Looking to carry second battery . . .

[Tantalus]

I have a new Yamaha Civante - that has same exact battery as my Haibike. (I now have 2 batteries that I can mix/match between the 2 bikes)
I would like to buy a backpack (MTB style) to carry the second battery for long rides. I know that ERGON and EVOC make nice ones, but are there any other options available here in the US market?

 

[Stefan Mikes]

If I have to, I use Ortlieb Vario. Look it up please.
As the battery is heavy, Ortlieb Commuter Inserts (it is a single piece despite of the name) -- or Ortlieb Ultimate Camera Insert -- is a necessary companion for the backpack. Otherwise, the battery would tear a hole in the bottom of the backpack soon.

Could you tell me the battery dimensions? I could check the Vario for the size.

 

[Tantalus]

Battery is 15x4x3 approx.