SUNWELL TOOLS CO., LTD

38 years of garden tool OEM/ODM — serving LIDL / ALDI / GARDENA / FISKARS

ET-C026 Cordless Pruning Shear (21V Brushless)

Target Markets: Germany · Spain · France | September 2026

Executive Summary

This document converts the three verified EU pain points — battery reliability/runtime anxiety, inconsistent cutting performance (jams, dulling, overstated capacity), and ergonomic/safety concerns — into a controlled product specification: 160 W brushless motor, certified 25 mm cutting capacity, SK5 blade with verified cuts-per-charge, HRC54±2 process control, double-trigger safety and a four-stage IQC-IPQC-FQC-OQC quality system, aligned to CE, GPSR and EU Battery Regulation 2023/1542. Target personas: DE quality home gardener ~35%, FR passionné ~25%, ES value DIY ~20%, professional/municipal crews ~12%, orchard/vineyard smallholders ~8%.

1. Quantified Requirements by Pain Point

Pain Point 1 — Battery reliability & runtime (23.0% defective battery + 11.7% runtime complaints)

Cordless pruning depends entirely on the battery. EU review analysis lists “defective battery” as 23.0% of negative feedback and “battery life challenges” a further 11.7%; EU Battery Regulation 2023/1542 also mandates CE-marked, labeled and — from 18 February 2027 — end-user removable/replaceable portable batteries. Verbatim: “Used it twice. Battery died after 20 minutes… now I have two sets of shears and no spare batteries”; “Battery life often doesn't last long enough to finish a job.”

Requirement	Target	Verification
Cells	Grade-A Li-ion cells with UN 38.3 transport report and EN/IEC 62133-2 test report; brand and capacity documented	IQC cell-capacity sorting; supplier certificates
Pack / BMS	21V 2.0Ah; declared Wh TBC; BMS with over-charge, over-discharge, over-current, short-circuit and thermal protection	BMS functional test; UN38.3; IEC 62133-2
Endurance	Cuts per full charge on standardized test wood verified and declared — TBC; class benchmark ~1,500–2,500 cuts	Standardized cutting-cycle endurance test (record wood diameter/species)
Kit & charger	Dual-battery + charger SKU for pro/uninterrupted use; charge time measured — TBC; charger CE / EN 60335-2-29, 100–240V input	Packing list audit; timed charge with temperature monitoring
Level indicator	LED or LCD battery-level display (4-level minimum)	Functional test at 100/75/50/25/0% charge
Removability	Tool-free battery removal/replacement, designed to EU 2023/1542 Art.11 (Feb 2027); target removal ≤30 s	Design review + user-trial removal test

Pain Point 2 — Inconsistent cutting performance (jams, dulling, capacity overstatement)

Entry listings commonly claim 40–50 mm capacity while reviews report ragged cuts, jams and premature dulling; knowledgeable French viticulturists and German quality buyers punish false claims. The SK5 HRC54±2 blade with ILAFLON coating must deliver demonstrably consistent cuts within the confirmed 25 mm rated capacity (the page's earlier 28 mm figure is superseded), driven by the confirmed 160 W brushless motor (the earlier 500 W figure is superseded). Verbatim: “Premature blade dulling, short battery life, and ragged or uneven cuts… occasionally resulting in jammed blades”; positive benchmark — “Blades still sharp after 150 hours… only downside: no case included.”

Requirement	Target	Verification
Blade hardness	SK5 blade HRC54±2, verified per batch	Rockwell hardness test (sampling plan) + mill certificate
Cutting capacity	Certified maximum cut on standard fresh hardwood — 25 mm confirmed (state wood species and moisture)	Cutting-capacity test; published test condition
Non-stick coating	ILAFLON coating; salt-spray resistance hours declared — TBC; no flaking after endurance cycles	Coating thickness gauge; cross-hatch adhesion; ISO 9227 / ASTM B117 salt-spray
Motor	Brushless BLDC, 160 W rated power (confirmed); motor life hours TBC	Motor spec/dyno sheet; continuous-run life test; EMC test
Gears / pivot	Semi-steel + powder-metallurgy gears; adjustable pivot screw; minimal play after endurance; cycle life target 300,000+ — TBC	Density/metallurgy check; gear endurance test; backlash pre/post test
Serviceability	Tool-free or hex-key blade swap; spare blade SKU; edge angle TBC	Serviceability trial; spare-part availability list

Pain Point 3 — Ergonomics, weight & safety (17.1% heavy, 7.3% balance)

Buyers skew older (50–75 in DE/FR) and include female and left-handed users; municipal and allotment use adds noise and child-safety concerns. Premium competitors set the bar: FELCO shears run 745–825 g; value brands at 1.0–1.7 kg draw wrist-strain complaints. Verbatim: “The pruner stresses the wrist after a while, and the safety trigger can dig into your hand”; “The safety shutoff isn't immediate, and the blades will operate with a single trigger pull during that period.”

