Overclocked
Member
Is it possible to calculate how long a device will last on a battery? For example, I have a device that consumes 20mA. The battery supplies 1500mAH (mA per hour). how can you calculate how long the battery will last before you have to recharge it (ie, time, how many hours)?
Im guessing you divide 1500/20ma (1500mAH would be 1.5Amps per hour right?) to get 75 hours?
(I used google
https://www.google.com/search?sourc...F-8&rls=GGGL,GGGL:2006-19,GGGL:en&q=1.5/20e-3)
Note: the 20mA Is just an example figure, its not something I was planning on using. Then again, a Blue LED takes about that much current (excluding the resistor)
Im guessing you divide 1500/20ma (1500mAH would be 1.5Amps per hour right?) to get 75 hours?
(I used google
https://www.google.com/search?sourc...F-8&rls=GGGL,GGGL:2006-19,GGGL:en&q=1.5/20e-3)
Note: the 20mA Is just an example figure, its not something I was planning on using. Then again, a Blue LED takes about that much current (excluding the resistor)