AASaver is a versatile voltage booster for AA/AAA batteries. It can be used for USB charging, LiPo charging, as LED flashlights, and 5V / 3.3V selectable breadboard power supply, all from just two AA/AAA batteries. It works with either new or used batteries (hence the name ‘saver’!)
The current version is AASaver 2.1, with on-board 5V / 3.3V output voltage selector. Check the AASaver 2.1 User Manual for details.
- Operating voltage: startup voltage 0.9V.
- Output current: 500mA @ 5V maximum (actual maximum output current depends on battery condition); 250mA @ 3.3V.
- Input source: Either two AA/AAA batteries, or an external 3.7V LiPo battery (selectable by an on-board switch). Can also be modified to work with a single battery, or with a solar cell.
- Output components: Any of the following: flashlight LEDs (seletable by a switch), breadboard pin headers, USB, or LiPo charger. The LiPo charging current is adjustable from 10mA to 220mA through an on-board trimmer.