Tom . . .
Do not make any decisions based on my reply...
I don't have a HYBRID model Limited. So, I am just talking "generally."
There are 2 batteries under the back seat of a GEN 4 Tacoma.
One is the 288v NiMH and the other "should be" a 12v AGM. (neither battery chemistry should...
Unless your truck has been sitting for an extended interval, that's unusually low for a Tacoma, even with Hybrid power system. You mentioned you weren't sure how low it can go to power your electronics. That battery voltage is something like 50 % charged or less. (depending on the chart used)...
I think I bought the cheapest one on Amazon with good reviews. It's been perfect. It has "good enough" quality, works well, doesn't rattle, and I haven't had the slightest problem.
I will add...I have a 2025 Limited with a duel tipped exhaust. This is close enough to the mounting location...
Well, I can't tell you how to add it cause, mine already had it. However, I love the thing. I like the fact that it's on the alarm system, and that the bed cover locks onto it. I doubt this truck will ever see off-road in any real way, But it sure is handy for groceries. I have a "last boks"...
I went with the standard limited with every option I could get. This is a daily driver. Even thinking about taking this thing off road would cause me great concern. I don't even want rain on it. I'm in middle Tennessee. I didn't need full-time four-wheel-drive. (but I wanted four-wheel-drive...