Hi Tom

I us the Pro-Peak Sigma AC/DC Charger to 5A controller from technobots (however i have seen them for around £75 on other sites)

it can charge loads of different types of batteries including Nimh all the info is on the site, you just plug into the wall and go however you will need to buy some extra wires for charging

thats what i use and my Nimh are charged probably full charge in 1 hr

hope this helps