Transmitter charging issue

[Hog]

Just thought I'd throw this out into Oople-land to see if anyone has ever had the same issue.

KO Esprit Vantage 2 tranny, 2400mAh NiMh cells in it and never had a problem charging with the cells in situ via one of the channels on my 4 way charger.

Current 4 channel charger is starting to play up, so the missus says get yourself a new one for Crimbo. Over to my local shop, and picked up a SkyRC Q200. Get it all set up, but it would not charge the transmitter. Error message was "no battery detected". Checked all the leads, tried another transmitter, all with the same message. Took the charger back where the model shop hit the same problem. It was mentioned in the shop that there could be a diode in the KO tranny on the charging socket that some chargers don't like.

Anyone else know of this or hit a similar issue?