Batteries for herelink controller

Hello everyone
I have a HERELINK CONTROLLER , which is out of order due to its battery. I am searching the internet e-shops , but the batteries which are offered are equipped with 5 CABLES for the plug of the battery.
Our HERELINK CONTROLLER has a built in battery with 3 cables in its pin .
Any ideas where I can find batteries , since the reseller has never responded to my request .