Overview
The LiitoKala Lii-36S+ is a 3.7V 18650 Li-ion rechargeable battery offering 3600mAh high capacity and ≤38mΩ internal resistance. Designed for stable and efficient power delivery, it is widely used in portable electronic devices, lighting tools, and high-drain equipment.
Main Features
- 3600mAh capacity for long runtime and sustained performance
- Low internal resistance (≤38mΩ) for improved efficiency and minimal power loss
- Rechargeable up to 1000 times, providing long-term cost savings
- Wide working voltage range (2.75V–4.2V) ensures steady output and reliable energy supply
- Built-in explosion-proof valve enhances safety and operational stability
- Customizable configurations available: Nickel strip, Button-top, or PCB protection
- Compatible with all LiitoKala smart chargers and 18650 battery systems
Technical Specifications
| Parameter | Value |
|---|---|
| Brand | LiitoKala |
| Model | Lii-36S+ |
| Type | Li-ion 18650 Rechargeable Cell |
| Rated Voltage | 3.7V |
| Capacity | 3600mAh |
| Charge Voltage | 4.2V |
| Working Voltage | 2.75–4.2V |
| Internal Resistance | ≤38mΩ |
| Recharge Cycles | Up to 1000 |
| Size | 18.5 × 65.5mm |
| Weight | 46g ±1g |
| Protected | Optional (PCB available) |
| Shell | Explosion-proof metal casing |
| Operating Temperature | -20°C to +60°C |
| Packaging | 200pcs/box (43 × 21 × 16cm) |
Applications
Primary Uses:
The Lii-36S+ is perfect for flashlights, power banks, portable fans, and cameras, offering dependable 3.7V output for long operational use.
Extended Benefits:
Ideal for wireless tools, smart instruments, and energy storage systems, ensuring high efficiency with low internal loss.
Compatibility / Upgrade:
Fully compatible with LiitoKala smart chargers such as Lii-100, Lii-202, and Lii-500. Available in Nickel, Pointed, or PCB-protected versions for custom battery pack assembly.
Product FAQ
What is the real capacity of the Lii-36S+?
The Lii-36S+ provides an actual capacity between 3500–3600mAh, depending on discharge conditions.
Is this a protected battery?
The standard version is unprotected, but PCB-protected versions are available for devices that require added safety.
How many times can it be recharged?
The Lii-36S+ supports up to 1000 recharge cycles under proper charging conditions.
What devices are compatible with this battery?
It is suitable for flashlights, cameras, power tools, and portable devices that use 18650 Li-ion cells.
Does it include safety features?
Yes, it features an explosion-proof valve and robust shell structure for enhanced operational safety.







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