Gotcha! I almost immediately shot all my ammo having fun and seeing how the weapon worked. :P
Yea I think we should've maybe given the player a bit more freedom to use the weapon by lowering the firing cost. Now it's almost mandatory to save up on the ammo for those big waves of enemies. The original plan was to give the player some indication about where the battery packs are currently spawned so that getting more ammo wouldn't be purely based on luck, but unfortunately the deadline hit a bit too soon :)