A light polymerization device for polymerization of a polymerizable material includes a hand-held device having a multi-branch electrical supply receptacle or a multi-prong electrical supply plug for the connection of the hand-held device with the storage battery assembly or with a connection module, which, in particular, makes available a releasably connectable electrical supply connection as well as a data bus port or interface. A base station comprises a single receptacle or several receptacles for the receipt of the storage battery assembly. The base station can comprise an electrical supply plug connection via which the base station is supplied with electrical energy, especially electrical energy supplied via a power pack.