Use MC34063 to do 3.6V electric 9V circuit diagram

MOS power IC full range

Probe domestic switch needle KG-300K needle head diameter is 3.0mm normally open switch needle

inductance

SMD aluminum electrolytic capacitor

Working status:
No load:
Input: 3.65V, 18uA (approximately 600mAH battery standby for more than three years)
Loaded:
Output: 9.88V, 50.2mA, input: 3.65V, 186.7mA, efficiency is 72%

working principle:
When there is no load, the IC 6 has no power and stops working. The input current of 3.65V is only 18uA (the battery of 600mAH is more than three years standby)!
When there is load (Q1 has Ieb current), the EC pole of 8550 is turned on, and the IC is energized.
Whether the IC works is determined by whether there is load or not, it is equivalent to a battery.

With the IC for high voltage conversion efficiency, the output is stable!
This circuit is improved by adding power to the "4.2V to 5V mobile power supply without switching." You can use a battery box to make backup power for your phone!

Circuit diagram My inductance is about 30 在 on a 1 cm I-core with a 0.3 mm wire. I think this core is too big, and his space has not been halfway.