Got an old makita 18v post style tool from the ni cad battery system?

This adaptor will give it a new life, plus the new slide on battery which is based on Lithium ion cell is MORE powerful as it discharges higher current.

Also please be wary, I used to purchase a similar product, black color, has a usb port, it drains my batteries slowly untill empty. It basically wrecked my 3ah genuine makita battery. This product is the one that's reliable that underwent all the tests and I give it to my friends, used it for a several months, and quite happy with it. 

But be sure to check that your tool is the 18v Ni-cad system not the 14.4 or 12v, and this adaptor can't be used for charging, only between tool and battery, not battery and charger.

Cheers and enjoy!