Disadvantages
Lower efficiency, waste heat - The main disadvantages of inductive charging are its lower efficiency and increased resistive heating in comparison to direct contact. Implementations using lower frequencies or older drive technologies charge more slowly and generate heat within most portable electronics.
Slower charging - due to the lower efficiency, devices can take longer to charge when supplied power is equal.
More expensive - Inductive charging also requires drive electronics and coils in both device and charger, increasing the complexity and cost of manufacturing.
Inconvenience - When a mobile device is connected to a cable, it can be moved around within the limits of the cable and freely operated while charging. In current implementations of inductive charging (such as the Qi standard), the mobile device must be left on a pad, and thus can't be moved around or easily operated while charging.