With output power from 55 to 155 W and active power-factor correction, the AD 55/155 enclosed switching power supplies provide the ancillary benefit of an extra battery-charger output for support/UPS external functions. Each model accepts universal input from 85 to 265 V ac. Ten models provide single or dual outputs of 5, 13.8, 27.6, and 53.5 V dc. Other features include a power-good LED indicator, an output-adjustment potentiometer, and international safety approvals. Prices start at $25 each for 55-W versions and $49 each for 155-W models. Delivery is from stock to two weeks.