Replacement mobile phone batteries that modify the potentially harmful electromagnetic field emissions rendering them harmless A Noise Field Technology NFT superimposes a low frequency randomised magnetic field over the electromagnetic field emissions Masks any regular pattern proven to cause biological effects The resulting irregular wave patterns are harmless & avoid the potentially harmful biological impact Naturally occurring electromagnetic radiation generally occurs at low levels in random patterns that are harmless to humans. However the electromagnetic fields from artificial sources such as electronic devices like mobile phones usually follow a regular pattern & there is strong evidence that such waves can have a biological impact on humans. Whether these effects are harmless or not is still the subject of debate & concern within the scientific & medical communities & wider public. Exradias Wi-Guardand 153 technology is available across a range of handset batteries