Use the following table to determine the part number for the field replaceable unit (FRU):
| CCIN or FFC | Type and model | Part number | Description | Location code |
| E2A | Any | 03N7031 | 128 MB cache, U.S. (includes battery) | |
| E2A | Any | 19K0561 | 128 MB cache, Japan (includes battery) |