Unknown RCR123A 3.0V 500mAh (Blue)
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Official specifications:
- Battery Capacity (Mfg Rated): 500 mAh
- Battery Chemistry: LiFePO4
- Battery Feature: Rechargeable
- Battery Form Factor: CR123A
- Battery Rated Voltage: 3 V
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This is IFR batteries, i.e. LiFePo4 with a maximum charge voltage of 3.6 volt.
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The battery is very good at handling high currents, but there is a some difference in capacity.
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The charge curve is a typical LiFePo4 charge curve (Voltage drops from 3.6 to 3.4 volt when charge is terminated).
Conclusion
This battery is good for a cheap battery and also very good compared to some other IFR batteries.
Notes and links
How is the test done and how to read the charts
How is a protected LiIon battery constructed
More about button top and flat top batteries
CR123A and rechargeable substitutes