Green’s Dictionary of Slang

charger n.¹

the penis.

1867		Rosa Fielding 17: [G]getting his charger well in hand, he put his head straight for the gap.
1884		Randiana on asstr.org 🌐 She heaved up her buttocks and felt my charger rush up to the very extremes of her burning sheath.
1904		Lustful Memoirs of a Young and Passionated Girl 26: He got between her legs again and surprised Julia by easily shoving his charger into her without hurting her any. [Ibid.] 59: I seized hold of his charger and directed it to the portals of my heaven of bliss.