Overview
The LiitoKala Lii-35A-PCB 18650 3500 mAh battery is a protected Li-ion cell featuring an integrated PCB circuit for enhanced safety and stability. Built for users who need both high capacity and protection reliability, this model prevents overcharge, overdischarge, and short-circuit damage — making it ideal for flashlights, DIY packs, and power banks.
Main Features
- 3500 mAh nominal capacity and 3.7 V output for long runtime
- Built-in PCB protection against overcharge, overdischarge, and short circuit
- Low internal resistance ≤38mΩ for efficient performance
- Up to 1000 recharge cycles for long lifespan
- Slightly extended length (70.5 mm) due to protection board
- Customizable versions: Nickel tab / Pointed top / PCB-protected
- Original LiitoKala quality assurance for safety and consistency
Technical Specifications
| Parameter | Specification |
|---|---|
| Brand Name | LiitoKala |
| Model | Lii-35A-PCB |
| Type | Li-ion 18650 rechargeable battery |
| Nominal Capacity | 3500 mAh (3350 – 3650 mAh typical) |
| Nominal Voltage | 3.7 V |
| Limited Charge Voltage | 4.2 V |
| Working Voltage Range | 2.75 – 4.2 V |
| Internal Resistance | ≤ 38 mΩ |
| Recharge Cycles | Up to 1000 times |
| Protection Circuit | Overcharge, overdischarge, short circuit |
| Weight | 47 g ± 1 g |
| Size | Ø 18.5 mm × 70.5 mm |
| Customization Options | Nickel / Pointed / PCB |
| Package Details | 500 pcs/box (43 × 21 × 27 cm) |
Applications
The Lii-35A-PCB is widely used in flashlights, battery banks, and portable electronics that require additional circuit protection.
It’s a preferred choice for DIY battery builders needing stable and protected cells in e-bike, solar, or storage systems.
Thanks to its built-in protection and high capacity, it offers both safety and endurance for daily portable use and industrial battery assemblies.
Product FAQ
What’s the main difference between Lii-35A and Lii-35A-PCB?
The PCB version includes a protection board, safeguarding against overcharge, overdischarge, and short circuit.
Can it replace a standard unprotected 18650?
Yes, but note the extra length (70.5 mm) — ensure your device supports protected cells.
What devices benefit most from PCB-protected batteries?
Ideal for flashlights, power banks, and portable tools that lack built-in protection.
How should I charge it safely?
Use a dedicated LiitoKala charger such as the Lii-C4 Smart Charger.
Is PCB protection removable?
No, it’s permanently integrated to ensure long-term stability and safety.
Can it be used in multi-cell packs?
Yes, but ensure all protected cells have matching voltage and capacity before assembly.
Do you offer OEM or bulk packaging?
Yes — visit our Bulk Batteries page for wholesale inquiries.
Reviews
There are no reviews yet.