Originally Posted by Styrak
You really don't need anything more than 8.4v or 9.6v in a large type battery.
The KWA M4 S System have an internal battery compartment inside the rail system. I need to make sure the battery fit in the compartment. The problem is that I am waiting for the arrival of my new gun but it has only 48 hours return policy for returning a defect product. This is why I would like to get a battery before my gun arrives, so I can test the rifle upon arrival.
I am hoping some airsoft guru or someone who is currently owning this gun would be able to point me to the right direction.