The average electronics SKU is small, expensive, and breakable in ways the customer cannot fix. A pair of $200 wireless earbuds delivered with a static-zapped chipset works for 3 days then fails — that is a warranty claim, a return shipping cost, and a CS ticket. A 3PL that runs electronics without ESD discipline at every workstation is rolling the dice on every order, and the failure rate does not show up until 60 days after ship.
Lithium-ion batteries are the second non-negotiable. Every unit with a battery — phones, laptops, wearables, smart speakers, vape devices, e-bikes — triggers UN 3480 (battery alone) or UN 3481 (battery installed in equipment) hazmat handling. The carrier requires a DG declaration on every parcel. International shipments need full IATA paperwork. A packer who does not know the SKU is lithium-flagged ships a non-compliant parcel that gets refused at the carrier hub or seized at customs.
Channel mix in electronics leans on Amazon as the dominant revenue line, then Shopify DTC, then big-box retail (Best Buy, Target, Costco). Wholesale into retail means GS1-128 labels, EDI 850 / 856 / 810, and serial-number reporting on every shipped unit so the retailer can warranty-track. Multi-channel inventory pools have to maintain serial-level traceability across all four channels or warranty registration breaks the moment a customer buys at Best Buy and registers at the brand website.