Summary of Atmega Rechargeable Battery Capacity Tester using ATMega168 microcontroller
This article describes a rechargeable battery capacity tester built around the ATMega168 microcontroller. The device discharges batteries while monitoring voltage to calculate total capacity and display runtime until a low-battery threshold is reached. It supports testing multiple cells individually and features an LCD for result display, automatically disconnecting the load when the cutoff voltage is met.
Parts used in the Rechargeable Battery Capacity Tester:
- ATMega168 microcontroller
- LCD display
- Battery cells
- Voltage monitoring circuitry
- Low battery indicator
- Load connection
This ATMega168-based battery tester allows you to find out the overall capacity of the rechargeable battery. It can shows how long will a battery last from the time it’s fully charged to the time that the “low battery” indicator comes on your device. It can be used to test multiple cells individually, and display the results on an LCD.
The tester discharges the battery while monitoring the voltage of the batteries. When the low threshold is reached, that cell is done it disconnects the load from the battery.
For more detail: Rechargeable Battery Capacity Tester using ATMega168 microcontroller
- What is the primary function of this project?
The project finds out the overall capacity of a rechargeable battery. - How does the tester determine when a battery is finished?
It disconnects the load when the low threshold voltage is reached. - Can this device test multiple batteries at once?
Yes, it can be used to test multiple cells individually. - Where are the test results displayed?
The results are displayed on an LCD screen. - What happens to the load when the low threshold is reached?
The tester disconnects the load from the battery. - Does the device measure how long a battery lasts?
Yes, it shows how long a battery lasts from fully charged to the low battery indicator. - What component controls the operation of the tester?
An ATMega168 microcontroller is used to control the tester.

