Sollie is correct:
Sorting the interior turret wiring is a task and a half and the heavy tank NiMH Battery once placed in the Leo turret will either warp the turret over time and or cause it to immediately sag to the rear, causing the turret to drag or get hung up on the rear deck.
I like the battery placed in the hull solution, that was
the main take away tip from the various rc tank forums, a few years back that I received, before my Leo 2 build. Daryl Turner did this custom one off modification to my Leo 2, unique at the time and above my modeling design and fabrication skill level. It works great for easy battery swaps. You can look at your build instructions and figure out your own direct solution to achieve similar results, if that modification is important to you.
NiMH Battery Recommend:
The DuraTrax 7.2V Onyx 4200mAh NiMH Battery DTXC2061 works for me, "lipos" are not a very good or safe idea in my hands
http://www.ebay.com/itm/NEW-Duratrax-Onyx-NiMH-6-Cell-7-2V-4200mAh-Stick-Battery-Pack-Standard-Plug-DTXC-/322271694700?hash=item4b08e3cf6c:g:A54AAOSw8w1X5nk j
Important Tips; Tamiya Leopard 2A6 RC Radio Selection.
A. Futaba
4YF-2.4 Channel Radio System, not that great with the Leo 2.
If you are
NOT installing a Tamiya Battle Unit, using the Tamiya Main Gun Stabilization Unit or accessing the complex stick controlled lighting features on the Leo, a
Futaba 4YF-2.4 will still work for basic driving and shooting and
work poorly for everything else. The Futaba 4YF 2.4 does need "one" self centering stick upgrade kit.
Get the needed Futaba 2.4 stick parts here by calling and placing your order:
Hobby Services
Champaign, IL
217 398 0007
Futaba 4YF-2.4 Self Centering Stick Parts.
1. HSP78901. 1M10A18201. Swing Arm ST-53, QTY 1
2. HSP67450. 8M00F01002. Spring ST-41, QTY 1.
B. Futaba
4YF-FM 4 Channel Ground Radio System, best choice with the Leo 2.
Tamiya USA highly recommends using the Futaba
4YF-FM 4 Channel Ground Radio if you are using all the tanks features and want to achieve trouble free working access to the TBU, Stabilization Unit and the stick controlled lighting. The FM Ground radio does not need a self centering stick kit.
My Leopard 2A6 build brief is here:
http://www.rctankregiment.com/rctank...=2247&start=20
Great fun to build and run, enjoy the process.
John