I found a too-good-to-be-true price on some new 2200MAh 18650 batteries on eBay, said to be Sanyo UR18650A
- the pink/red sleeve is impressed with "Japan M36A"
- there are two other strings printed in large digits made of dots: MHIA2B, with a 6 digit number below - a different one on each battery; also a small bold B. I think these are printed on the sleeve, but can't be sure that they aren't showing through.
- there are numbers printed about the periphery of the bottom of the cell, a different number and pattern of the number on each one.
- there is a purple ring around the positive terminal
- no other ID marking on the sleeve, specifically no "Sanyo" or "UR18650A"
Can anyone shed any light on these? Googling MHIA2B doesn't return any answers. My first thought was that these were just being fobbed off as Sanyo, but I can't really tell from what little I know. If the embossed string can be taken to be a Sanyo date code, these appear to be from 2008.
If these are indeed that old - NOS - is it safe to use them in a high drain application? Current Sanyo UR18650A cells seem to be rated to 4.3A.