SkyRC RS16 1S charging

[Rumbl3r]

Any RS16 owners tried this and got it to work?

I've tried to use a 1S charging lead that has a balance plug on it. When I start the charge it says 'No Battery'. If I disconnect the balance plug it works fine. There's no option on the menu for Balance Charge with a 1S setting, so it's not that.

I know that some chargers can't work with the balance plug input on 1S, but thought the RS16 could?

TIA