Cheap authentic battery packs to harvest 18650 cells

Let-There-Be-Light wrote:

The same color. They have the purple ring on the top. and no markings that Google has seen. Actually, now that this thread is going Google will know what a NLKA58 NLKA58 NLKA58 NLKA58 is hopefully? Thank you very much Sir! Mine have 6 vent holes if that’s the little holes around the top. You mention “engraved marking” on the wrap. Mine have none. I’m near sighted and looked at them a lot under a bright light. TY for clearing up my mystery. You probably saw how long your son’s laptop was lasting on battery and set his power options to High Performance, then when he complained bought him a new pack so you could have the good one to tear down

Most Sanyo's have label on the wrapper that is hard to see. It looks a bit like a water mark. It will be 3 parts "SANYO x" "UR18650xx" and a "date code". The label goes along the length of the cell. Some Sanyo's don't have a label. Here is an example. Date code is too low to see.