Jonwil, hi. If you are looking at so-called "genuine" bl5js the counterfeiters are very good with faking the holograms.

Pisen 1400mAh batteries under $10 shipped. They might not say 1400mAh (on the ad it might say 1320mAh) but what turns up are labelled 1500mAh 1400mAh.. Pisenexport and pisenelectronic are factory sellers. I have bought from them both. These are tested by me to be 1500mAh cells and of very high quality. HTH