flashlight...

Hello All! Found a subject on batteries... Written Electronics V6-03... Doesn't work... I took it apart - there are 3 D-0.26D-11 batteries, a 470n capacitor and an unknown burnt part. This part is a white ceramic plate with 4 contacts, 2 go directly to 220V, and 2 to + and - of the battery. A The capacitor is connected between the + battery and one 220V contact. This unidentified part has a stripe burned into it and is not in any direction. calls. What could this be? The diagram clearly looks like a bridge, but if it the bridge will run on 220V batteries. Or was there a resistor in this part? What other charging scheme is there for 3 pieces of D-0.26D-11? PS. By the way, how long does the subject work with charged batteries? Best regards, Evgeniy.