Optima Heavy Duty Battery 
Optima YELLOWTOP 12V (D31T)
SPIRALCELL TECHNOLOGY

Specifications:
 
| Model Number | D31T | 
| Voltage | 12V | 
| Cold Cranking Amps @ -18C ( BCI ) | 900 | 
| Cold Cranking Amps @ -18C ( EN ) | 975 | 
| Cranking Amps @ 0C | 1125 | 
| Reserve Capacity | 155 | 
| Capacity ( C/20 Rate ) | 75 | 
| Internal Resistance ( ohms ) | .0025 | 
| Dimension in CM ( L x W x H ) | 32.5 x 16.5 x 23.8 | 
| Weight ( KG ) | 27.1 | 
| Post Type | 3/8 Stud | 
| BCI Group | 31T |