⚡ INR21700-4600: 4600mAh in a Standard 21700 Package – Fewer Cells, Lower Cost, Proven Safety
The INR21700 4600mAh lithium ion cell from Great Power fits the standard 21700 form factor but delivers more than just compatibility—it delivers a true 4600mAh capacity at 0.2C discharge. This translates into fewer cells per pack, simpler BMS design, and a tangible reduction in overall system cost. For e-bike makers, power tool brands, and ESS integrators, this capacity bump means longer runtime without enlarging the battery enclosure. All backed by a 500-cycle floor (≥80% retention) and a safety profile that clears 130°C thermal shock, overcharge, and short-circuit tests.
📋 The Numbers That Actually Matter
| Parameter | Value |
|---|---|
| Nominal Capacity | 4600mAh (0.2C discharge) |
| Minimum Capacity | 4500mAh |
| Nominal Voltage | 3.6V |
| Charge Limit | 4.2V |
| Discharge Cut-off | 2.75V |
| AC Internal Impedance | ≤25mΩ |
| Dimensions | 21.7mm × 70.8mm |
| Weight | ≤69g |
Low internal impedance (≤25mΩ) keeps heat generation in check under load, while the standard 21700 dimensions allow drop-in integration with existing battery holders and spot-welding fixtures.
🔋 What About Fast Charging and Cold Weather?
| Mode | Rate | Time |
|---|---|---|
| Standard Charge | 0.2C CC-CV to 4.2V, cut-off ≤0.01C | ~6h |
| Fast Charge | 0.5C | ~3h |
| Max Charge (peak only) | 1C | — |
| Max Discharge (peak only) | 3C (13.8A) | — |
⚠️ Maximum charge/discharge currents are intended for occasional peak loads, not continuous cycling.
Cold-weather performance sets this cell apart:
| Temperature | -10°C | 0°C | 25°C | 55°C |
|---|---|---|---|---|
| Capacity Retention | ≥75% | ≥80% | 100% | ≥95% |
At -10°C, this INR21700 4600mAh lithium ion cell retains three-quarters of its rated capacity—a genuine advantage for outdoor equipment, cold-chain logistics, and winter-season products.
🔄 How Long Will It Last? 500 Cycles and Counting
- 500 cycles (0.2C charge, 1C discharge to 2.75V, 30min rests) with ≥80% capacity retention
- 28-day room-temperature storage: retention ≥85%, recovery ≥90%
- Long-term storage: 30%–50% SOC, recharge every 6 months
🔒 Tested. Proven. Certified.
All tests passed with no fire, no explosion, no leakage:
- Thermal shock: 130°C for 30 min
- Thermal cycling: 72°C ↔ -40°C, 10 cycles
- External short circuit (80±20mΩ load): surface temp <150°C
- Overcharge: 3C/4.6V for 12h
- Forced discharge: 1C reverse charge for 90min
Fully compliant with ROHS2.0, REACH, and EU Battery Directive (2006/66/EC).
🛡️ Built to Handle Rough Conditions
- Drop test: 1.0m onto concrete, 4 drops (both ends + cylindrical body) – no damage
- Vibration test: 10–55Hz, 1.6mm amplitude, X/Y/Z axes, 30min each – no damage
⚠️ Before You Integrate: Critical Rules to Follow
| Condition | Range |
|---|---|
| Charge Temperature | 0°C ~ 45°C |
| Discharge Temperature | -20°C ~ 65°C |
| Humidity | 60±25% R.H. |
| Prohibited | Charging below 0°C causes irreversible lithium plating |
Warranty: One year against manufacturing defects.
📩 Ready to Power Your Next Project?
This INR21700 4600mAh lithium ion cell combines high energy density, proven safety, and consistent quality—delivering what procurement teams value most: fewer field failures, lower warranty costs, and reliable supply.
Samples and full datasheets available on request. Contact our sales engineering team to discuss your specific application requirements.
📧 Email: info@becellbattery.com
🌐 Website: www.becellbattery.com