Requirement	Target	Verification
Weight	Total weight with battery ≤ 1.1 kg target — TBC (not currently published)	Scale check per production unit sampling
Grip	TPR anti-slip overmold; ergonomic ambidextrous geometry; fits small and large hands	Hand-fit user trials; dimensional check; material aging test
Safety start	Double-trigger / two-step activation to prevent accidental start	100% FQC functional test; misfire trial
Auto shut-off	Auto standby after ~60 s idle; full power-off after ~3 min; closed-blade rest position + blade cover in kit	Timing functional test; kit inspection
Noise / vibration	Sound power LWA dB(A) and hand-arm vibration measured per EN 62841 — TBC	Noise and vibration test reports
Drop resistance	Functional after ~1.2 m packaged drop (ISTA-style); unpackaged safety criterion TBC	Drop test + functional retest

2. Features to Technical Breakdown

Each pain point breaks down into product features, engineering parameters and test methods. TBC values require factory confirmation with a test method before quotation or listing; no unverified value may be printed on packaging or retail pages.

2.1 Battery & runtime

Product feature	Technical breakdown	Key parameter	Test / verification
21V Li-ion pack	5-series Li-ion cells (21V nominal), 2.0Ah; BMS PCBA	21V; 2.0Ah; Wh TBC; grade-A cells	IQC capacity sorting; UN 38.3; IEC/EN 62133-2
Battery management	Over-charge / over-discharge / over-current / short-circuit / thermal protection	Protection thresholds per cell supplier spec — TBC	BMS protection function test (short, over-current, over-temp)
Removable design	Latch-release slide pack; end-user replaceable without tools (EU 2023/1542 Art.11)	Removal time ≤30 s; no tools	User-trial removal test; design review
Dual-battery kit	Two identical packs + charger in kit SKU	2 × 21V 2.0Ah; charger 100–240V	Packing list audit; charging test
Runtime	Cuts per charge on standard wood	Cuts/charge TBC — target 1,500–2,500 class	Standardized cutting-cycle test; record wood diameter/species
Fuel gauge	LED/LCD level indicator on pack or handle	4-level LED minimum	Functional test at charge levels

2.2 Cutting performance & durability

Product feature	Technical breakdown	Key parameter	Test / verification
SK5 blade	High-carbon tool steel (JIS SK5), stamped/forged blank, hardened & tempered	Hardness HRC54±2; SK5 material cert	Rockwell HRC batch test; mill certificate
Blade edge	Precision ground bypass edge; anvil/pivot geometry	Edge angle TBC; cut-face smoothness standard	Optical/edge check; cut-quality test on wood rods
ILAFLON coating	Non-stick fluoropolymer coating on blade	Coating thickness μm TBC; salt-spray hours TBC	Thickness gauge; neutral salt-spray ISO 9227/ASTM B117
Brushless motor	BLDC motor + control board; higher efficiency and life than brushed	160 W rated (confirmed); peak/life hours TBC	Motor spec/dyno; continuous-run life test; EMC
Gear transmission	Semi-steel + powder-metallurgy gears; reduction set	Material density/grade TBC; backlash TBC	Metallurgy/density check; gear endurance test
Cutting capacity	Mechanical advantage × motor torque × blade opening	Rated max cut 25 mm confirmed; state wood species/moisture	Certified cutting test on standard fresh hardwood
Endurance / service	Full-cycle operation to service point; tool-free blade swap	Cycles TBC — 300,000+ class target; swap time	Automated cutting-cycle endurance; serviceability trial

