A mother from Leicestershire whose daughter had a button battery stuck up her nose for three months has issued a warning about the dangers.
Kerrie Heath's adopted daughter, Kelsie, was just three years old when it happened.
The battery went unnoticed until it was discovered through an X-ray.
Button batteries can react will saliva - which leads them to act like acid and eat through flesh.
If swallowed by a child, it can burn through their oesophagus in just 2 hours.
The damage can be so significant it can cause death.
Now aged 8, Kelsie needs surgery to begin the rebuilding of her nose - she'll then have to continue to have a number of operations as she grows.