Lithium-ion batteries dominate passenger EVs and premium e-bikes, but in low-speed electric vehicles (LSEVs)—including e-bikes, cargo tricycles and neighborhood quadricycles—lead-acid remains the default choice in 2026. Industry data shows lead-acid still powers over 65% of China’s original-equipmen

The global lithium battery market keeps climbing, yet one quiet cost trap is widening for procurement teams: cell grading chaos. With no mandatory national standard defining “Grade A” or “Grade B,” the same label can hide fresh top-tier cells, overstock A-, factory B-stock, or even refurbished code-

Industry repair records and battery-makers’ technical bulletins show the premature fade of lead-acid packs in e-bikes and scooters is rarely a quality defect. The real drivers are avoidable habits: plate sulfation, electrolyte water loss, deep discharge and overnight overcharge. Sulfation builds whe