Specifications:

Brand: Energy+

Model Number: B9780

Chemistry: Alkaline

Voltage: 4.5 Volts

Capacity: 1100 mAh

Dimensions: 1.5 x 2.25 x 0.9 inches

Weight: 0.2 pounds

Connector: 4 Pin with pinout +|k|o|-

Wire Leads: 8.5 inch

Mounting: Hook-and-loop mount for easy installation

Special Features: Designed specifically for PC and AT clock and memory backup. 

An upgrade for Rayovac 844, 841, and 840 batteries.

Key Features:

Premium, USA made batteries for your systems.

 Compatible with a range of part numbers including:
 

Compaq 160255-001

Compaq 160274-00

Hewlett Packard 304320-003

Apple 3LF22

Military 6135-01-318-5001