I need to choose a battery pack for a project I am working on. The stand by current is 40mA and the operating current can go as high as 2Amps albeit for less than a second.
In the past I have used batteries purchased over the counter but it has dawned on me that possibly often the battery is an overkill.
I understand the connection of cells in series and parallel, and a battery has a Ah capacity which determines your back up time.
What I am trying now to find out is how I use a battery and what I look for. I know I can join 4 x 3.7 Volt AA cells together to get 14.8 Volts but I cant run a high current drawing device from it. So I want to understand when looking at a battery just what I must be looking for. Then How to work out the back up time .
In the past I have used batteries purchased over the counter but it has dawned on me that possibly often the battery is an overkill.
I understand the connection of cells in series and parallel, and a battery has a Ah capacity which determines your back up time.
What I am trying now to find out is how I use a battery and what I look for. I know I can join 4 x 3.7 Volt AA cells together to get 14.8 Volts but I cant run a high current drawing device from it. So I want to understand when looking at a battery just what I must be looking for. Then How to work out the back up time .