xiuqiyu 2-Pack 5.0Ah 100% True Capacity & Automotive Power Cell Replacement Battery
Tier Bby xiuqiyu
This battery is not for high-power applications, but it's absolutely solid. Fantastic construction, actually exceeds its stated capacity, and no safety issues. Nearly identical to the Lidaiax and Menssda packs, their low-current cells cannot sustain saw-level power output, but they are ideal packs for drill/impact driver use. Upgrade the cells and these become S/A-tier.
View on Amazon →Ratings
Actual capacity 5.2Ah - Xiuqiyu actually overdelivers on this claim!
Great mechanical construction. Robust tool contacts. Though cannot sustain high power due to cells overheating.
Actual capacity 5.2Ah.
Low-current cells are not suited for hard power tool use.
Great electrical construction, no red flags.
Testing Statistics
Cell notes
SWY / Shineway manufacturer. Model unknown. Unbranded 18650 cell.
Cycling Test
We cycle the batteries at high-power (800W for 20s on, then 20W for 6s off) to reflect their actual usage in high-load scenarios like circular saw use.
Capacity Test
We measure the amount of usable energy the pack supplies from 100% to 0% charge.
Pack Internal Resistance Test
Failure Test
The battery is stepped through 30s at increasing current levels, ignoring safety features like temperature and voltage warnings, until the pack fails catastrophically.
