Trojan T125 ah rating

[Rumwalker]

I am new to this forum, learning a lot.
My old batteries are tired!
I have 4 Trojan T-125 6v lead-acid batteries wired in series/parallel to make a 12v bank. Could someone tell me what the amp hour rating of that bank would be compared to three Battle Born 12v 100ah LiFePo4 batteries (300Ah)?
If I understand correctly, with the BB lithium batteries, I can get 80-100% of the stored energy as opposed to 50-60% out of the lead acid batteries.
The Trojans are individually rated, when new, as follows:
5-hr 195Ah, 10-hr 221Ah, 20-hr 240Ah, 100-hr 266Ah.
I confess to being confused by all this, I guess what I am asking is: Can someone give me an easy to understand comparison of the amount of usable energy in those two battery banks?

 

[SolarRat]

Right now you have a 12v 480ah bank that you can "use" about 240ah at 50% DOD.

3 BB's at 80% DOD would be about 240ah also.

So basically the same. Max safe charge rate of your Trojan bank is probably about 60a @12v...you could probably go higher on the BB's, but I'm not familiar with them.

 

[Rumwalker]

Thank you SolarRat for your reply.
I reached out to Battle Born Batteries, they responded “The max charge for 3 BB10012 in parallel is 150 amps!”