WLtoys Replacement 500mA Battery 3pc Set for Four-axis Aircraft V959, V969, V979, V989, V999, V929, V949, V212, V222 (with Protection) These three 500ma batteries are designed to replace the old or exhausted batteries on the following four-axis aircraft:. V959, v969, v979, v989, v999, v929, v949, v212 or v222.