Huizhou

Bluetooth Speakers

The same Shenzhen or Dongguan factory that builds a speaker distorting badly above 60% volume can, on a different line, build one that genuinely holds its own against established retail brands — the hardware base is that mature, and the gap between good and bad is almost entirely tuning decisions nobody puts in the listing. Pricing across the category runs from $3.50 to $95 FOB, and the real differentiators — driver quality, DSP tuning, amplifier class and chip choice — don't show up on a spec sheet at all. What does show up, if you know where to look, is battery capacity (commonly overstated, sometimes by half), IPX rating (frequently claimed higher than it tests), and Bluetooth chip tier, where the jump from a generic chip to a Qualcomm part costs $0.80 to $2.50 more per unit but changes pairing stability and codec support noticeably. A factory that welcomes a blind listening test and a pressure-chamber water test on samples is telling you something about how confident it is in its own numbers; one that stalls on either request usually has a reason.

Power Banks

Power banks are one of the few categories here where a quality shortcut isn't just a customer-complaint risk — it's a fire risk, and that changes how seriously the sourcing process needs to be taken. The cells, the battery management system and the charging circuit all have to work together properly, and a factory cutting cost on any one of them — recycled cells, an undersized BMS, a charging IC that skips overcharge protection — is cutting cost on the part of the product that can genuinely go wrong. Shenzhen and Dongguan dominate production, with pricing from $2.80 for basic units to $65 for high-capacity fast-charging power stations. Capacity claims are the most consistently exaggerated number in the category. A 10,000 mAh power bank can only ever deliver a fraction of that at 5V output once voltage-conversion losses are accounted for, and the honest factories are upfront about that physics rather than pretending otherwise. UN38.3 certification isn't optional if the product is going by air, and it's worth verifying the certificate directly with the testing lab rather than trusting a document a factory hands over, since fabricated reports do circulate. Cell brand matters more here than almost anywhere else in electronics sourcing — the gap between a recognised cell brand and an unbranded one shows up in cycle life long before it shows up in day-one capacity.