Nine Ball Tokyo Marui MP7 AEG External Battery Adapter

At the time being, the only battery that fits Marui MP7A1 is the Micro EX. Certainly the fans are not happy about the constrained power. Hopefully, here comes a solution from Nine Ball: External Battery Adapter for MP7A1! It greatly enhances both the discharge cycle and duration. Upon the successful conversion, 8.4V Mini/Small type battery can be connected through the kit's mini-male connector.

Note that 8.4V large type or above battery should be avoided as damage is possible.