The code BATT came on DCS remote for Lionel Locomotive. I checked the Duracell 9v and it was indeed low and needed to be changed. I had an extra MTH rechargeable battery and charged it overnight. Checked the voltage and was fully charged and installed it.
Everything on the engine worked fine. Except, the code BATT didn't, go away. I tried to reset the engine and that didn't work. Took a battery out of the Remote and that didn't work. Then I went to a MTH loco and the code BATT was still there. Finally went to the DCS 3rd edition and could fine nothing to reset the Remote and remove the code BATT.
Does the Duracell alkaline battery need to be used as Lionel suggest. I would think a rechargeable shouldn't make a difference as long as it holds a charge.
I would like any suggestion onto remove the BATT code from the screen on the remote.
#1 TMCC is a one way communications protocol (remote to base to engine). Even IF the 9V battery in a Lionel loco mattered (It does not for operational purposes), let alone was measured for charge (the Lionel circuit does not "measure" the battery), the very protocol never allows that to get back to any remote- not Lionel and sure as heck not an MTH remote.
#2 The battery indication on the remote is your batteries in the remote are low.
#3 Yes, battery type DOES MATTER. Regular batteries are 1.5V nominal full capacity. Rechargeable batteries are only 1.2V each. So when fully charged or full regular batteries are installed 4X1.5V= 6V, however, 4X1.2V batteries is only 4.8V a full 1.2V difference. So this is why when using rechargeable batteries, they may indicate discharged battery warning status early compared to the same result using 1.5V Alkaline batteries.
#4 The DCS remote also has a backlight function and this draws current and when ON can shorten battery life as well as further causing early display of the battery low warning indicator.