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Tag: ready to use nimh

AA Battery Discharge Curves

AA Battery Discharge Curves

I am starting to collect data on different AA batteries at different discharge rates with the Arduino battery data collection system that I designed. If you would like a specific battery tested at a specific current, please contact me on the contact page.

The first data set is of Rayovac Ready-to-use rechargeable NiMh batteries discharged at a constant 50mA: (The Vertical axis is voltage, the batteries are freshly charged)

Click image for larger graph. From the data taken discharging the Royovac NiMh batteries to 1.1V the capacity yield is about 1300 mAh

Rayovac ready-to-use rechargeable NiMh discharge curve at 50mA
Rayovac ready-to-use rechargeable NiMh discharge curve at 50mA

 

 

 

 

 

 

 

 

 

 

 

 

 

 

The next data set is from Costco Kirkland AA alkaline batteries:

Click image for larger graph. From the data taken discharging the Kirkland Alkaline batteries to 1.1V the capacity yield is about 2200 mAh

Costco Kirkland AA Alkaline discharge curve at 50mA
Costco Kirkland AA Alkaline discharge curve at 50mA