Tesla armor

Tesla Armor is a name given to various kinds of armor designed to protect against directed energy attacks, constructed from plans left behind by Nikola Tesla, confiscated by the US government after his death.

Pre-War Tesla Armor
Unlike the basic metal armor it strongly resembles, this armour is an actual pre-War military design. Its three Tesla Attraction Coils disperse a large percent of directed attacks. However, since its protection against conventional firearms is comparable to the post-war metal armor, its popularity was limited, although some suits made their way to National Guard depots and from there to the wastes.

Midwestern Brotherhood Tesla Armor
This version was likely designed after the Great War by the Midwestern Brotherhood of Steel, based on the pre-War model. The main difference is that its Tesla Attraction Coils are not in the form of protruding rods, like in the earlier variant.

Tesla Power Armor
This armor is a variant of the Enclave's post-War Advanced Power Armor Mk II jury-rigged with a Tesla device that is capable of dispersing a large percentage of the damage done by directed-energy attacks.

Vault-Tec Tesla Armor
The Vault-Tec Tesla Armor developed in the Secret Vault is different from other pre-War or post-War variants. It appears to be a bit similar to Vault-Tec's Power Armor. They are the two tesla coils on the shoulders for dispersing a large percentage of directed energy attacks.