Thread: Jupmstarting 18650's

All cells can do it, I've had to Panasonic 3600mA protected cells arrive in the dead state never to be resurrected again. Replaced no questions asked, and on opening up they appeared fully legit just absolutely zero volts across the cell when measuring without the protection circuit on the bum in the way. The -ve casing was correctly marked and the inner poo and plate looked legit to me, but who knows?

Originally Posted by No.3

All cells can do it, I've had to Panasonic 3600mA protected cells arrive in the dead state never to be resurrected again. Replaced no questions asked, and on opening up they appeared fully legit just absolutely zero volts across the cell when measuring without the protection circuit on the bum in the way. The casing was correctly marked and the inner poo and plate looked legit to me, but who knows?

Protected cells are entirely different because often the PCB is the cause with high parasitic drain. I've imported thousands of unprotected cells from Sony, LG, Panasonic, Sanyo, and Samsung over the years and never have I received a discharged cell. I have one of the best quality control checks in the world, everything is tested upon arrival and then again before shipping to a customer. I even purchased a professional Computerized Battery Analyzer to confirm authenticity of all cells I import. Customer safety is extremely important to me.

Originally Posted by Night_Into_Day

Protected cells are entirely different because often the PCB is the cause with high parasitic drain. I've imported thousands of unprotected cells from Sony, LG, Panasonic, Sanyo, and Samsung over the years and never have I received a discharged cell. I have one of the best quality control checks in the world, everything is tested upon arrival and then again before shipping to a customer. I even purchased a professional Computerized Battery Analyzer to confirm authenticity of all cells I import. Customer safety is extremely important to me.

Yep, correct - the unprotected cells (aka scavenged cells out of laptops etc) are not the usual culprits for the zero voltage gig unless they are coosed. Interesting how many packed battery units I've been into that the BMS is crook in, weak point in the system...