Energy Warfare

Energy drainers
''In-game description: Each robot's inner energy network is protected by a software-based security system. Drainer modules break the code first then create an electromagnetic bridge between you and the host. The result is clean, fresh, stolen energy. It seems that the accumulator of native robots cannot be fully depleted.''

Installed in Chassis Misc slot

Drainers essentially steal a portion of your target's accumulator and add it to your own. How much is stolen depends on the size of drainer and targer, and how much target is resisting the incoming EnWar.

Energy neutralizers
In-game description: A static, ionized field generated by the module depletes all the energy from the nearby, targeted accumulators - including yours!

Installed in Chassis Misc slot

Neutralizer description is a little confusing. What it actually does it takes energy from you, and removes more (usually) energy from your target. However, rules of dispersion still apply, medium neutralizers will struggle with efficiency if used on small bots. Also, if target has equipped Reactor Sealings, it will resist the neutralization and you might end up hurting yourself more than you hurt them!

Reactor sealings
link to Reactor Sealings