Can these be for real? Five pcs for $1.69: http://www.ebay.com/itm/201574969988
I have a pile of 386 amps but I gotta try these out, that price seems cheaper than free. Small board.
Another noteworthy tiny board (practically microscopic at about 1/8" x 5/8"), is this 29-cent (OK, ten pcs for $2.89) Li-Ion battery protection chip, which claims to do it all. Overcharge protection, over-discharge protection, short circuit protection, overcurrent protection. I just got these in, will test soon. http://www.ebay.com/itm/162025038275