Injection moulded battery adaptor from Makita battery to Dewalt tools. 

This is from the same material as your battery case, so it's guarantied tough, works great on my tools.

Disclaimer: The adaptor only allows your tools to use batteries from other brands, it is not designed to charge your battery with differently charger. Uses it however you want it with the tool for discharging, but I do not accept responsibilities for injuries or loss causes by other use/misuse of the adaptor.