Y yellow Flashlight Enthusiast Joined Oct 31, 2002 Messages 4,680 Location Baden.at Dec 31, 2019 #1 they usually are single cell li-ion, why 4 then? :thinking:
archimedes Flashaholic Joined Nov 12, 2010 Messages 15,780 Location CONUS, top left Dec 31, 2019 #2 The 3rd/4th terminal(s) are for monitoring. Part of the safety system.
L LED Monkey Enlightened Joined Apr 25, 2016 Messages 281 Location Massachusetts Dec 31, 2019 #3 they provide more info to the phone like temperature, current, capacity etc...
PhotonWrangler Flashaholic Joined Oct 19, 2003 Messages 14,963 Location In a handbasket Dec 31, 2019 #4 What Archimedes and LED Monkey said. In addition, in at least one case the NFC antenna is actually in the battery and needs a contact pin for it.
What Archimedes and LED Monkey said. In addition, in at least one case the NFC antenna is actually in the battery and needs a contact pin for it.