The chart is true...
...but the way Hamas does things (currently to Israelis, unless they have already lost - but most of time to fellow Palestinians, particularly those who oppose how they rule Gaza) is brain-dead. They practise torture, extrajudicial imprisonment and executions without trial, not to mention mild stuff like suppressing freedom of press and public discourse.
Hamas is a political zombie whom nobody dares to approach or touch. To me it seems that they bring much avoidable misfortune to the people whom they rule. They got to power with a democratic mandate (Fatah was spectacularly corrupt), but there cannot be a democratic mandate for ignoring human rights or initiating avoidable war.
Starting war is especially irrational if the opponent is many time stronger and their counterstrike will bring great suffering to a densely inhabited urban area. Especially if deliberate war crimes are committed right from the first hour, to give the opponent every diplomatic advantage and moral excuse for striking back hard.
I don't know why they started this round of fighting. I only speculate that war builds cohesion, and maybe they felt they were losing cohesion and needed some blood spilled to regain it.
No experience on that front, sadly.
Compared to iron redox flow batteries, it has about 5 percentage points of more efficiency (75 vs. 70%), slightly better cell voltage (1.8 vs 1.2 V) and better energy density per electrode surface (0.2 W vs 0.05 W / cm2).
The "resetting" of cells seems like a nuisance however. Quoting Wikipedia:
It's probably doable, but not a particularly attractive technology when compared to alternatives.