A device for wireless power transfer, the device comprising: a power transmitting element configured to use a current at a first level to wirelessly transmit power sufficient to provide power to one or more chargeable devices positioned within a charging region; and a controller operationally coupled to the power transmitting element and configured to: adjust the current to a default level in response to detecting one or more chargeable devices; register the one or more chargeable devices and perform a stepwise downward adjustment to adjust the current to the first level from the default level via one or more additional levels, the first level being lower than the default level, based on the negotiation with the one or more chargeable devices; detect a subsequent chargeable device positioned within the charging region while the current is at the first level; and adjust the current, in response to detecting the subsequent chargeable device, from the first level to the default level prior to communication with the subsequent chargeable device; and adjust the current to a second level different from the default level between the default level and the first level to charge the one or more chargeable devices and the subsequent chargeable device . a power transmitting element configured to use a current at a first level to wirelessly transmit power sufficient to provide power to one or more chargeable devices positioned within a charging region; and a controller operationally coupled to the power transmitting element and configured to: adjust the current to a default level in response to detecting one or more chargeable devices; register the one or more chargeable devices and perform a stepwise downward adjustment to adjust the current to the first level from the default level via one or more additional levels, the first level being lower than the default level, based on the negotiation with the one or more chargeable devices; detect a subsequent chargeable device positioned within the charging region while the current is at the first level; and adjust the current, in response to detecting the subsequent chargeable device, from the first level to the default level prior to communication with the subsequent chargeable device; and adjust the current to a second level different from the default level between the default level and the first level to charge the one or more chargeable devices and the subsequent chargeable device . adjust the current to a default level in response to detecting one or more chargeable devices; register the one or more chargeable devices and perform a stepwise downward adjustment to adjust the current to the first level from the default level via one or more additional levels, the first level being lower than the default level, based on the negotiation with the one or more chargeable devices; detect a subsequent chargeable device positioned within the charging region while the current is at the first level; and adjust the current, in response to detecting the subsequent chargeable device, from the first level to the default level prior to communication with the subsequent chargeable device; and adjust the current to a second level different from the default level between the default level and the first level to charge the one or more chargeable devices and the subsequent chargeable device . <EOS>