20V 21700 Max Lithium Battery for Cordless Power Tools
Wholesale high-performance 20V 21700 Max Lithium Battery for Cordless Power Tools. Features 20V (18V nominal, 5S2P 21700 High-Density Heavy-Duty Architecture) delivering true 5.0Ah capacity, Grade-A 21700 cells with 5C heavy-duty continuous discharge rating, and integrated precision BMS. Certified CE, RoHS, UN38.3.
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Direct Engineering Answer: 20V 21700 Max Lithium Battery for Cordless Power Tools
This 20V 5.0Ah high-performance lithium-ion replacement battery is engineered on a 5S2P 21700 High-Density Heavy-Duty Architecture delivering 90Wh of verifiable nominal energy for heavy-duty industrial tools and cordless equipment. Assembled with Grade-A 21700 (4000mAh – 5000mAh) cylindrical cells and rated for 5C heavy-duty continuous discharge rating, it sustains 30A – 35A Continuous / 55A Peak Pulse (≤5s) with minimal voltage drop. The integrated industrial BMS features dual NTC temperature surveillance, hardware over-current cutoffs, and short-circuit response (≤300μs). Before wholesale procurement, verify your equipment voltage (20V), physical interface dimensions (125 × 80 × 74 mm (±1.5 mm)), and continuous operating current demands.
Key Product Facts
| Nominal Voltage & S-Configuration | 20V (18V Nominal, 5S2P 21700 High-Density Heavy-Duty Architecture) |
|---|---|
| Available Rated Capacities | 5.0Ah (True Tested Capacity @ 0.2C, 25°C) |
| Total Energy Output (Wh) | Approx. 90 Wh |
| Cell Specifications & Chemistry | Grade-A 21700 (4000mAh – 5000mAh) cylindrical cells |
| Discharge Multiplier & Currents | 5C heavy-duty continuous discharge rating | 30A – 35A Continuous / 55A Peak Pulse (≤5s) |
| Physical Dimensions & Net Weight | 125 × 80 × 74 mm (±1.5 mm) | 0.82 kg (±0.02 kg) |
| Enclosure Material & Protection | UL94-V0 impact-resistant flame-retardant ABS housing with vibration-damping internal brackets |
| Cycle Life Standard | ≥ 800 full charge/discharge cycles to 80% initial capacity |
| International Compliance | CE, RoHS, UN38.3, MSDS, 1.2m Drop Test Certified |
Full Parametric Electrical & Operating Specifications
| Electrical Parameter | Engineering Value & Tolerance | Test Condition & Standard |
|---|---|---|
| Operating Voltage Window | 15.0V – 21.0V | Full discharge to full charge cutoffs |
| Charge Voltage Cutoff | 21.00V ± 0.05V | Standard CC/CV algorithm (0.5C rate) |
| Discharge Voltage Cutoff | 15.00V ± 0.10V | Electronic load cutoff to prevent cell inversion |
| AC Internal Resistance (IR) | ≤ 24 mΩ | 1 kHz AC milliohm meter @ 25°C, 50% SoC |
| Recommended Charge Current | 2.0A – 4.0A (Max Fast Charge 6.0A) | Maintains optimal cell thermal equilibrium |
| Operating Temperature (Discharge) | -20°C to +60°C | Maintains sustained current under sub-zero conditions |
| Operating Temperature (Charge) | 0°C to +45°C | Automatic thermal low-temp charge lockout |
| Recommended Storage Conditions | 15°C to 25°C, 45%–65% RH | Maintain 40%–50% SoC during extended warehousing |
Equipment Compatibility & Industrial Applications
Engineered for seamless drop-in fitment, reliable contact continuity, and heavy mechanical shock resistance across the following platforms:
- Target Equipment Fleet: Universal industrial slide-on power tool interfaces, cordless fastening machinery, jobsite equipment, and custom automation battery docks
- Recommended Charging Hardware: Universal smart CC/CV lithium-ion chargers (18V-21V output, 2.0A-4.0A charge rate) and compatible multi-dock stations
- Terminal & Rail Alignment: Heavy-gauge reinforced nickel-plated copper terminal blades designed to eliminate micro-vibration arching under sustained jobsite use.
First-Party Manufacturing & Quality Assurance Standards
1. Automated 3-Axis Cell Grading
Every individual cylindrical cell undergoes automated grading before pack assembly: voltage delta ≤ 3 mV, internal resistance delta ≤ 1.5 mΩ, and capacity matching within ±1% to prevent premature pack degradation.
2. Pure Nickel Busbars & Precision Welding
Built with 0.15mm–0.20mm industrial pure nickel strips tested to ≥ 5.0 kgf destructive peel strength, ensuring ultra-low contact resistance and eliminating thermal hotspots during sustained high-current draws.
3. Multi-Tier Hardware BMS
Equipped with high-precision IC monitoring over-charge, over-discharge, short-circuit protection (≤300μs reaction), and dual NTC thermal sensors with automatic cutoffs.
4. 100% Full-Cycle Factory Aging
Every finished battery pack is placed on automated computerized aging racks for a 100% full charge-discharge cycle to verify real Ah capacity and electrical curves prior to packaging.
Operating Boundary Conditions & Application Fit
Recommended Applications
General jobsite construction, commercial plumbing, HVAC installation, woodworking, and metal fabrication.
System Incompatibilities
Proprietary wireless Bluetooth communication protocols or equipment requiring non-standard contact pinout configurations.
OEM / ODM Engineering & Customization Services
| Engineering Dimension | Configurable Options | Required Customer Input |
|---|---|---|
| Capacity & Cell Chemistry | Tier-1 domestic high-drain cells, Samsung 25R/30Q, LG HG2, or 21700 cells | Desired runtime and target duty cycle |
| Housing & Branding | Private-label pad printing, corporate logo laser engraving, bespoke color matching | Vector artwork (AI/PDF) & brand guidelines |
| BMS & Thermal Calibration | Custom over-current trips, low-temperature lockout thresholds | Peak motor stall current profile |
| Packaging & Logistics | Retail presentation boxes, bulk workshop cartons, drop-test verified UN cartons | Distribution channel requirements |
B2B Supply Terms & Export Compliance
Available for engineering evaluation; typical dispatch within 3–5 working days.
Standard packaging: 50 pcs. Custom private label OEM: 200 pcs per production run.
15–20 business days for container and palletized sea/air freight orders.
Fully certified Class 9 DG export with UN38.3 test summaries and compliant MSDS documentation.
Frequently Asked Technical Questions
Q1: What differentiates this battery from generic commodity tool packs?
Unlike commodity packs that utilize repurposed or low-rate storage cells, our packs use brand new Grade-A high-discharge cells (5C/10C rated) combined with pure nickel spot welding and balanced series circuits, preventing premature capacity loss under motor stalls.
Q2: How does the BMS protect the battery during prolonged high-demand drilling?
Our hardware protection circuit constantly monitors individual series cell voltages and pack internal temperature via dual NTC sensors. If temperatures exceed 70°C or continuous current spikes beyond safety limits, the BMS automatically halts discharge to safeguard cell chemistry.
Q3: Can GEB provide private label custom branding and packaging for tool distributors?
Yes. We offer complete OEM services including laser logo engraving, custom-colored ABS plastics, barcode labeling, retail presentation boxes, and verified UN-certified master shipping cartons.
Need Fleet Replacement Units or Wholesale OEM Quotations?
Submit your target tool fleet models, expected order volumes, or private-label customization specs. Our technical sales team provides full mechanical specs, sample units, and FOB/CIF pricing within 24 hours.
