Introduction: DIY Emergency Power Bank With AA Batteries and USB DC Voltage Step-up Boost Module

DIY Emergency Power Bank with AA Batteries and USB DC Voltage Step-up Boost Module

An AA battery is a standard size of a single cell cylindrical dry battery. AA batteries are commonly used in portable electronic devices. An AA battery is composed of a single electrochemical cell that may be either a primary battery (disposable) or a rechargeable battery. The exact terminal voltage and capacity of an AA size battery depends on the cell chemistry. AA batteries account for over 50% of general battery sales and i can buy it anywhere

More Homemade External Power Bank Backup Battery for Smart Phone here:


holymoses (author)2015-07-17

This module is fine, but you should never use it with more than a single Secondary Battery, and only if you trust in it´s feature to turn of reaching 0.9V, as a rechargeable one could get deeply discharged.

For deeply exploiting Primaries it is great!