This one from Dad: APC, the popular manufacturer of UPS units has a safety recall on the following models (as of this date): PRODUCT: The recall is isolated to the BK325I, BK325-RS, BK350, BK350EI, BK350-AZ, BK350-FR, BK350-GR, BK350-IT, BK350-UK, BK350JP, BK350IX218, BK475I, BK475-RS, BK500, BK500EI, BK500-AZ, BK500-BR, BK500-FR, BK500-GR, BK500-IT, BK500-UK, BK500BLK, BK500JP, and BK500TW product models. For details and how to check your UPS, go to APC - Safety Recall: Back-UPS CS models in both 120-volt and 230-volt units.