Any Receiver Pack. Don't have a Li-Fe charger and don't plan on getting one any time, so Li-Po/Ni-Mh is ideal. This is going in an OFNA Hyper 7. I may also need one for my TRAXXAS Nitro Rustler. The 4-AA isn't powering my old 27MHz reciever's, so I may have to throw an extra 2.4GHz receiver in it. Offer up!