The 21V 2.0Ah lithium-ion battery delivers high energy density, fast charging, and lightweight portability for DaYi cordless power tools. Its optimized voltage and capacity ensure consistent performance in drills, saws, and grinders, while advanced safety circuits prevent overheating. Compatible with DaYi’s 21V tool series, it offers 20-30% longer runtime than standard NiCd batteries, making it ideal for professional and DIY projects.
CATL Qilin Battery Energy Density
How Does the 21V 2.0Ah Battery Enhance Tool Performance?
The 21V 2.0Ah battery uses lithium-ion chemistry to provide stable voltage output, reducing power drops during heavy loads. Its 2.0Ah capacity balances runtime and weight, enabling tools like DaYi drills to maintain torque in dense materials. With a 45-minute recharge time and 500+ cycle lifespan, it minimizes downtime and extends tool longevity compared to older battery types.
This battery’s intelligent power management system dynamically adjusts output based on tool demands. When used with DaYi’s DY-2020 Circular Saw, it delivers consistent RPM during prolonged cuts through hardwood. The thermal regulation system maintains optimal cell temperature between -10°C to 40°C, ensuring stable performance in various working conditions. Field tests show 18% faster driving speed in impact wrenches compared to previous 1.5Ah models.
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| Tool Model | Runtime (Continuous Use) | Charge Cycles |
|---|---|---|
| DY-1880 Hammer Drill | 45 minutes | 500+ |
| DY-2150 Angle Grinder | 30 minutes | 480 |
What Safety Features Protect the 21V 2.0Ah Battery?
Built-in protections include:
– Overcharge prevention via voltage cutoff at 21.6V
– Temperature sensors that halt charging above 45°C
– Short-circuit safeguards with resettable fuses
– Cell balancing to avoid voltage mismatches
These features ensure safe operation in humid or dusty environments, aligning with DaYi tool safety standards.
The multi-layered protection system incorporates three independent monitoring circuits that cross-verify operational parameters. In drop tests from 2 meters, the shock-absorbent casing demonstrated 100% functional survival rate. The battery’s moisture-resistant seals meet IP54 standards, effectively blocking dust particles larger than 1mm. During extreme stress testing, the redundant thermal cutoff mechanism prevented cell venting even when exposed to 150°C external temperatures for 30 seconds.
| Safety Feature | Activation Threshold | Response Time |
|---|---|---|
| Overvoltage Protection | 21.6V | 50ms |
| Thermal Cutoff | 75°C | 200ms |
Which DaYi Tools Are Compatible With This Battery?
The battery works with DaYi’s 21V cordless series, including:
– DY-1880 Hammer Drill
– DY-2020 Circular Saw
– DY-2150 Angle Grinder
– DY-2300 Impact Wrench
It uses a slide-on interface with dual contact points, ensuring secure attachment. Avoid using with 18V or 24V tools, as voltage mismatches may damage devices.
How to Maximize the Battery’s Lifespan?
Follow these practices:
1. Store at 40-60% charge in 15-25°C environments
2. Avoid full discharges; recharge when 20% capacity remains
3. Clean terminals monthly with isopropyl alcohol
4. Use only DaYi-approved chargers (model DC-2100)
5. Replace if capacity drops below 70% of original
What Environmental Benefits Does This Battery Offer?
Lithium-ion batteries reduce waste by lasting 3x longer than NiCd alternatives. They contain no toxic cadmium, lowering landfill hazards. DaYi’s recycling program recovers 92% of battery materials, including cobalt and lithium salts. The 2.0Ah size minimizes resource use while meeting EU RoHS and REACH compliance standards.
How Does It Compare to Higher-Capacity Batteries?
While 4.0Ah/5.0Ah batteries provide longer runtime, the 2.0Ah model is 35% lighter (450g vs 720g), reducing user fatigue. It’s ideal for intermittent tasks like screwdriving or drilling softwoods. For continuous use (e.g., demolition), pair two 2.0Ah batteries with DaYi’s dual-port charger for uninterrupted workflow.
“The 21V 2.0Ah battery represents a sweet spot between power and practicality. Its use of NMC 811 cathode chemistry improves energy density by 15% over previous generations while reducing cobalt content. For contractors, this means carrying fewer batteries without sacrificing all-day performance. The built-in fuel gauge with LED indicators is a game-changer for job site efficiency.”
— Industry Expert, Power Tool Battery Consortium
FAQs
- Can I use this battery with non-DaYi tools?
- No – the proprietary interface ensures compatibility only with DaYi’s 21V series.
- Does cold weather affect performance?
- Runtime may decrease by 20% below 0°C; store batteries indoors when not in use.
- How do I activate the warranty?
- Register online within 30 days of purchase for 24-month coverage against defects.