I have looked online and notice there is A LOT of parallel charging boards out there. My question: Is there a Series charging board out there? I have only been able to find an adapter wire (had to order from china and on Ebay), but would like it to be more permanent. I have (2) 2S batteries that I would like to charge in series. Seems like this should be more common considering the 1/8 market moving to saddle packs again.

A little background, I have the 1/8 buggy from Kyosho Mp10E that utilizes the saddle pack battery method. Those batteries are run in series to make a (ONE) 4s battery. I would like those batteries to always charge together so they are very close in balance.