VERTER 5V USB Buck-Boost - 500mA from 3V-5V / 1000ma from 5V-12V [TPS63060] : ID 2190 : $9.95 : Adafruit Industries, Unique & fun DIY electronics and kits
Adafruit Industries PowerBoost 1000 Basic 5V USB Boost @ 1000mA from 1.8V+ - Micro Center
VERTER 5V USB Buck-Boost - 500mA from 3V-5V / 1000ma from 5V-12V [TPS63060] : ID 2190 : $9.95 : Adafruit Industries, Unique & fun DIY electronics and kits
TLV62569 3.3V Buck Converter Breakout - 3.3V Output 1.2A Max | The Pi Hut
Adafruit LM3671 3,3V Voltage Controller/Buck Converter Breakout, 600mA Max 2745 | eBay
PowerBoost 500 Basic - 5V USB Boost @ 500mA from 1.8V - Melopero Electronics
DC Buck-Boost VERTER 5V USB 500mA from 3V-5V 1000ma from 5V-12V Philippines | Circuitrocks – circuitrocks
VERTER 5V USB Buck-Boost - 500mA from 3V-5V / 1000ma from 5V-12V [TPS63060] : ID 2190 : $9.95 : Adafruit Industries, Unique & fun DIY electronics and kits
PowerBoost 500 Basic - 5V USB Boost @ 500mA from 1.8V+ : ID 1903 : $9.95 : Adafruit Industries, Unique & fun DIY electronics and kits