Warning! At sub-zero temperatures, the electrolyte in a completely discharged battery can freeze, turning into ice. In this case, do not start the engine from an external power source, as this may cause the battery to explode. It is necessary to preheat the battery in a warm room.
This type of work is only performed if the engine cannot be started due to a discharged battery and there is no opportunity or time to charge it.
Warning! Use connecting wires of appropriate cross-section with insulated clamps.
Warning! To avoid accidentally connecting the positive terminal of the additional current source to the negative terminal of the battery and vice versa, it is better that the wires are of different colors.
We connect one end of the red wire to the positive terminal of the additional current source...
...and the second one to the positive terminal of the car battery. To do this, remove the protective cover from the terminal.
First, connect the black wire to the negative terminal of the additional current source, and then to the eye of the engine being started.
Note: Do not connect the cable to the negative terminal of the battery, since a dead battery will draw most of the current.
Warning: Before starting the engine, make sure that the wires do not touch any moving parts of the engine.
Recommendation. If a battery pack on another vehicle is used as an additional power source, you must start the vehicle and allow it to operate at an increased crankshaft speed. After this, you can try to start the engine.
[Full article on the website LADAMAN.RU]
If a starting device is used as an additional power source, then before attempting to start it, it is necessary to turn it on and wait for some time so that the battery at least recharges a little.
Before disconnecting the wires, let the engine run for at least three minutes. We disconnect the wires in the reverse order of connection.
Warning: When disconnecting the wires, the headlights must be turned off, as a power surge can cause the bulbs to burn out.
Recommendation. It is necessary to take into account that during a short trip the battery will not have time to charge. After arriving at the parking place, check the charge of the battery and charge it if necessary (see "Battery - charging").