Parents warned over dangerous battery mistake we all make

Duracell advises replacing all batteries in the same device with new ones at the same time (Photo: Shutterstock)

Many parents will be stocking up on batteries during the festive period to ensure their little ones can get full enjoyment out of the new toys Santa brought on Christmas morning.

It's wise to stock up on some spares and some may even dig out some older batteries when the first wave are inevitably drained - but experts have warned of a very common and little-known danger that can come with it.