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CT scans of 1k lithium-ion batteries show quality risks in inexpensive cells

(www.lumafield.com)
287 points jonbruner | 1 comments | 24 Sep 25 19:29 UTC | HN request time: 0.233s | source
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DenisM ◴[26 Sep 25 22:13 UTC] No.45391535[source]▶
The conclusion I drew from this is that if real capacity is much less than advertised the battery is best avoided.
replies(2): >>45392847 #>>45398895 #
1. leptons ◴[27 Sep 25 20:00 UTC] No.45398895[source]▶
A common practice by shady sellers with 18650 lithium cells is to advertise a group of 4 of them as "2000mAh", but it's the total of each cell, not the individual cell ratings. So you're really getting four 500mAh batteries, which really sucks.