Originally Posted by gbjbasdw
I've never come across a battery that had a PCD with it. Can you point me to a web link so I can have a look please.
Syma S107s have them ... so do most of the 6010s. From what I'm hearing, any heli that uses a USB charger better have a charging protection PCB on the LiPo to prevent over charging and ruining the battery in short time.
You have to look very closely at the top of the battery where the power wired come out to see the PCB buried in the top of the battery.