12-2
Cisco 1240 Connected Grid Router Hardware Installation Guide
OL-26223-04
Chapter 12 Installing Battery Backup Units
Battery Backup Units
The BBU internal components include battery cells, a primary protection circuit, a fuel gauge, and a
charger. For detailed, illustrated descriptions of the BBU, see the “BBU Components” section on
page 12-5.
Figure 12-1 Battery Backup Units Mounted on Router Door
BBU Status
The BBU is automatically enabled and begins supplying power to the router when the router detects that
power is not being received from the AC power supply. The BBU continues to supply power to the router
until at least one of the following conditions is met:
• All BBUs are completely discharged
• AC power to the router is enabled
• The BBU battery cable is disconnected from the router
• The BBU is disabled with software commands (see the “Related Commands” section on page 12-23)
Item Cisco Product ID (PID) Description
1 CGR-BATT-4AH Battery backup units. The router supports up to three BBUs, as
shown here.
300558
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