var list = $pnp.sp.web.lists.getByTitle("BatchTest");

list.getListItemEntityTypeFullName().then(entityTypeFullName => {

    var batch = $pnp.sp.web.createBatch();

    for(i=0;i<3;i++){
	    list.items.inBatch(batch).add({ Title: "Batch"+i }, entityTypeFullName).then(b => {
            console.log(b);
        });
    }    
    batch.execute().then(d => console.log("Done"));
});