Energizer

Info
This upgrade increases the damage from your tank's primary and secondary attacks when its health is below 30%.

Rare
+30% damage

Epic
???

Strategy
This upgrade does not currently see much use. While the damage boost is significant, the conditions that must be met before it applies are extremely prohibitive.

Unless you choose your other upgrades and adopt a playstyle that revolves specifically around an Energizer (possibly with a high-health tank or one that can recover its health easily), equipping upgrades with static bonuses will usually be more effective. Sparky, Phoenix, Shift and other tanks with similar stats and abilities may be able to make use of this upgrade.