Battery passed away – without notice !?

Hello and Ho Ho Ho! I have a problem with the tank on time for Christmas, I make myself up on the eve that jumped a bit bad to the next evening after the start of the stability not to get really warm in the interior and stop to start. So far nothing unusual – I wouldn’t have come across a message here in the forum by chance where someone asked if he should change the battery if his moose explained this to him a too low capacity has. Well, my moose didn’t say anything like that to me, neither the evening before nor during complete failure nor now. Because, of course, I didn’t get a new battery, I wasn’t (too expensive) and with all the other providers I ended up at 95AH. I have a 100AH in it and I want to have less of one again. Currently, the thick of the night hangs on the charger and then every night “on the last Rille” to jump. Without the comfort of the standing heater ng to use… Question; -What did you use of replacement batteries? -Does a ’97 XC90 have such an indication or warning message of a weaker/empty battery!?