Yes, I have used their LifeP04 specific chargers (model TM-271) and can vet them for a few reasons:
When it detects an over-discharged LFP battery, it will *try* to bring it back by using very-very small amounts of current, until it reaches a nominal 13.8v, and then apply full charge - if it passes testing. It will take a LONG time to do so.
The best part is that if you've left your battery discharged so much that degradation has occurred, it will know, stop, and warn you. It's dead Jim - it will try to revive if it can, but will not bring back a totally degraded zombie so you won't waste time or be unsafe.
Basically the moral is that while you haven't done the LFP battery any favors by taking it down so far, *if you get to it in time* before it starts to eat itself (like in a day or two), it will gently bring it back. But no guarantee - at least it signals you that it decided it was too unsafe to continue.
(Usually an indication of endless intercalation ion storms, but that's another subject)
The target market is mostly motorcycle / vehicle users using LFP who left their headlights on overnight. If dealt with in time, they may have cut many cycles off the battery, but if it can be brought back safely, it will do so.
I used it on my bare non-bms prismatic bank to revive after an accidental major discharge. Thing is, I got to it the very next day. I didn't have the time or inclination to drag out my bench-supply, stopwatches and so forth, so I just let the Tecmate-Optimate Lithium charger handle things.
