The battery packs on an APC symmetra have a life span of around 5
years, and replacing all of them at once is an expensive proposition.
In an attempt to cut costs, I decided to replace the individual
batteries that make up each unit.
APCs SYBT4 part number refers to a 4 pack of the individual SYBTU1-PLP
part, which is a long chassis with a handle at one end and a connector
at the other. Each SYBTU1 contains eight individual batteries, and a
small circuit board.
The batteries found in my particular unit were Vision CP1270s, 12V and
7.0 AH rated. You can get these batteries from online vendors such as
osi battery. They are available with the F1 or F2 designator that
indicates the size of the terminal on the battery – for the APC
project, we wanted the f2 batteries with the 1/4 inch lug.
So, once you have gotten your eight batteries, you can get started.