See how to create your own 1.5V lithium-ion battery with this DIY guide. Learn the steps to assemble a rechargeable battery and enhance your projects with custom power solutions.

For the cell phone to charge, charger output must be above 4V and can deliver a maximum current of 500mA. This charger circuit will step up the voltage from 1.5V to 5V DC to reach the cell phone ...

The chip is a boost converter with a startup voltage of just 0.65V, which means the batteries themselves – normally starting life above 1.5V – can be used until they drop to about 0.3V each.