Yup, seemingly no guarantee of quality, but when they're very cheap I'm not fussed.
My battery* has been fine for the last 6 years, but the bike gets used regularly. Only bike I've ever considered fitting an Optimate to was a Caponord, by virtue of it being Aprilia and therefore ****e electrics**.


*that should jinx it, I'll order the new one now shall i?
**and they were; in the 6 months/6k miles I owned it it had new HT leads, plugs, battery, reg/rect, starter solenoid...