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Ok, success! I managed to discharge and recharge 4 cells. To discharge, i drove 3 computer fans in parallel off the pack. The controller properly turned off at about 3.5 V to prevent over-discharge. That's a pretty high cutoff, i've read the cells can be discharged to 2.5 V without problem...

I might be wrong, but i don't think they ever put the pcb inside the batteries. Just chemicals :) Anyway, today i had success charging and recharging these batteries, with an EXTERNAL charger. They appear to work as li-ions, without any explosions (even tho their protection pcb's are phony)...

no, i'm not here to politicize, i'm here to get technical answers to technical questions. The photo of the pcb with parts, in case you did not bother to visit the link i provided, is a generic photo from the link i provided, showing how round pcb's are connected to protected cells. I provided...

i'm using 19v. the datasheet says "Wide operating voltage range 2 V to 24 V"

how do you cut open a pcb? as i said, the pcb's on these batteries are identical to the pcb's in the listing of fake pcb's. Look at the photo. There are no components on the pcb. yes, i don't know why these chinese producers bother, when it seems it would be about the same cost and effort to...

sorry, i don't follow you. This battery has a dummy pcb, just as shown in the links above. There are no fets. What do you mean? what's a shorting run? there are no components on these pcb's, just blanks. i did not say i wrote that article. i'm guessing english is not your first language? thx...

there's no fet or diode, only the chip, but as i explained above, the chip is fake. there is no load.

The product page says: "Input volt (between B+ / B- VSS-0.3~VSS+26 V" see op

ha, the vendor just gave me a full refund, when i asked why it charged past 4.2 v. He said "occasional bad battery!". what the....? i found this "false plates without any protection function". They are identical to the plates on the bottoms of these batteries. http://bit.ly/1dfEL0K Question...

link to full explanation and more pix: http://www.lygte-info.dk/info/battery%20protection%20UK.html

this is how they are assembled:

Ok, i know you guys are going to laugh at me for even attmpting to do this, but here goes: i purchased this battery. from a us-based vendor. http://r.ebay.com/TNTDiK i checked the battery voltages on delivery. All were about 3.7 volts. Good sign. i peeled away the base of one of the...

it's the 8254AA http://www.sii-ic.com/en/semicon/datasheets/power-management-ic/lithium-ion-battery-protection-ic/s-8254a/ http://datasheet.sii-ic.com/en/battery_protection/S8254A_E.pdf

how do you know it requires 24V? the chip is one of: S-8243A/B S-8254A S-8204A S-8204B S-8225A S-8225B S-8205A/B (trying to determine which) datasheets are here: http://www.sii-ic.com/en/semicon/products/power-management-ic/lithium-ion-battery-protection-ic/

I'm trying to charge 4 x #18650 4.2V 4.5Ah Li-Ion batteries. Like these: http://r.ebay.com/zu9OjA i'm using this charger: http://r.ebay.com/6hk1Op This charger does not appear to be working. Surely my own error. When i charge some good 18650's (not full, but have at least 3V charge), i do not...