A laminated glazing comprising an SPD ply comprising a suspended particle device having a low light transmission off-state and a high light transmission on-state, at least one interlayer ply comprising an interlayer material, and at least one glazing ply is disclosed. The electronic device may include a first side and a second side. First and second doped regions are provided proximate the upper surface of the substrate. At least one of the tamper blocks comprises a state machine whose operation is controlled by way of user-programmable registers. The connector or the voltage converter, disposed between an inverter and a lamp set, receives low-voltage signals generated by the inverter, performs voltage conversion, and outputs high-voltage signals for driving the lamp set. Thereby, the charger substantially prevents the charging signal from exceeding the battery gassing potential during the charging process.