I'm glad you've had good experience with the NOCO 1A; I have not. Our RX battery bit the dust but in fairness I had the leads connected under the hood while the battery is in the boot. Our TSX new battery was drained but not dead, but this was in a shorter time. I am replacing my 1A tenders with higher output models.This ^^^^^^^^^^
I keep all of my vehicles on a Noco Genius 1 Battery Maintainer. It has a maximum output of 1 amp, but will also maintain in milliamps, as well as just monitor the condition of the battery, and add juice as needed, thereby maintaining a 100% charged battery with no worry of overcharging.
It also comes with a harness that you can hardwire right to the battery terminals, and run out the front grille.