3.7v to 3.3v (with picture) - Motors, Mechanics, Power and CNC - Arduino Forum
It Just Got Easier to Convert Lithium-Ion Battery Voltage to 3.3V with this Efficient Single Inductor Synchronous Buck-Boost Regulator | Analog Devices
EEMB 3.7V 820mAh Lipo-Akku 653042 Wiederaufladbarer Lithium-Polymer-Ionen-Akku mit JST-Anschluss.Stellen Sie sicher, DASS die Polarität des Geräts vor dem Kauf mit Batterie übereinstimmt!!!: Amazon.de: Elektronik & Foto
It Just Got Easier to Convert Lithium-Ion Battery Voltage to 3.3V with this Efficient Single Inductor Synchronous Buck-Boost Regulator | Analog Devices
LiPO charger / boost converter 5V 3.3V outputs from ceech on Tindie
3.3V constant from LiPo battery. Inexpensive and simple circuit / chip? - General Electronics - Arduino Forum
Adafruit Micro Lipo w/MicroUSB Jack - USB LiIon/LiPoly charger: Amazon.de: Elektronik & Foto
Solved] Switching off DC/DC converter output when charging, USB LiPo charging circuit - Projects - KiCad.info Forums
How Setup an efficient and safety Lipo Battery with Esp32/Esp8266 Modules? - General Electronics - Arduino Forum