Not too sure if you could without the tool, i'm sure others on the forum could chime in. That being said, I've changed the factory stock H7 stock Varta battery that came with my MY2011 back in 2014 to a H8 Duralast AGM battery from autozone for a little under $200. I just popped the old one out and fit the new one in. I just had to reset the one touch power window function and sunroof function and that was it. I never got around to resetting the BMS on the truck. It's been 4 years later and 40k miles and everything is still in tip top shape. I'm sure others will say that the charging system needs to register the new battery to come up with a new charging profile, but i think the truck automatically "learns" that a new battery was installed and adjusts the charging profile accordingly after a few hundred miles.