The battery for the time-of-day clock, NVRAM, etc. is the failing item. 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 |
| 151 | 8203-E4A, 9407-M15, 9408-M25 | 44V4359 | Battery | Un-P1 |
| 151 | 8204-E8A, 9409-M50 | 16G8095 | Battery | Un-P1 |
| 151 | 9117-MMA | 16G8095 | Battery | Un-P1-C11-E1 |
After replacement of this FRU, do the following: