Author name: Wang Zhenfei

Wang Zhenfei is the founder and CEO of YHR Technology, a consumer electronics OEM/ODM manufacturer based in Dongguan, China, with more than 200 staff and 30+ private-model projects delivered. He works directly with brand owners and distributors across the smart glasses, portable power, and wearable audio categories — from product definition and tooling to certification and mass production. The insights shared in this blog come from real factory floors, real production lines, and real OEM projects — not rewritten press releases.

Power Bank Lifespan by Capacity and Brand: What Warranties Really Tell You

Wang Zhenfei / 2026年10月13日

Power Bank Lifespan by Capacity and Brand: What Warranties Really Tell You A buyer once showed me two quotations for

power bank cycle life and calendar age comparison

How Long Do Power Banks Last? Cell Cycles, Calendar Life, and Replacement Signs

Wang Zhenfei / 2026年10月13日

How Long Do Power Banks Last? Cell Cycles, Calendar Life, and Replacement Signs When people tour our factory, they always

4000mAh vs 20000mAh power bank extremes comparison

4000mAh vs 20000mAh: The Two Extremes of Portable Power

Wang Zhenfei / 2026年10月13日

4000mAh vs 20000mAh: The Two Extremes of Portable Power The most useful power bank I own is also the cheapest

Power bank charging a MacBook Air via USB-C on a wooden desk

Can a Power Bank Charge a Laptop? The Wattage Rules You Need to Know

Wang Zhenfei / 2026年10月11日

Can a Power Bank Charge a Laptop? The Wattage Rules You Need to Know Yes — a modern power bank

Black power bank with USB-C cable charging a laptop on a walnut desk

How Long Does It Take to Charge a Power Bank? Real Numbers From a Factory Floor

Wang Zhenfei / 2026年10月11日

How Long Does It Take to Charge a Power Bank? Real Numbers From a Factory Floor Every buyer asks the