Need help with Rechargeable batterys (what I need)?

[Darth Sorn]

Hey guys

I need a little help in what I need to order in the way of rechargeable batteries, I've worked out that Tellason is way too much trouble to keep taking apart just to change the batteries so I decided to put a Rechargeable battery pack in it instead. However looking on the forum about what I need to order has kind of confused me, so here is what I've worked out so far;
For a luxeon 3 Red/orange with the ultrasound V2

2.4V-7.2V Nimh Smart charger

4.8V AA 2600mAh NIMH Rechargeable battery pack or 4.8V AAA 1000mAh NIMH Rechargeable battery pack (not sure what one I need to get?)

2.1mm Power Jack

2.1mm plug adapter for smart charger (I think?)

that how far I've got atm but I'm really not sure if it's right or if I’m missing anything, so can someone please help me
Thx