re: Decision on new truck battery?

My truck has had a Sear's Platinum AGM for about 8 years now, no signs of going bad yet. It had a Motorcraft AGM for the 13 years prior to that. I have always kept my vehicles on battery maintainers when not being driven, have wired in quick connections so it's not a hassle. I've gone through a handful of Schumacher float chargers over the last 20 years, I have a Solar brand one too now that has more options as far as battery type and charge rate. I wouldn't buy a spare to keep around, you'd have to maintain it same as one in the vehicle otherwise is will be worthless by the time you needed it. I have a heavy-duty J-n-C jumper pack I keep in each vehicle.