Had my first failure with FC 40 last week, The battery charger has stopped working, Charged the batteries fine for first few charges but then just went into some weird mode of flashing the main led red and green and the cell balance led's in a random way and did not put any charge back in batteries, Charged batteries on a different charger and they where fine. Have sent the charger back to the dealer under warranty. Seen all the videos on youtube of a solder repair to circuit board after I sent it back so did not open it up to check if that was the fault. That fault seemed to be caused by people plugging charge lead in wrong way round but that was not my problem as lead's where never removed from charger after first charge. Any one else had problems with charger ?