A few weeks ago I got a couple of Basen 26650 4500mAh.
I tested them and got the following results:
4249 mAh at 1A and 4171 mAh at 3A discharge current. Cut off voltage 2,9V.
I was a little bit disappointed about the result because in comparison with my Heter 26650 4500mAh (4616 mAh at 1A and 4587 mAh at 3A) the capacity seems to be rather low.
I accepted that so far.
Last week another couple of Basen 26650 arrived and, as usual, I tested them as well:
4944 mAh at 1A and 4835 mAh at 3A (exactly the same equipment and condition).
At first view those two lots I got look the same but I found two differences.
1.) The top end is different in diameter and height.
2.) The weight is different.
The manufacturer specification says 95g +–1g.
The second couple I got is within this specification, but the first couple has only about 88,3g both (those have lower capacity).
The one with lower weight and capacity on the left.
Weight within specification.
Low weight
I checked the security code on the Basen homepage. All four cells are reported as genuine, but I don´t know if this is reliable.
I am not sure what to do about this. Contact Basen and/or the seller (BG)?
Can any Basen 26650 owner please give me some feedback about look and weight of their cells ?
Anyway as they are unprotected I think it is not recommended to mix the cells and use them in series !