My child's watch has been overheating and also the battery not lasting. The Battery says 100% but it turns off sometimes after a few hours or inmediatelly. I found a solution for this and it is very simple. The watches have to use a charging brick with Output 5V/1A. This resolved all these issues. I advise all parents with the same issue to try using the correct charging brick. Gabb only provides the charging cable but sometimes we want to use a fast charger and this does not work for this type of watches. I hope Gabb comes up with a better watch that allows fast chargers.