Amazon.com: ALAMSCN 3.3V 5V MB102 Solderless Breadboard Power Supply Module with 9V Battery Clip Power Cable 2.1x 5.5mm Male DC Jack Plug for Arduino (Pack of 3) : Electronics
16340 Micro USB Power Bank Battery Charger Module Dual Output 3.3V 5V Rechargeable Battery Holder
Emmerich ULT-18650-FP-ULF Non-standard battery (rechargeable) 18650 U solder tab LiFePO4 3.3 V 1250 mAh | Conrad.com
Amazon.com : 2 Pack - Replacement for Pentaxist D Battery - Compatible with Pentax CR-V3 Digital Camera Battery (1300mAh 3.3V Lithium-Ion) : Electronics