I have an 80 but this is all about the X2Power 27F battery so it counts. 
I just purchased the Batteries Plus X2 27F online. I'm picking it up after work.
X2Power Premium AGM BCI Group 27F Car and Truck Battery P/N SLI27FAGMDP. There's a $20 mail in rebate and a 10% discount code I used; CDP10011.
It will be $333 after all discounts including the $18 core charge. I had a note to buy this battery from 6 months ago, it's gone up almost $50 in that time. I used to have a Diehard Platinum Marine 31M and it died after 1 year, hoping this AGM experience trumps that one!
Charging and Use Overview
I'm running a 2007 Sequoia alternator in my 80 so I'm hoping that it will maintain it properly. I have an ARB 50 fridge running full time and plug my truck into AC power at night and on weekends. AC power feeds the fridge and a CTEK AGM compatible charger. I run the fridge for 1-2 days camping and run a 12v electric blanket for 2x-3x 90 minute sessions per night. I charge it back up with a Renogy 100W solar panel and Morningstar PWM controller. I have only 1x battery and a rely on a NOCO jump pack for when the clouds prevent solar charging. My old wet battery (3 years old Sears Diehard Gold) made it Fri-Sun last months with all clouds and rain (no solar charging) and still started the truck with 11.3v. Not too shabby but it's not holding a charge like it used to.

I just purchased the Batteries Plus X2 27F online. I'm picking it up after work.
X2Power Premium AGM BCI Group 27F Car and Truck Battery P/N SLI27FAGMDP. There's a $20 mail in rebate and a 10% discount code I used; CDP10011.
It will be $333 after all discounts including the $18 core charge. I had a note to buy this battery from 6 months ago, it's gone up almost $50 in that time. I used to have a Diehard Platinum Marine 31M and it died after 1 year, hoping this AGM experience trumps that one!
Charging and Use Overview
I'm running a 2007 Sequoia alternator in my 80 so I'm hoping that it will maintain it properly. I have an ARB 50 fridge running full time and plug my truck into AC power at night and on weekends. AC power feeds the fridge and a CTEK AGM compatible charger. I run the fridge for 1-2 days camping and run a 12v electric blanket for 2x-3x 90 minute sessions per night. I charge it back up with a Renogy 100W solar panel and Morningstar PWM controller. I have only 1x battery and a rely on a NOCO jump pack for when the clouds prevent solar charging. My old wet battery (3 years old Sears Diehard Gold) made it Fri-Sun last months with all clouds and rain (no solar charging) and still started the truck with 11.3v. Not too shabby but it's not holding a charge like it used to.