APC Extended Run XL Battery Packs can be very complicated. Here are some important facts:

• Only "XL" Models can have Packs added to them
• Even though APC may say only 1 pack will work for a unit, many packs can be modified to match
• To find the pack you need 1) APC UPS Model #, 2) Plug type on back of UPS, 3) Your load and runtime needs

Each thumbnail shows

• Our part number [BPxxx]
• Corresponding APC Model numbers
• Battery capacity (vah) in upper right [more capacity = more runtime]
• Plug Combinations [this must match your UPS]

We also offer these tools to help in the search

• Our Sortable XL Pack feature table w/ thumbnails & links
• Official APC cross references & links
• Our simplified runtime table [coming soon]