Everything old is new again.

A project log for Minimalist Li-Ion Discharger/Capacity meter.

What you need to grade your scavenged cells for building balanced packs.

Daren SchwenkeDaren Schwenke 02/06/2019 at 18:540 Comments

Still continuing to cycle the cells a second time.  Still all going up in mAh value, save one which went down 30mAh.

10 cells left to do.

Ordered some Li-ion charger PCB and 18650 battery holders from Amazon.  Both were 10 for $9, and will let me charge 10 at a time, at 1A.  That should give me some more options for cycling cells I'm questioning, without being so darn slow.

<EDIT>  Cell charger done.   I wish I had done that way sooner... </EDIT>

Also built a cell welder and tested it.

Works well, but you have to be careful to keep the pulse duration short, as shown on my test cell here where I burned through.