My Transmitter batteries went bad. Was looking for replacements. I could of just cut the connectors off and remounted them. But after looking on different websites, the drone people recommended this site. Batteries America - www.batteriesamerica.com On the left side about 1/2 way down they have them for R/C hobbies. They make what capacity you want, so they have them at different price levels. With the proper connector. Got mine 5 days after I ordered them.
Best are the enloop batteries & if your using the 1st gen DX6 there is a replacemnet transformer conversion to double your battery time.