3.7V 8400mAh High-Capacity 18650 Battery Pack with NTC Thermistor
Premium 3.7V 8400mAh rechargeable battery pack delivering 31.08Wh of high-density energy. This robust power solution features integrated safety protection and an NTC thermistor for precise temperature monitoring. Housed in a compact, flat form factor (68.5mm x 56.5mm x 19.5mm) and equipped with a ZHR-3P connector, it is engineered for long-lasting performance in demanding portable applications.
Description
Model 18650 – Ultra-High Capacity Lithium Battery Pack with NTC
Voltage: 3.7V | Capacity: 8400mAh (31.08Wh) | Size: 68.5×56.5×19.5mm

Engineered for extended runtime and superior reliability, this 18650 Lithium Battery Pack is a high-performance power source for advanced electronic devices. By combining multiple high-quality 18650 cells, this pack achieves a massive 8400mAh capacity, significantly reducing the need for frequent recharging.
Safety is paramount; the unit comes pre-installed with a sophisticated Protection Circuit Module (PCM) to guard against over-current, over-voltage and short circuits. Furthermore, the inclusion of an NTC Thermistor allows your device to monitor internal temperature in real-time, ensuring safe operation even under heavy loads. The durable UL1571 AWG24 wires and secure ZHR-3P connector ensure stable power transmission and easy integration.
Technical Specifications
| Battery Type | Lithium Ion Battery |
| Part Number | 18650 |
| Voltage @ Capacity | 3.7V @ 8400mAh (31.08Wh) |
| Protection Circuit | Yes (PCM Included) |
| Thermistor (NTC) | Yes |
| Wires | UL1571 AWG24 70mm |
| Connector | ZHR-3P |
| Dimensions (L x W x T) | 68.5mm x 56.5mm x 19.5mm |
| Charge Current | 0.2C to 0.5C (Standard Charge) |
| Discharge Current | 0.5C to 1.0C (Continuous) |
| Storage Temperature | -20°C to +60°C |
Core Advantages
- ✔
Ultra-High Capacity: 8400mAh (31.08Wh) offers exceptional longevity for power-hungry devices requiring all-day operation. - ✔
Advanced Safety System: Comprehensive PCM and NTC temperature sensor prevent overheating and electrical damage. - ✔
Space-Efficient Design: Flat rectangular form factor fits neatly into compact enclosures despite high capacity. - ✔
Reliable Connectivity: Pre-wired with locking ZHR-3P connector that resists vibration and accidental disconnection.
Perfect For Applications
Infusion pumps, portable monitors and diagnostic tools requiring NTC monitoring.
Barcode scanners, data loggers and rugged industrial tablets.
High-end portable audio equipment, GPS units and smart home hubs.
Professional video lights and emergency lighting rigs.
Customization Services (OEM/ODM)
We understand that every project is unique. We offer extensive OEM and ODM customization services to tailor this battery pack to your specific requirements:
- Connector Options: Replace standard ZHR-3P with JST, Molex or custom wire harnesses.
- Wire Length & Gauge: Adjustable wire lengths and types (UL1007, UL3302) to fit internal layouts.
- Capacity Configuration: Adjust cell series/parallel arrangements to modify voltage and capacity.
- Branding: Custom labeling and shrink-wrap colors to match your brand identity.











