Efest IMR10440 V1 350mAh (Black)


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Official specifications:
Efest%20IMR10440%20V1%20350mAh%20(Black)-info

Internal resistance is calculated from 1A to 2A.

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I got a pile of batteries in one envelope, not the best way to ship batteries, even when they are shrink wrapped. Efest have changed their packing.

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Efest%20IMR10440%20V1%20350mAh%20(Black)-Capacity

1A is handled very well, but even 3A is possible with these IMR cells.

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Thse IMR batteries handles a high load for their size.

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Conclusion

These IMR batteries have very good performance at high loads, but the capacity is, of course, not that high.
At the current time I can only rate them acceptable, because Efest is a new company, and the batteries is not from one of the big brands.



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
Comparison to other LiIon batteries