http://www.apc.com/rely/index.cfm
Check Model Number
The number at the top of the sticker is the model number. Check to make sure the model number listed on the sticker is one of the following: 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, or BK500TW
Check Serial Number
The second number on the sticker is your serial number. Only units with serial numbers having the first six characters in the following ranges are affected:
AB0048 through AB0251
BB0104 through BB0251
JB0125 through JB0251
Any units with an "R" at the end of the serial number are not part of the recall.
for further info and recall instructions click the link.
I have 2 on the recall list, filled out the online recall form and I now have 2 new ones on the way, with return shipping labels for the old ones.