The Miller 301756 battery is designed exclusively for Miller's Venture 150 S stick welder.  The battery offers 400 Wh at 52.8V.  Miller's Venture 150 S batteries have fast charging from 0 to 95% in under 30 minutes or standard charging under 60 minutes for extended battery life. 

The Battery management software protects the battery and allows it to operate optimally. Battery chemistry and cell design are engineered specifically for high demand of welding. 

Charger sold separately (301755).