Replace the Battery

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Prepare the host for battery replacement.
To correctly reset the date and time before replacing a battery, you must prevent the host from automatically powering on and disable any NTP connections.
1. Check the HOST_AUTO_POWER_ON property.
```
-> show /SP/policy HOST_AUTO_POWER_ON
  Properties:
     HOST_AUTO_POWER_ON = enabled
```
2. If enabled, set the HOST_AUTO_POWER_ON property to disabled.
```
-> set /SP/policy HOST_AUTO_POWER_ON=disabled
```
3. Check the NTP policy for the /SP/clock.
```
-> show /SP/clock usentpserver
   Properties:
      usentpserver = enabled
```
4. If enabled, set the property to disabled.
```
-> set /SP/clock usentpserver=disabled
```
Replace the battery.
Replacing the battery is a cold-service procedure. The server must be completely powered off and power cables disconnected before performing this procedure.
1. Prepare the server for service.
2. If a PCIe card is in slot 6, remove it to improve access to the battery.
  See Remove a PCIe Card or Filler.
3. Remove the old battery
  Gently push the battery toward the service processor to release it from the retention clip.
4. Unpack and install the new battery.
  Press the new battery into the battery holder with the positive side (+) facing the side of the server.
5. If you needed to remove a PCIe card from slot 6, replace that card.
  See Install a PCIe Card or Filler.
6. Return the Server to Operation.
Reset the system clock.
1. Use the Oracle ILOM clock command to reset the system clock.
  The following example sets the date to August 22, 2016, and the timezone to EDT.
```
-> set /SP/clock datetime=081221302016 timezone=EDT
Set 'datetime' to '081221302016'
set 'timezone' to 'EDT'

-> show -d properties /SP/clock
 Properties
    datetime = Mon Aug 22 13:20:16 2016
    timezone = EDT (EST5EDT)
    uptime = 2 days 19:56:49
    usentpserver = disabled
```
2. If the SP policy HOST_POWER_ON was enabled before you replaced the battery, you must re-enable it.
```
-> set /SP/policy HOST_POWER_ON=enabled
```
3. If the /SP/clock usentpserver property was enabled before you replaced the battery, you must re-enable it.
```
-> set /SP/clock usentpserver=enabled
```
Verify the battery.
```
-> show /SYS/MB/BAT
```

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