Overview
The LiitoKala LT42A is a 21700 Li-ion rechargeable battery engineered for extreme temperature and high-drain applications. With a 4200mAh capacity and 45A discharge capability, it maintains stable power delivery even at -40°C, making it ideal for professional and outdoor use.
Main Features
- High-drain 45A discharge current for powerful device performance
- 4200mAh capacity ensures long runtime and consistent output
- Low internal resistance (<15mΩ) enhances efficiency and heat control
- Excellent cold-weather performance – reliable operation down to -40°C
- Rechargeable up to 1000 cycles, providing long-term cost efficiency
- Durable 21700 construction with optional Nickel, Button-top, or PCB customization
- Safe and stable chemistry designed for industrial and high-power applications
Technical Specifications
| Parameter | Value |
|---|---|
| Brand | LiitoKala |
| Model | LT42A |
| Type | Li-ion 21700 Rechargeable Cell |
| Rated Voltage | 3.7V |
| Capacity | 4200mAh |
| Charge Voltage | 4.2V |
| Discharge Cut-off Voltage | 2.5V |
| Internal Resistance | <15mΩ |
| Max Charge Current | 8.4A |
| Max Discharge Current | 45A |
| Operating Temperature (Discharge) | -40°C to +60°C |
| Operating Temperature (Charge) | 0°C to +60°C |
| Storage Temperature | 23°C |
| Recharge Cycles | Up to 1000 |
| Size | 21 × 70mm ±1mm |
| Weight | 65g ±1g |
| Protection | Optional (Nickel / Pointed / PCB) |
| Packaging | 400pcs/box (42.5 × 22 × 16cm) |
Applications
Primary Uses:
Built for flashlights, e-bikes, power tools, and outdoor lighting systems, the LT42A provides high current output and stable voltage even in subzero conditions.
Extended Benefits:
Ideal for RC models, industrial sensors, and high-performance portable devices requiring both high-drain capability and cold resistance.
Compatibility / Upgrade:
Compatible with devices using 21700 lithium cells and LiitoKala smart chargers. Custom configurations (Nickel, Button-top, or PCB) available to match various pack designs and professional-grade applications.
Product FAQ
Can the LT42A operate in very low temperatures?
Yes. It is engineered to perform reliably at -40°C, providing consistent output for outdoor and cold-climate equipment.
What is the maximum discharge current?
The LT42A supports up to 45A continuous discharge, suitable for high-drain devices such as power tools and flashlights.
Is it a protected battery?
The standard version is unprotected, but PCB-protected and Nickel/Pointed versions can be customized.
What makes this battery special compared to standard 21700 cells?
The LT42A offers low-temperature resilience and high current capability, outperforming standard 21700 cells in extreme conditions.
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