mightygus

Well, for the completest in me I cracked open the controller that just arrived, and of course the battery is one of those generic lumps like the green one above. Going to leave this here in case anyone else is interested. 3.7v 2000mah did the trick in the end. I actually used a Nintendo DS battery

Thanks mate, thats some good info already...appreciate it:)

Sort of a weird question, but does anyone happen to know the specs and make/model of the battery in the Hyperkin Retron 5 Controller? The reason I'm asking is 2 fold. A friend donated a controller which had a busted battery (which he conveniently threw out...clever I know) and I'm looking to get a replacement battery. Also, I have a Retron 5 system coming from the US as a Christmas gift and of course Australia post won't let me get the thing shipped without a Material Safety Data Sheet. I would appreciate even just a pic of the thing with some code numbers to start investigating, but if anyone knows more about it than that, the info would be much appreciated. Thanks (ps I know people hate the controller, but I actually quite like the stick) (pps... this pic is my only lead, found on another forum... green is possibly the battery.... credit to Ellie Doodle on Element14 for the pic)