Craftsman 40V Battery Holder

I created this battery holder since i just got a battery powered lawnmower and wanted to hang my batteries. I didn't see any holders so I designed this one. It works with my 2 Ah (29141, 40V DC 73Wh { http://www.craftsman.com/craftsman-40v-lithium-ion-battery/p-07198740000P }) and my 4 Ah (138.98742, 40V DC 146Wh { http://www.sears.com/craftsman-40v-rechargeable-lithium-ion-battery-98742/p-07198742000P }) batteries.