i bought a charger like that and it came with 2 spare batteries for 10 shipped from china. charger works great...batteries work, but when they are placed in the X the battery symbol on top has a ? in it. and u cannot charge ur X the standard way with the aftermarket cheap batteries. only in the wall charger they came with. but the batteries themselves last a long time, and work fine. so for $10 it was well worth it.