Jeti RFID Battery-logger

onki wrote: Hi Thorn,

The first link shows a Mifare S50 type tag, the other one is a Mifare 1k classic type.
It seems to be the newer, updated version of the classic 1k since the classic 1k is not that secure.
AFAIK is the S50 compatible with the classic type.
Both stickers will not work reliably on a LiPo as you need to add a thick double tape to get a bit of a distance from the metal.

Best regards
Onki

About placing tags to batteries

RFID works with radio-frequencies and as we know they don’t like metal that much. Same applies here. We are using the most inexpensive tags so they are thin and that means the “antenna” in tag is right on to metal when you fasten it on the battery. There needs to be a little bit of distance between battery and tag. This is easily done with a piece of sot two-sided tape (Ebay example here) between tag and battery.

With no battery reading distance is ~3cm, with tag straight on the battery sensor does not read the tag at all. With a piece of foam-tape reading distance is around 1cm which works fine.

Another alternative is to use “anti-metal”-defined tags, they are a bit more expensive. (Example Ebay-link here)