Overview
The LiitoKala LT55A is a 21700-size 3.7V Li-ion rechargeable battery built for low-temperature and high-capacity applications. With a 5500mAh capacity, <15mΩ internal resistance, and -40°C operational capability, it provides reliable energy for demanding outdoor and industrial environments.
Main Features
- 5500mAh large capacity for long runtime and extended performance
- Operates reliably in extreme cold (-40°C) and hot environments up to +60°C
- Low internal resistance (<15mΩ) ensures stable discharge and low heat generation
- 5.5A discharge current supports mid- to high-drain devices
- Rechargeable design rated for long service life and consistent voltage output
- Customizable configuration: Nickel strip, Button-top, or PCB protection available
- Built with LiitoKala-grade Li-ion chemistry for durability and safety
Technical Specifications
| Parameter | Value |
|---|---|
| Brand | LiitoKala |
| Model | LT55A |
| Type | Li-ion 21700 Rechargeable Cell |
| Rated Voltage | 3.7V |
| Capacity | 5500mAh |
| Charge Voltage | 4.2V |
| Discharge Cut-off Voltage | 2.5V |
| Internal Resistance | <15mΩ |
| Max Charge Current | 2.75A |
| Max Discharge Current | 5.5A |
| 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 | 200pcs/box (48 × 26 × 10.5cm) |
Applications
Primary Uses:
Optimized for flashlights, e-bikes, and power tools, the LT55A delivers reliable power output in freezing and high-temperature environments.
Extended Benefits:
Ideal for outdoor lighting, industrial instruments, and portable energy systems, where consistent power and cold resistance are crucial.
Compatibility / Upgrade:
Compatible with devices using 21700 Li-ion batteries and LiitoKala smart chargers such as Lii-100, Lii-402, or Lii-500. Available in Nickel, Button-top, or PCB-protected versions for versatile applications.
Product FAQ
Can the LT55A work in subzero environments?
Yes. It is designed to operate reliably in temperatures as low as -40°C, making it suitable for cold-weather use.
What is the maximum discharge current?
The LT55A supports up to 5.5A continuous discharge, ideal for medium to high-drain applications.
Is the battery protected?
The standard version is unprotected, but PCB-protected models are available upon request.
What makes it a low-temperature battery?
It uses a special electrolyte formulation and electrode materials optimized for cold-weather stability and consistent voltage output.
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