2.3 Ergonomics, weight & safety

Product feature	Technical breakdown	Key parameter	Test / verification
Lightweight body	Polymer housing + compact BLDC; balance point at grip	Weight with battery TBC — target ≤1.1 kg	Scale measurement; balance-point check
TPR handle	TPR overmold on PP/PA frame; fluted grip	Polymer grade TBC; TPR Shore hardness TBC	Material cert; grip friction check; aging test
Ambidextrous layout	Symmetrical trigger layout; left/right hand operation	Fits hand-size range	User trial panel (small/large hands)
Double-trigger safety	Trigger + safety-release two-step start	Two-handed sequential activation required	100% functional test; misfire trial
Auto power-off	Idle detection logic on control board	Standby ~60 s; off ~3 min	Timing functional test
Low noise / vibration	BLDC + gear mesh tuning; motor mounts; TPR damping	LWA dB(A) TBC; hand-arm vibration m/s² TBC	EN 62841 sound power and vibration tests
Drop robustness	Structural bosses; battery latch security	1.2 m packaged drop; functional criteria	Drop test + functional retest

3. Materials, Process & Quality Control

3.1 Material selection

Item	Options	Characteristics	Recommendation
Blade steel	SK5 (default) / 65Mn / stainless (420–440 class)	SK5 best edge retention at HRC54±2; 65Mn lower cost with good toughness; SS best corrosion resistance, lower edge retention	SK5 + ILAFLON for DE/FR mainline; 65Mn for aggressive value bundles (ES, LIDL/ALDI-type); SS for coastal/humid variant
Housing / body	PP vs PA6+GF (glass-filled nylon)	PA6+GF higher impact and heat resistance near motor; PP lighter and cheaper	PA6+GF for gearbox-side housings; PP acceptable for TPR-overmolded handle covers; grade TBC
Grip / triggers	TPR overmold; PA (nylon) levers	Anti-slip, shock-absorbing, comfortable in cold/damp; PA tough and fatigue-resistant	TPR default (Shore hardness TBC); PA triggers with fatigue validation
Surface treatment	ILAFLON (default) / PTFE / hard chrome / bare steel	Non-stick, low friction, corrosion protection; bare oiled steel not recommended for EU retail	ILAFLON default; PTFE premium option if cost-position allows; salt-spray rating to be established
Key components	P/M semi-steel gears; BLDC motor; grade-A 18650 cells; CE charger 100–240V; MCU board with BMS + safety logic	Verified cells are the single biggest lever against the #1 review complaint (defective batteries)	Density/endurance tests on gears; motor life test; 100% cell IQC capacity sort; charger EN 60335-2-29

All blade materials require batch material certificates and HRC verification regardless of SKU.

3.2 Process plan (key stages)

Blade machining: blank stamping/forging → edge blanking → heat treatment (quench + temper to HRC54±2, Rockwell verified per batch) → precision edge grinding → surface preparation → ILAFLON/PTFE coating & cure → coating thickness/adhesion check → assembly inspection (no burrs, no flaking, blade fits pivot).

Handle/housing molding: material drying → injection molding (PP/PA6+GF, parameters per polymer grade) → TPR overmolding with bond-strength check → de-gating/deflashing → dimensional check → housing/battery-slide fit check.

Mechanism assembly: gear P/M incoming inspection (density, tooth dimensions, no cracks) → gear train + motor mounting → control board/BMS fitting → pivot bolt adjustment (clean cut without play) → trigger & safety mechanism fitting → lubrication → 100% functional check (double-trigger logic, auto-off timing, cut cycles) → noise check.

Final assembly & packaging: blade + body assembly → battery/charger kitting → 100% safety & function tests → endurance sample test → DE/FR/ES manuals and CE/GPSR/battery labels with EU responsible person → color/white box with laser logo and accessory list (spare blade, hex key, sharpening stone, blade cover, case option) → packaged drop test per lot → carton packing with lot code.

