3706 - BATTERY CHARGE LOSS (TRAIN PREP) ~~~~~ 3706 - BATTERY CHARGE LOSS (TRAIN PREP).  3706 replaced with new set of battery unit. Security/function test - OK.  Azmi/Isam 44973 #3706 Battery Unit S/N : OLD : KSF - 2013 - 163 L/R NEW : KSF - 2016 - 243 L/R