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Israel doesn't have spare batteries to send, and the Iron Dome is not a good response to the threats in Ukraine. I see 0 chances of this happening from my armchair general position.
"Likely" is a teaser word.  No guarantee Israel will officially send the Iron Domes to Ukraine anytime soon. >

Didn't they say a few months ago that it was "impossible"? >

From what I know about the iron dome(which isn’t much granted), it’s primarily meant to stop low altitude, low velocity projectiles like mortars, artillery, RPG, etc. 
It is “impossible” in the sense that it wouldn’t protect against the high velocity of Russian missiles or the large number of artillery. 
Israel has a significantly worse equipped adversary in Hamas where the iron dome is possible. >

No, originally Israel said it was impossible to give the iron dome tech to Ukraine, that's what I mean