Very dangerous !!! I bought two, received quickly, I used them during the day ans in the evening I wanred to charge them (one of them discharged very quickly, in like 5 minutes). I barely put them on charge when I smell it burning, smoke comes out of a horn, I unplug them quickly otherwise it would have caught fire !!! I would like to be reimbursed for both horns because I Will never use them again !!