Cylindrical 10.8V 5300mAh Rechargeable 21700 Li-ion Battery Pack for Cordless Power Tools

The BAKTH-21700CD-3S1P is a premium high-voltage lithium-ion battery pack, featuring a nominal 10.8V voltage (12.6V full charge), 5300mAh large capacity, and 57.24Wh energy output. Engineered with high-performance 21700CD cylindrical li-ion cells and a stable 3S1P series configuration (3 cells in series), it integrates superior energy density, consistent mid-high voltage delivery, and rugged industrial-grade construction—making it the ideal power source for professional devices, backup systems, and outdoor gear that demand reliable high-voltage energy and extended runtime.

• 5300mAh Balanced Runtime with 10.8V High Voltage: Delivers 57.24Wh of stable energy, powering devices for prolonged periods: supporting a portable CPAP machine for 10-12 hours of continuous use, a mini UPS for routers and security cameras for 6-8 hours of backup power, an outdoor LED floodlight for 20-25 hours, or a handheld POS terminal for 12-15 hours of daily operation. Perfect for emergency scenarios, on-site work, and off-grid use where frequent recharging is impractical.
• 21700CD High-Quality Cells & 3S1P Stability: Adopts advanced 21700CD cylindrical li-ion cells, boasting 30% higher energy density than traditional 18650 cells and excellent thermal stability. The 3S1P series configuration precisely aggregates voltage to 10.8V, ensuring balanced current distribution and consistent output—avoiding voltage fluctuations that may damage sensitive equipment. This combination guarantees reliable performance even under continuous heavy load.
• Comprehensive BMS Safety Protection: Equipped with a built-in high-precision Battery Management System (BMS) that provides multi-layer safeguards: over-charge protection (cuts off at 12.6V), over-discharge protection (shuts down at 8.4V), short-circuit protection, over-current protection, and over-temperature protection. The 21700CD cells’ inherent durability, paired with the BMS, eliminates risks of leakage, thermal runaway, or explosion, ensuring safe use in critical medical and industrial scenarios.
• Long Cycle Life & Low Self-Discharge: Supports 800+ deep charge-discharge cycles while retaining over 80% of original capacity, far outperforming generic high-voltage battery packs.

• Backup Power Systems: Mini UPS for routers, security cameras, home emergency devices, and small office equipment.
• Portable Medical Equipment: Portable CPAP machines, handheld diagnostic devices, small oxygen concentrators, and mobile medical carts.
• Outdoor & Surveillance Gear: Wireless security cameras, outdoor LED floodlights, portable camping equipment, and off-grid communication devices.
• Professional Devices: Handheld POS terminals, portable scanners, industrial sensors, and mobile data collectors.
• DIY & Industrial Projects: Custom backup power banks, off-grid Arduino projects, and small industrial equipment.

Shenzhen BAKTH Technology Co., Ltd. was established in 2002. For 21 years, we've specialized in battery pack assembly and PCM/BMS design and production. Our 5,000-square-meter factory features automated production lines and SMT assembly capabilities.

ISO9001, ISO14001, UL, BIS, KC, USTC, CE, CB - our battery packs have reliable quality assurance.

No limitation - we offer competitive pricing based on order quantity. Sample orders are welcome to test our quality before bulk orders.

Standard warranty is 12 months (negotiable for special products). Our complete production process ensures quality before shipment.

Standard products: 3-4 weeks for samples (depending on cell availability), 5-8 weeks for bulk orders (varies by model and quantity).

Yes - our professional R&D team can provide customized solutions according to your requirements.