Dual 18650 Li-Ion Battery Charger -...
LTC3108 Ultra Low Voltage Step Up Converter (Input from 20 mV)
The product is useful in a wide range of applications and is small in size. It can be easily used in spaces without good ventilation at currents up to 2.5A. Careful! The output voltage must be at least 1.5V higher than the input voltage.
The product is a switching voltage source in boost type topology with a yield of up to 96%. This yields it to scatter very little energy and not to heat it until it is at full capacity. The source is very small and is useful in your projects where you want to power 5V circuits with single-cell batteries or accumulators.
The compact (0.32″×0.515″) U3V12F5 switching step-up (or boost) voltage regulator takes an input voltage as low as 2.5 V and efficiently boosts it to 5 V. The pins have a 0.1″ spacing, making this board compatible with standard solderless breadboards and perfboards.