A123 26650 2500mAh (Green)

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This is a battery that can deliver very high amount of power!

Official specifications:

The above current rating is much lower than the A123 datasheet is says: 70A continuous and 120A pulse.

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This battery is rated for 2500mAh (in A123 datasheet) and will deliver it, even at a 30A load, but the voltage is lower than the normal LiCoO2 batteries.

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On this battery the body is the plus connection.

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Same capacity at any load and very constant voltage during discharge, but the price for the high current ability is capacity.

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I have used the same 1A charging current as I do for most other batteries. This battery is designed for much faster charging, recommend charge current is 2.5A and max. charge current is 10A for a 12 minutes charge to 80% capacity.


Conclusion

This battery uses a "safe" chemistry, but this does not make the battery safe, any battery that can deliver 120A has to be very careful treated.
This is a very interesting battery for some applications, but due to the low voltage it is not really good for flashlights (leds need a lower Vf).
This battery can only rate as very good.



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