Properly charging Lipos is more than just pressing the button and waiting for the beep.
MyLipo supply the highest quality silicone and cable there is. The 4mm power plugs are Gold coated, This means your charger can delver the most power to your Lipos with the least resistance. Jack socket is 5.5mm
Note : This lead is for Fat Shark Goggle Lipos but can be used to discharge lipos too
(The Fat Shark 7.4V 1800mAh battery pack features a high capacity 7.4V 1800mA LiPo pack, battery charge level indicator with LED, low voltage cell and short-circuit protection and internal cell balancing circuitry. The balance lead on this battery pack is used as accessory lead for powering the optional fan plate and it should NOT be used as a balance charge lead. )
See the full Fat Shark PDF here