At what voltage depletion level do originally 1.5V alkaline batteries become pretty useless? Is it 1.2V, 1.25V or maybe 1.10V? In other words what would be your threshold for still holding on
![batteries - Function to describe alkaline battery voltage under constant current / load - Electrical Engineering Stack Exchange batteries - Function to describe alkaline battery voltage under constant current / load - Electrical Engineering Stack Exchange](https://i.stack.imgur.com/PDxkz.png)
batteries - Function to describe alkaline battery voltage under constant current / load - Electrical Engineering Stack Exchange
![Typical discharge curves and available energy for alkaline AAA batteries 3 | Download Scientific Diagram Typical discharge curves and available energy for alkaline AAA batteries 3 | Download Scientific Diagram](https://www.researchgate.net/publication/221926555/figure/fig3/AS:305214067363844@1449780112666/Typical-discharge-curves-and-available-energy-for-alkaline-AAA-batteries-3.png)
Typical discharge curves and available energy for alkaline AAA batteries 3 | Download Scientific Diagram
![This is a voltage (V) versus Time (s) graph of a standard 9 V alkaline... | Download Scientific Diagram This is a voltage (V) versus Time (s) graph of a standard 9 V alkaline... | Download Scientific Diagram](https://www.researchgate.net/publication/40451224/figure/fig2/AS:601700301807631@1520467939690/This-is-a-voltage-V-versus-Time-s-graph-of-a-standard-9-V-alkaline-battery.png)
This is a voltage (V) versus Time (s) graph of a standard 9 V alkaline... | Download Scientific Diagram
![Chart showing the voltage during discharge of AA alkaline cells at 2 amps discharge current | Rechargeable batteries, Battery, Aa batteries Chart showing the voltage during discharge of AA alkaline cells at 2 amps discharge current | Rechargeable batteries, Battery, Aa batteries](https://i.pinimg.com/originals/96/d7/ea/96d7eadbbf530c0a1728cfb6d18eecd6.png)