Efest IMR10440 V1 350mAh (Black)




Official specifications:

• Brand /model: Efest IMR 10440 350mAh 3.7V
• spec: LiMn 10440 350mAh 3.7V
• Material: IMR(LiMn)

Internal resistance is calculated from 1A to 2A.



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.








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











Thse IMR batteries handles a high load for their size.





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