You can buy whats called a squid in our hobby..its a 4 mm bullet connector that plugs into most aftermarket chargers....as for chargers Id take a look at the toolkit M8 has many options in a charger ,can also test many radios and all servos... then you will need a 12v power supply do some reading on this I'm all for making or moding a atx computer power supply. Its a easy task...a few parts and some soldering skills your good.. have a moded atx for almost 15 years I use every week..its best to condition a new nimh 1st then step up in amps you charge it at for best life cycle..