I would like to change out the alkaline cells for rechargeable cells. Would you tell me exactly what parts I need to buy in order to do this? That is, what rechargeable battery holder goes in the Tx, and what wall charger to connect to the TX for charging. What rechargeable batteries are the best to use in your opinion? By the way the my TTx650 doesn't seem to drain alkaline batteries quickly. I just want to go to the rechargeable ones. Thanks a lot.

From the tech notes on the TTX650 transmitter:

May use NiMH battery packs like (HCAM6321) HydriMax Ultra 4.8V. To charge these packs through the input jack on the radio while battery is connected use (TACP0101) adapter. Use charger with banana lead inputs like (DTXP4235) Duratrax Onyx 235.

I got the hydrimax nimh 2000mAh pack. I'm charging it with a Thunder A6 charger at .2 amps. Is that okay? What should the full voltage read on my charger and my radio?

We're not familiar with a Thunder A6 charger. If it's set up to charge NiMH battery packs, you'll be OK. A 4-cell pack can read as high as 6.0V when "hot" off the charger, but will drop quickly to its listed voltage as soon as you start to use it.

I just use nimh ray-0 vac 2000 mah rechargeable battries from wal mart etc. they work fine using my spektrum . 4.8 volt charger. You can use and old futaba charger also. Just switch the leads so plus is on the inside. Because futaba plus is on the outside on the 4.8 volt side.

this will be my 2nd year in this rc airplane hobby i have a tactic 650 and just got the 850 love the tactic brand but i went to buy two NiMH battery packs (HCAM6321) HydriMax Ultra 4.8V. for the 650 . then i wanted another wall charger tactic TC100 like the one i got with the 850 and i cant find a place to get them not even the tactic website dont even show picture of it ?To charge these packs through the input jack on the radio while battery is connected i found a spektrum charger i think will work . but the big picture here is where are the parts for the tactic . batt door, firmware wires,,Chargers Etc.
hope you can help bax cause tactic to good not to have better support

Are you sure, all my Futaba chargers have the outside shell as the ground or negative terminal. Spectrum is the only one I know that has the outside shell as positive.

good to know i did not think about where the positive was. i just wish i could find the tactic charger somebody told me
tower hobby has them but i cant find them maybe i will have to call them

From the tech notes:

"To charge these packs through the input jack on the radio while the battery is connected, use (TACP0101) adapter. Use a charger with banana lead inputs like (DTXP4235) Duratrax Onyx 235."