ADZZZYs Armoury shows how convert the Tokyo Marui NGRS to use Deans connectors for Lipo batteries... "How to use lipo batteries with your Tokyo Marui NGRS airsoft AEG. The TM NGRS range as standard require a proprietary battery to make them function. This allows for the use of a greater range of batteries using a deans connector. This can be applied to the TM HK416, M4 Sopmod, MK18 and URGI, CQB-R and HK417."