I bought one from Amazon with a coupon for less than $8. It arrived today and there’s a 14500 900mah SOFIRN rechargeable battery inside. The battery was totally dead despite the non-conductive paper inside the tube separating it. Opened up the head and I see Sofirn’s name printed on the board. The finishing is subpar to the SP32A 2.0 that I bought on Amazon. But I can’t complain much considering that it comes with a rechargeable battery and all for under $8.