Dual battery system - DR 650 (help)

[Fulltaps]

Any suggestions on a dual battery system for a round the world tour on a DR 650. Obviously with the limited space being the main issue. I heard that you get expensive but very small batteries that could possibly fit into the original space ?? LeCap any ideas ?? 

 

[chopperpilot]

 

[DeepBass9]

 

[lecap]

 

[michnus]

 

[Just_Plain_Dan]

 

[Mr.T]

 

[lecap]

 

[Vlakhaas]