Lithium Ion Battery 12 Volt 12 Ah

Lithium ion battery in a lead acid case. See picture showing maximum bend angle for J2 terminals to engage battery compartment spring plates (15-30 degrees). Includes dedicated lithium ion charger. Fits all M4 models. Provides 50% more power than the standard 8 ah lead acid at 35% the weight. (Weighs only 1.75 lbs versus 5 lbs for the lead acid. Energy density 82 watt hours per pound versus 19.2 watt hours per pound lead acid. 430% improved energy density.) 

If you already own name brand lithium ion 20 volt power tool batteries (ie, DeWalt, Milwaukee, Makita, Ridgid, Black and Decker, etc) and would like to convert you M4 sprayer to use them instead of replacing the brick style battery, use the link below for the battery conversion kit (requires installation):

https://my4sons.com/collections/new-products/products/battery-base-plate-upgrade-for-dewalt-milwaukee-bosch-makita-black-and-decker-ridgid-hercules-battery-and-charger-not-included

Normal lithium ion voltage operating range: 11.3-12 volts

Built in battery saver circuit protects against full discharge and overcharging. 

Multimeter option provides a separate digital voltmeter to accurately measure voltage.

*****Use only the charger provided to prevent permanent damage******