I did not used my Highlander 2008 for last two months, and the battery dropped. I did a few(3-4) times jump start using those gadgets like power banks and it worked. But because I didn't use the car after jump start( only I started it for little movements in parking) the battery didn't get charged.
Last time I jump started the car again and it started harder and a little horn sound came when I put the switch in ON position. Then I used the car about 1-2 hours and today I could start the car with no need to jump start and it seems battery has life on it and got charged again.
But the new problem is that I hear a little horn whenever I put the switch in ON position. I don't know what is the problem? Does jump starter damaged the car or caused some fuses to burn?