BECELL offers genuine JOINSUN INR21700-60D 21700 rechargeable cells. 6000mAh capacity, ≤22mΩ internal resistance, 12A continuous / 18A pulse discharge, -20℃ low-temp support. Ideal balance of energy, power and price. Available for wholesale & global shipping.
The Balanced Choice: JOINSUN INR21700-60D – Reliable 6000mAh Power for Everyday Applications
Not every project requires the absolute highest capacity or the lowest internal resistance. Sometimes, you need a cell that just works – consistently, safely, and affordably. The JOINSUN INR21700-60D delivers exactly that: a proven 6000mAh 21700 platform with solid rate capability and wide temperature tolerance, making it a favorite among pack assemblers and OEMs worldwide.
Key Specifications at a Glance
| Parameter | Value |
|---|---|
| Nominal Capacity | 6000mAh (0.2C discharge) |
| Minimum Capacity | 5900mAh |
| Nominal Voltage | 3.60V |
| AC Internal Resistance (1kHz) | ≤22 mΩ |
| Charge Cut-off Voltage | 4.20V |
| Discharge Cut-off Voltage | 2.50V |
| Standard Charge Current | 0.2C (1.2A) |
| Max Continuous Charge Current | 1C (6A) @ 25℃ |
| Max Continuous Discharge Current | 2C (12A) @ 25℃ |
| Max Instantaneous Discharge (5s on, 10s off) | 3C (18A) @ 25℃ |
| Weight | ≤75g |
| Dimensions | Ø21.7±0.15mm × H70.9±0.2mm |
| Operating Temperature – Charge | 0℃ ~ 50℃ |
| Operating Temperature – Discharge | -20℃ ~ 60℃ |
Rate Capability Performance
Tested at 25℃ after standard charge (0.5C to 4.20V, 0.01C cut-off):
| Discharge Current | Capacity Retention (vs. 0.2C) |
|---|---|
| 0.2C (1.2A) | 100% (reference, ≥6000mAh) |
| 0.5C (3A) | ≥98% |
| 1C (6A) | ≥95% |
| 2C (12A) | ≥92% |
At 2C (12A) continuous discharge, the 60D still delivers over 92% of its low-rate capacity – sufficient for most power tools and e-mobility applications.
Low-Temperature Discharge Test Data – Real-World Validation
BECELL conducted independent discharge tests under standard conditions (0.2C constant-current discharge after full charge) to verify cold-weather performance:
| Test Temperature | Cut-off Voltage | Relative Capacity (vs. 25℃) |
|---|---|---|
| 25℃ (Room Temp) | 2.5V | 100% (reference) |
| 0℃ | 2.5V | ≥85% |
| -10℃ | 2.5V (spec: 2.5V) | ≥80% |
| -20℃ | 2.5V | ≥65% |
*Test conditions: Cells fully charged at 25℃, then conditioned at target temperature for 4 hours (or 24h for -20℃) before discharge. Discharge current: 0.2C (1.2A). Data complies with JOINSUN specification PS-RD-064 A00.*
Key takeaway: Even at -20℃, the JOINSUN 60D retains nearly two-thirds of its room-temperature capacity, making it suitable for outdoor applications in temperate and cold climates.
Cycle Life
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≥500 cycles under 0.5C charge / 1C discharge (4.20V–2.75V) at 25℃, retaining ≥80% of initial capacity.
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≥300 cycles under 1C charge / 2C discharge (more aggressive) with same retention.
This level of durability is ideal for devices expected to last 2-3 years of daily use.
Safety & Reliability
The JOINSUN 60D has passed mandatory safety tests per industry standards:
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Overcharge (1C to 1.5× cut-off voltage) – no fire, no explosion
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Overdischarge (1C for 1.5h) – no fire, no leakage
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External short circuit (<5mΩ wire for 10min) – no fire, no explosion
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Drop (1.0m to concrete) – no fire, no leakage
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Heating (130℃ for 30min) – no fire, no explosion
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Seawater immersion (3.5% NaCl, 2h) – no fire, no explosion
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Low pressure (11.6kPa for 6h) – no leakage, no fire
Head-to-Head: JOINSUN 60D vs. Other High-Capacity 21700 Cells
| Model | Capacity (Typ.) | ACIR | Max Cont. Discharge | Low-Temp (-20℃) | Weight | Best For |
|---|---|---|---|---|---|---|
| JOINSUN 60D | 6000mAh | ≤22mΩ | 12A (2C) | ≥65% | ≤75g | Balanced, cost-effective |
| Amprius SA112 | 6500mAh | ≤22mΩ | 13A | Not specified (likely similar) | 72g | Maximum runtime |
| RENLIN RH60 | 6000mAh | ≤7mΩ | 20A | ≥80% @ -20℃ / >65% @ -40℃ | ≤71g | High power, low temp |
| FEB 6000 | 6000mAh | ≤25mΩ | 12A (2C) | ≥70% @ -20℃ | ≤75g | General purpose |
Positioning: The JOINSUN 60D sits between the ultra-high-energy SA112 and the ultra-high-power RH60. It offers a proven, no-surprises specification at a competitive price point, making it the go-to choice for high-volume consumer electronics, entry-level e-bikes, and backup power systems where extreme performance is not required but reliability is paramount.
Applications Best Suited for JOINSUN 60D
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Electric bicycles (e-bikes) and scooters – 12A continuous supports typical 250W-500W motors.
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Portable power stations – 6000mAh per cell provides good energy density for compact designs.
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Home energy storage (ESS) – reliable cycle life for daily charge/discharge.
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Industrial IoT devices – wide temperature range and stable voltage profile.
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LED lighting and backup systems – cost-effective and safe.
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DIY battery packs – easy to source, easy to weld (resistance/laser welding recommended).
Why Buy from BECELL?
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Genuine JOINSUN cells – direct from manufacturer-authorized channels.
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Massive inventory – ready for immediate shipment in wholesale quantities.
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Competitive wholesale pricing – volume discounts for pack assemblers, distributors, and OEMs.
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Test data available – we can provide sample test reports and lot-matched ACIR/OCV data.
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Global shipping – fast, insured logistics with customs documentation support.
Order Now
Upgrade your battery packs with the reliable and affordable JOINSUN INR21700-60D. Contact BECELL or visit our Alibaba store to request a quote or place your wholesale order.
Alibaba Online Store: [Insert your Alibaba link here]
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