This Enersys Cyclon 0819-0012, 0819-1006 Pure Lead Monoblock battery, is used in Life Fitness & Star Trac 580-0305, the Lifecycle R91 and the Lifefitness 95RI Excercise Bike. Formerly known as Hawker Cyclon batteries - This 6V battery pack will provide incredible power density, cycle life and fast recharge capabilities.  

This battery will replace the following part numbers:

08100079, 08100202M, 08191006, 12263, 12530, 12708, 2001, 23-181A, 237, 2617, 557520, 7251276, 8800005, CE708, DAN08190012, HEP0819-0012, JAB0819-0012, MB0819-0012, PSG625, SLA0878, SLA1255, 0819-1006 , 0017-00003-0685

0819-0012 Battery Specifications:
Chemistry: Pure Lead Acid
Voltage: 6.0 V    
Capacity: 2.5 Ah
Dimensions: 4.48"" L x 1.81"" W x 2.75"" H (113.8mm x 46.0mm x 69.9mm)