mini motion sensor lamp

I've created a night light holder for the Motion Sensor HC-SR501 & 5 mm LED

Here are the parts:

5mm LED * 4

DC-DC 5V output

HC-SR501 PIR MOTION DETECTOR

3.7V 14500 battery

100Ω，Ohm * 1

10KΩ，Ohm * 1

2N3904 transistor * 1