Yes, it is. From some weeks I connect my FR235 to PC and it is discharge instead of charge. I connect the device to my pc when it is to 12% of charge and few minutes he goes to 2-3%. I try to change usb port, I try to change PC, then I try to connect the charging wire to smartphone battery charge but with the same results. The FR235 has about 28 months, so it is out of guarantee. Can anyone suggest me what to do?