A123 18650 1100mAh (Yellow)

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

Official specifications:
A123%2018650%201100mAh%20(Yellow)-info

This battery has a lower voltage than the usual LiCoO2 batteries and also much lower capacity.

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A123%2018650%201100mAh%20(Yellow)-Capacity

There is not much capacity, but the capacity is available at very high currents.

A123%2018650%201100mAh%20(Yellow)-CapacityTimeHours

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The battery is able to deliver 30A, but only for two minutes!

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A123%2018650%201100mAh%20(Yellow)-TripCurrent

The battery has no protection and I discharged it before I was finished with this test.

A123%2018650%201100mAh%20(Yellow)-Charge

I only uses a 1A charger current, the battery can be fast charged with a 4A current.



Conclusion

This battery uses a "safe" chemistry, but this does not make the battery completely safe due to the high currents it can deliver.
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 a 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