Patent ID: 6940257

Claim:
A battery charger comprising: (A) a primary circuit including a series connection of: (1) a primary coil of a transformer, (2) a main power switch, (3) a relay, and (4) a primary coil switch activated by said relay in accordance with specific charge conditions, (B) a secondary circuit including: (1) a secondary transformer coil of the transformer, (2) a rectifier connected with the secondary transformer coil, and (3) an overcharge prevention circuit including: (i) a voltage sensitive switch connected to said primary coil switch, and (ii) an activating circuit for activating a start of a loading process for fully discharged batteries, said activating circuit including a contact switch in parallel with said relay and which one of: (a) activates said relay, and (b) temporarily takes said relay out of service, (C) at least one reactance which defines a current intensity of the primary circuit, the at least one reactance being connected one of: (1) in the primary circuit, and (2) between the transformer and the rectifier in the secondary circuit, and (D) charge terminals connected with the primary and secondary circuits.