FWIW. The Autozone Group 49 I installed three years ago works fine and starts the car easily down to 10 F. It sits for months at a time and still is able to start the car. It wasn't expensive and may have come w/LLT warranty, not positive about that.

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1985 300D 197K - Semi-Daily Driver Diesel
1998 Volvo V70 AWD 226K - Daily Driver 2
1998 Volvo S70 140K - Wife's DD
2003 GMC Sonoma ZR2 Option - Rusty Truck
THE BABY 1958 220S Sedan 66K All original, never restored and never will be.