By Jeremy Wagstaff and Noel Randewich SINGAPORE/SAN FRANCISCO (Reuters) – Apple Incs embrace of wireless charging for its new Watch may be a defining moment for a technology thats languished for years amid competing standards and consumer confusion. History will tell you its what it takes to get mainstream lift-off, said Intels Leighton Phillips. Among the competing standards, A4WP uses something called magnetic resonance, while the Wireless Power Consortium (WPC) – which includes tech names such as Nokia and Philips – champions its Qi standard using inductive charging, a method which is also used by the Power Matters Alliance (PMA).