Maximize Your Device's Runtime
Maximize your device's runtime with the Samsung 35E 18650 Battery (Model: INR18650-35E). Renowned for its exceptional capacity, this 18650 lithium-ion cell delivers an impressive 3500mAh of reliable energy – one of the highest capacities available in the 18650 format. With a stable 8A continuous discharge (short pulse up to 15A), it is perfectly suited for devices that prioritize long runtime over extreme power output. This listing offers three terminal options to suit your specific needs: Flat Top for most modern devices (flashlights, DIY packs, e-bikes); Button Top for older equipment with spring-loaded contacts; and Nickel Tab – pre-welded with nickel strips for easy, solder-free DIY battery pack assembly. Whether you are powering a high-lumen flashlight for overnight hikes, building a long-range e-bike battery pack, or assembling a portable power station for camping, the Samsung 35E provides consistent, safe, and long-lasting energy. This listing includes one individual cell (multi-pack options available), offering the trusted quality and longevity that Samsung is famous for.
Key Features
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Ultra-High Capacity (3500mAh)
Delivers 3500mAh of reliable capacity, offering up to 40% more runtime than standard 2500mAh cells (like the 25R) and 17% more than 3000mAh cells (like the 30Q). It is one of the highest capacity 18650 cells on the market.
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Stable 8A Continuous Discharge
Provides a consistent 8A continuous current, ideal for high-lumen flashlights, camping gear, e-bikes, and portable power stations. Supports short pulse discharges up to 15A for brief power bursts.
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Three Terminal Options – Choose Your Fit
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Flat Top – Standard flat positive terminal, compatible with most modern flashlights, DIY battery packs, and e-bike packs.
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Button Top – Raised positive terminal (like a standard AA battery), required for older devices and specific flashlight models with spring-loaded contacts.
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Nickel Tab – Pre-welded nickel strips on the positive and negative terminals, ready for solder-free battery pack assembly, saving you time and effort.
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Long Runtime Focus
Engineered specifically for devices that need to run for hours or days without recharging, making it an excellent choice for camping, emergency preparedness, and extended outdoor activities.
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Authentic Samsung Quality
Premium-grade INR18650-35E cells from one of the world's most trusted battery manufacturers, ensuring exceptional cycle life, safety certifications, and consistent voltage stability.
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Versatile Performance
Suitable for a wide range of long-run applications, from high-power flashlights to e-bikes, portable power stations, and DIY battery projects.
Technical Parameters
Applications
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High-Lumen Flashlights & Headlamps
Powering tactical flashlights, searchlights, and headlamps for extended periods – perfect for night hiking, camping, and search & rescue.
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Portable Power Banks
Building high-capacity power banks for charging phones, tablets, and other USB devices multiple times on the go.
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Camping & Outdoor Gear
Running portable camping fans, LED lanterns, heated jackets, and other outdoor electronics for days without recharge.
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Electric Bikes (E-Bikes) / E-Scooters
Building battery packs for light e-bikes, e-scooters, and electric skateboards where maximum range is the priority.
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DIY Battery Packs
Creating custom 1S, 2S, 3S, or larger battery banks for robotics, drones, or portable power stations. The Nickel Tab option is perfect for solder-free assembly.
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Emergency Preparedness
Building backup power systems for emergency lights, radios, and essential devices during power outages or natural disasters.
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Portable Power Stations
Building compact yet high-capacity battery banks for off-grid living, camping, or emergency backup.
FAQ
Q1: What is the difference between Flat Top, Button Top, and Nickel Tab?
A:
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Flat Top has a flat positive terminal. It fits most modern devices (flashlights, DIY packs, e-bikes).
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Button Top has a raised positive terminal (like a standard AA battery). It is required for older devices and certain flashlights with spring-loaded contacts.
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Nickel Tab comes with nickel strips pre-welded to the positive and negative terminals. This is ideal for DIY battery pack building – no soldering required, just spot welding or direct connection.
Q2: What is the capacity of the Samsung 35E?
A: The Samsung 35E has a 3500mAh capacity (minimum 3400mAh), making it one of the highest capacity 18650 cells available from a major brand.
Q3: What is the continuous discharge rating?
A: The official continuous discharge rating is 8A. Short-duration pulse discharges can reach up to 15A, but it is not designed for continuous 8A+ operation. For safety and longevity, we recommend staying within the 8A continuous limit.
Q4: How does Samsung 35E compare to Panasonic NCR18650GA?
A: Both have a similar capacity – 3500mAh for the 35E and 3500mAh for the NCR18650GA. The Panasonic GA has a slightly higher continuous discharge (10A vs 8A). The Samsung 35E is generally more affordable and widely available. Choose the 35E if you want a reliable, high-capacity cell at a great value.
Model Comparison Table
Q5: Does this battery have a protection circuit (PCB/BMS) built-in?
A: No. The Samsung 35E is an unprotected cell. It relies on the external device or a BMS (Battery Management System) to handle overcharge, over-discharge, and short-circuit protection.
Q6: What charger should I use?
A: Use a dedicated intelligent Li-Ion charger designed for 3.6V/4.2V cells. Ensure the charger supports the correct voltage for your specific pack setup (e.g., 1S charger for single cells, 2S charger for 2 cells in series, etc.).
Q7: How do I identify positive and negative terminals?
A: The flat top (or the raised button on button top version) is the Positive (+) terminal. The bottom (the side with the shiny metal casing and a slight indentation) is the Negative (-) terminal.
Q8: Is the Samsung 35E still a good battery in 2026?
A: Absolutely. The Samsung 35E remains a top choice for high-capacity, long-runtime applications. Its 3500mAh capacity is still among the best in class, and its reliability and safety are well-proven. It continues to be a favorite for flashlight enthusiasts, campers, and DIY battery builders.
