A&K M249 box mag (nutsack) replacement battery sourcing

[hitmanNo2]

Does anyone know where I can source a battery for an A&K M249 box mag? (nutsack).  Doesn't need to be an A&K one, just one that works.  I can't find much about them but I believe it's a male JST-BEC connector with 4x HR03 cells (AAA sized) NiMh. 4.8V.

View attachment 134350

 

[Egon_247]

Any RC model shop would probably have something like that. It looks just like the one in my boys cheapy RC car.  

 

[JinxDuh]

https://www.bespokeairsoft.co.uk/battleaxe-universal-drum-magazine-usb-charger-and-battery

 

[Sewdhull]

Id be tempted to get a 2Ah lipo, 3.7v with a jst connector. Bigger if you wanted.