Batteries in portable electrical or electronic devices are charged, through by a wireless battery charger, having an intermediate electrical energy storage device that is charged from a non-power line connected source, and discharged to recharge the battery of a portable device placed into a charge port of the wireless battery charger. The granulated monocalcium phosphate composition includes one or more additives such as lubricity and abrasivity additives. The second draw can be always offered or triggered upon predefined conditions. The moving positions of the tracking points are estimated and the positions are sequentially tracked. Feedback information is produced based on the SNR and transmitted from the terminal.