such fires and high hazard for personnel and environment