Battery Convert AAA TO AA

Battery converter change from AAA to AA*, 

no support needed easy and quick to print and you just have to add a 6mm metal ball by pressing it in with heat

So why always buy two battery sizes for our small needs. Now I only buy low quality AAA in large quantities and when I buy AA I buy quality for high performance toys ... I'm talking about rc cars :)

Please boost if you like :)

*No danger of damaging your device with the adapter, the only difference will be in terms of battery life, but for devices like a remote control that consumes practically nothing, it's perfect.