11 Hellbats with only pre igniter upgrade vs 11 (and later 22) fully upgraded Zealots with charge

How will a squad of 11 Hellbats with no base upgrades and only the pre-igniter upgrade fare against 11 fully upgraded Zealots and later, 22 fully upgraded Zealots?. The Zealots have charge.

[@novitrix9671]

Classic Day9 rule of more stuff beats less stuff!