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Critical applications, like Uninterruptible Power Systems (UPS's) rely heavily on the battery system when called into action. 

All batteries and are not created equal.  Gruber manufactures batteries specifically for UPS's, and offers one of the longest shelf lives assuring your equipment long life and reliability.
APC  RBC-1
 

APC Part Number

Gruber Part Number
RBC-1 58-GPS-RBC-1

Electrical Specifications
Style Voltage Amp/Hour Batt / Pack
AGM 6 Volt 4.5 AH 2

Dimensions
Length Width Height Weight
2.76" 1.77" 4.21" 5.1 lb






To find which UPS's use this pack click on UPS search
 
UPS Application Chart
BK200B BK200 BK250** BK280B BP280 BP280B
BP280S BP280PNP BP280C BK300 BK350 BP350
BP350UC BK400 BK400B BP420 BP420C BP420PNP
BP420S BP500 (All) BK500M      
SU360SX SU420VS SU420NET PCPER PCPRO  

**  When purchasing for APC model BK250, please verify to make sure which style of battery you need. 
Depending on  how old your unit is APC used either the RBC1 or the RBC2. 
You can tell if you need the RBC1 instead of the  RBC2 if the APC Logo on the front of the backup is slanted to the right 
and " American Power Conversion" is printed through  the center of APC. On most of models that use the RBC2 the APC 
is straight up and down and "American Power  Conversion" is printed under the APC letters.

 
APC battery configuration shown prior to battery replacement

(Save and re-use your cables and fuses)