3.3 Four-stage quality system (IQC → IPQC → FQC → OQC)

Stage	Inspection items	Inspection items	Method / frequency	Method / frequency
IQC (incoming)	Blade steel grade & HRC; cells (capacity, UN38.3/IEC reports); polymer grade; gears density/dimensions; coating; fasteners	Blade steel grade & HRC; cells (capacity, UN38.3/IEC reports); polymer grade; gears density/dimensions; coating; fasteners	Mill cert review; Rockwell test; 100% cell capacity sort or AQL; dimension measurement; every incoming batch	Mill cert review; Rockwell test; 100% cell capacity sort or AQL; dimension measurement; every incoming batch
IPQC (in-process)	Heat treatment result; edge quality; coating thickness/adhesion; molding; pivot adjustment; safety logic	Heat treatment result; edge quality; coating thickness/adhesion; molding; pivot adjustment; safety logic	First piece per run + patrols every 1–2 h; Rockwell per hardening batch; functional cut tests	First piece per run + patrols every 1–2 h; Rockwell per hardening batch; functional cut tests
FQC (finished)	Function (start, cut, display, charger); double-trigger safety; auto-off; appearance; kit contents; labels	Function (start, cut, display, charger); double-trigger safety; auto-off; appearance; kit contents; labels	100% functional test; AQL 2.5 major for appearance	100% functional test; AQL 2.5 major for appearance
OQC (outgoing)	Carton count, packaging integrity, drop test, lot traceability, documents/certificates	Carton count, packaging integrity, drop test, lot traceability, documents/certificates	AQL 1.0 critical / 2.5 major per ANSI/ASQ Z1.4; random sampling; every shipment lot	AQL 1.0 critical / 2.5 major per ANSI/ASQ Z1.4; random sampling; every shipment lot
Key control point	Key control point	Control method	Control method	Non-conformance handling
Cell / battery pack reliability	Cell / battery pack reliability	Cell capacity sorting; UN38.3 & IEC 62133-2 reports; BMS protection test; pack aging test	Cell capacity sorting; UN38.3 & IEC 62133-2 reports; BMS protection test; pack aging test	Reject outlier cells; quarantine non-conforming packs; supplier corrective action
Blade hardness consistency	Blade hardness consistency	Rockwell HRC test every heat-treatment batch; reject outside HRC54±2	Rockwell HRC test every heat-treatment batch; reject outside HRC54±2	Re-treat or scrap; adjust furnace profile; record batch
Coating quality	Coating quality	Thickness gauge + adhesion + salt-spray rating (TBC)	Thickness gauge + adhesion + salt-spray rating (TBC)	Reject flaking/under-thickness; re-clean and re-coat
Cutting performance	Cutting performance	Standardized cut test on fresh wood rods; no jams/crushing at the rated 25 mm diameter	Standardized cut test on fresh wood rods; no jams/crushing at the rated 25 mm diameter	Re-adjust pivot; re-sharpen; escalate to engineering if systemic
Safety functions	Safety functions	100% double-trigger and auto-off functional test	100% double-trigger and auto-off functional test	No bypass — any failure routes to rework line; board replacement
Gear/mechanism endurance	Gear/mechanism endurance	Sampling cycle endurance test (300,000+ class target)	Sampling cycle endurance test (300,000+ class target)	Lot hold on failure; design/supplier investigation
Documentation compliance	Documentation compliance	CE DoC; GPSR EU-responsible info; battery labels; DE/FR/ES manuals verified	CE DoC; GPSR EU-responsible info; battery labels; DE/FR/ES manuals verified	Shipment hold until label/manual artwork approved

Traceability: a laser/printed lot code on each nameplate links the unit to the steel mill certificate and heat-treatment/HRC batch, cell supplier batch with UN38.3 and BMS records, motor/PCBA firmware version, coating batch and inspection records; carton lot codes link to packing lists and certificate sets. CE DoC, SGS/TUV reports and BSCI/Sedex audit records are retained for 10 years per GPSR.

4. TBC Parameters — Factory Confirmation Checklist (13 items)

Motor rated power (160 W) and maximum cutting diameter (25 mm) are confirmed and removed from this list. The following remain unverified; none may be printed on packaging, retail pages or quotations until confirmed with a defined test method.

#	Parameter	Required confirmation
1	Weight with battery	Production scale value (design target ≤ 1.1 kg)
2	Cuts per charge / runtime	Standardized cutting-cycle test result
3	Charge time	Timed result with supplied charger
4	Battery Wh & cell configuration	Cell brand, arrangement, Wh rating; cycle life
5	Endurance life (cycles)	Cycle test to blade/gear service point (300,000+ class target)
6	Noise LWA dB(A)	EN 62841 / ISO sound power measurement
7	Hand-arm vibration	EN 62841 vibration measurement
8	Salt-spray rating	ILAFLON / PTFE neutral salt-spray hours (ISO 9227 / ASTM B117)
9	Coating thickness	μm specification and adhesion grade
10	Housing polymer grades	PP / PA6+GF actual grades; TPR Shore hardness
11	Gear specs	P/M density, tooth tolerance, backlash, torque rating
12	Drop criteria	Unpackaged safety criterion after drop
13	Blade edge angle	Grinding specification