This slide shows a functional block diagram of a wireless battery charging system, which thereby eliminates charging contacts. The LTC4123 combines a wireless power receiver with a linear NiMH, battery charger, functioning as a complete wireless charging receive circuit in a wireless power transfer or WPT system. Other required WPT components include transmit circuitry, plus a transmit coil, and a receive coil. The LTC4123 works reliably with a simple transmit circuit.