Shield Overcharge

The Shield Overcharge ability is a Defensive ability that constantly recharges your shields, allowing you to effectively "outheal" incoming damage as long as you have shields.

Tactical Analysis
The Shield Overcharge is best used to survive a slow barrage of burst damage, as it will continuously invoke shieldgates, effectively negating alpha damage weapons like the N-8 Mantis or N-7 Paladin.

However, it is not as good against DPS, as while you will negate some incoming damage, it will burn through your shields and likely chip your health to some extent.