By Antony Clements-Thrower A mum whose vape battery exploded in her pocket feared she was about to burn to death when her jacket went up in flames. Leeanne Anderson was visiting her sister following wrist surgery when she heard a small explosion. To her horror, she realised it came from her jacket pocket and she was quickly engulfed by flames between her knee and shoulder. The 43-year-old says her puffer gilet “melted off” as her sister Elizabeth and brother-in-law Alan Parker worked to put out the fire. Leeanne, from Camberley, Surrey, said her whole leg was ‘completely charred’ as well as su…