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.