What is your target audience or use case? Because the obvious choice would be illegal items, which are excluded by your TOS. And while privacy enthusiasts are willing to spend extra, your asking price is too steep for casual use.
I noticed the pricing page is entirely dollar nominated, with the only payment option listed “cash on delivery”, listing a bunch of typical payment options. Monero is only mentioned as a feature on the usage and FAQ tab, and both are easy to miss. Initially I wondered why you were posting here if you only accept paypal and such.
Batteries have one advantage over over supplies: extremely low noise. Even an good LDO will bump up the noise floor, and a cheap lcsc part will do so too. Plus you’s want a reasonably low dropout and quiescent current, which also increases price. Maybe 10ct in volume is reasonable for such a part - and yes, that will absolutely eat the margin