Android Bombs are self-destruct devices created by Dr. Gero and used by the four androids that appear in the manga.
The bombs are implanted in the chest areas (apparently on the heart) and can be triggered either by the android themselves, or via a remote control. They were originally intended to keep control of the Androids, ensuring that they could easily be destroyed if they turned against their creator. The strength of the bombs seems more than that of a nuclear bomb, as Bulma is very amazed to see an abnormally large "Neutron readings" when she exclaims this to her father. It can be assumed that the bombs have the strength to destroy even Perfect Cell, as implied by Android 16's attempt at using them, though Cell himself seemed to scoff at the idea a mere bomb could destroy him after the failed attempt.
Unlike other modifications made to Android 17 and Android 18 by Dr. Gero, their Android Bombs were within Shenron's power to remove and the Android Bombs of both Android 8 and Android 16 could be surgically removed by scientists such as Dr. Flappe who was involved in Eighter's development and construction, or brilliant scientific minds like Dr. Briefs and Bulma who managed to identify 16's Android Bomb as an explosive device which they were able to remove safely.
Ninja Murasaki attempted to activate Android 8's bomb for disobeying orders by using his Android Bomb Detonator, but was stopped by Goku who broke the detonator. The bomb was later removed Android 8's body by Dr. Flappe in the anime. After its removal Goku threw it away with it unintentionally landing on Ninja Murasaki's cheek and exploded before Ninja Murasaki could remove it presumably killing him.
Android 18 threatened to activate her bomb against Cell when he tried to persuade her to be absorbed by him. She also used the same threat against Super 17 in Dragon Ball GT though this time she was buffing as she was aware it had been removed by Shenron due to Krillin's wish to remove her and her brother's bombs after the Cell Games.
In the Dragon Ball Super manga, 17 leads everyone to believe that he plans to sacrifice himself before creating an explosion near Jiren. Jiren is unfazed, and the spectators believe 17 has self-destructed with his Android Bomb. After Frieza ring-outs himself, Jiren, and Goku simultaneously, it is revealed that 17 was hiding following the explosion, and that the entire plan was devised by himself and Frieza previously. As the winner of the tournament, he reminds Krillin that he lost the ability to use his bomb after it was wished away by Krillin himself years ago.
- Self Destruct Device - Android 16's version of the Android Bomb which was originally created to be used on Goku, though due to Android 16 being created in the image of Dr. Gero's deceased son Gebo, Dr. Gero couldn't bare the thought of seeing Android 16 destroyed which lead the doctor to reprogram 16 to be non-aggressive before ultimately deciding not to deploy him against Goku. Android 16 attempted to use this technique to kill Cell, but unfortunately it had been removed by Bulma and her father while they were repairing 16.
Video Game Appearances
The bomb activates whenever Android 16's Ultimate Blast is used.
In Dragon Ball: Origins 2, their is a side mission where Android 8 visits Senbei Norimaki in Penguin Village to have his Android Bomb removed by him instead of Dr. Flappe like in the anime. Presumably the side mission is a potential explanation for its removal that never occurred in the manga as Dr. Flappe's entire appearance in the anime was filler material.
In Dragon Ball FighterZ, the reconstructed Android 16 has the ability to self-destruct as a last resort though due to gameplay mechanics is functions as a form of False Self Destruction as Android 16 survives the detonation though it reduces his health and can only be used once per battle.
In Dragon Ball Z: Kakarot, Bulma and Dr. Brief remove Android 16's Android Bomb while repairing him, resulting in his attempted use of his Self Destruct Device to destroy Cell to fail during the Cell Games much like in the main series. Additionally RR Mech Soldiers, RR Mech Generals, RR Mech Commanders, and their variants are capable of activating their Android Bomb to Self Destruct which they will tend to resort to when their health is low. However bombs used by these robots are much weaker than the ones used by the more advanced Red Ribbon Androids.