Fosworks formerly Peter Spoerer and a MyLocoSound Card. That is if I can stuff it all in, have another loco with the same stuff going in so can check it out for space with a test made up battery set. I tend to faff aroubd with Batteries and Soace using tape then send a pic of what I need to Fosworks to make up a rechargeable NiMh set for me. Do not nor will not use other types as yet. Prejudiced against them.