[ - WEAKNESSES - ]

PTSD: Soldier Boy is traumatized by the Russian torture and experiments he endured for almost forty years. One of his known triggers is a Russian song called Escape, which was played while he was being experimented on. When reminded of his trauma, he is emotionally overwhelmed and tends to lose control of his powers, particularly his new energy blast power. Furthermore, he refuses to admit to having PTSD (what was called "shell shock" in his time). As a coping mechanism, The Boys supply him with heavy amounts of Cannabis to calm his nerves and block his triggers. This seemed to work, but also increased his paranoia as a side effect.

Radiation Detection Equipment: After gaining the power to create blasts of radioactive energy, Benjamin's body now constantly emits high levels of radiation. Because of this, it is possible to detect him by using radiation detectors, a good example being when Mother's Milk was able to tell when he was approximating their location by using a Geiger counter.

Requires Time to Build Up Energy for Discharges: It can take considerable time for Soldier Boy to generate sufficient energy to discharge his radiation-infused energy blasts. It took approximately eight seconds for him to build up the discharge that was aimed at Frenchie. This allowed Kimiko sufficient time to move Frenchie out of the way, although she was struck herself, and the build-up for the discharge that killed Crimson Countess took even longer. This delay also allowed Homelander enough time to escape before Soldier Boy was able to fire his energy beam at him. The build-up for the discharge he prepared to try and kill The Boys and Homelander was the longest yet, giving Maeve enough time to tackle him through a window and detonate mid-air.

Blunt Force/Limited Durability: Though almost invulnerable, beings of equal or greater strength, namely Homelander, can physically harm and likely kill him. Additionally, while none of the testing the Russians put him through actually harmed him, the destructive tests were clearly uncomfortable at best and painful at worst. While he is able to survive his own radioactive bursts, having not shown any sign of a scratch after unleashing them each time, he has often appeared to be in pain on occasions when he used it, most notably when he was about to blast Homelander. Also, Butcher suggested that a fully-fledged nuclear warhead could have the sufficient force to kill him. Butcher's heat vision was also able to leave a wound on Soldier Boy's face, showing his skin can be cut with enough force.

Substance abuse: since his younger days, Ben was implied to be an alcoholic due to stealing Manhattan cocktails from his dad’s collection of alcohol. In his adult years, he sniffed cocaine, smoked weed and did other kinds of drugs to keep himself at bay which would only worsen his behaviour and cause him to hallucinate. Furthermore this drug abuse would serve as a weakness since it’s not effects alter his behaviour and triggers aggression. After escaping Russia, Ben was given hefty bags of marihuana to calm his post traumatic stress but this would bring back the same effects and it lead to kill a priest and a nun out of a delusion that they were under Homelander’s mind control which makes him reckless.

Powerful Toxins: Despite his resistance towards most chemical substances, extremely powerful toxins can still affect him. It has been suggested by Frenchie that Soldier Boy was knocked out by the Russians using the Novichok nerve agent, which can kill normal humans in less than a minute. The Boys later attempted to use such a gas to subdue Soldier Boy, but he was able to break free before its effects could be proven.