The difference between our Worx 20V batteries is their amp hour rating. The amp hour rating measures how much energy can be stored in the battery (energy capacity). The 20V Worx 2.0Ah battery gives you the power to care for the average 1/4 acre yard. The 20V Worx 4.0 Ah battery (WA) can hold twice the amount of energy and can provide up to double the run time. The WA.2 also includes 2 batteries.
Click here to get more.
Link to semitech
Power Share PRO batteries are 100% compatible with all Worx 20V, 40V, 80V power tool, outdoor power, and lifestyle products that are part of the Power Share platform. Although Power Share PRO batteries come standard with many Worx NITRO products, they can be used with traditional Worx products to achieve a longer runtime. PRO batteries are recommended for all Worx NITRO products for optimal performance.
If you want to learn more, please visit our website Worx 20v Lithium Ion Battery.