EVE 35V 18650 Battery with Protection Board 3.7V 3500mAh – 4A Pre-wired with XH2.54 Connector for Flashlights, DIY Projects & Small Electronics
Description
High-capacity, safely protected power, ready to plug in.
This EVE 35V 18650 Battery is a pre-assembled, protected power solution designed for DIY electronics and small devices. It utilizes a genuine EVE 18650-35V high-capacity cell, delivering a nominal 3.7V and a substantial 3500mAh capacity.
Unlike bare cells, this battery features a built-in side protection board (BMS) that safeguards against overcharge, over-discharge, over-current, and short circuits. To ensure maximum safety, the protection board limits the continuous working current to 4A (with a peak of 8A).
Pre-wired with a default XH2.54 2-pin connector (red/black leads, 8-15cm), it is ready to drop into your projects. Important: While the underlying cell is capable of higher currents, the protection board limits this pack to 4A. It is not intended for high-drain power tools or devices drawing over 4A.
Key Features
Genuine EVE 35V Cell: Authentic high-capacity cell provides reliable 3.7V power and a massive 3500mAh capacity for longer runtime.
Built-in Protection Board (BMS): Comprehensive safety against overcharge, over-discharge, over-current, and short circuits.
Safe 4A Continuous Current: Designed for low-to-medium current devices. (Max continuous 4A, peak startup 8A).
Pre-wired & Plug-and-Play: Comes with a default XH2.54 2-pin connector (red/black leads, 8-15cm) for easy integration.
Compact Pack Size: Shrink-wrapped with the side protection board, measuring approx. 66mm length and 21.5mm diameter.
Parameters
| Parameter | Specification |
|---|---|
| Cell Model | EVE 18650-35V |
| Nominal Voltage | 3.7V (Full charge: 4.2V) |
| Nominal Capacity | 3500mAh |
| Continuous Working Current | ≤ 4A |
| Peak Startup Current | ≤ 8A |
| Protection Board | Yes (Overcharge, Over-discharge, Over-current, Short circuit) |
| Connector Type | XH2.54 2-Pin (Red + / Black -) |
| Wire Length | Approx. 8-15cm |
| Dimensions | Approx. 21.5mm (Diameter) x 66mm (Length)* |
| Weight | Approx. 50g |
*Dimensions are approximate and include the protection board and heat shrink wrap. Please allow ±1-2mm tolerance.
Applications
Recommended For:
DIY Electronics & Microcontrollers: Safe power for Arduino, ESP32, Raspberry Pi, and breadboard projects.
Portable Devices: Ideal for low-current devices like portable sensors, IoT nodes, and small wireless modules.
Custom Power Banks: Build your own safe, small-capacity power bank with protection already built-in.
Mini Fans & Small Gadgets: Suitable for devices drawing under 4A.
Flashlights (Low-Power): Suitable for standard LED flashlights that draw less than 4A.
Not Recommended For:
High-Drain Devices (>4A): Do not use in high-power flashlights, power tools, or devices drawing more than 4A continuously. The protection board will cut off power.
Vaping/Mechanical Mods: Not suitable for high-current vaping devices.
Devices Requiring Bare Cells: If your device's battery tray expects a standard flat-top cell without wires, this pack will not fit.
FAQ
Q1: What is the maximum discharge current of this battery?
A: Because it is equipped with a protection board, the continuous working current is limited to 4A (with a peak of 8A for short startups). It is not designed for high-drain devices.
Q2: The cell is rated for 10A, why is this pack limited to 4A?
A: The original EVE 35V cell can handle high discharge, but the added protection board is rated for a maximum continuous current of 4A to ensure safety and prevent overheating. Do not exceed this limit.
Q3: Does it have a protection board?
A: Yes, it has a built-in side protection board to prevent overcharge, over-discharge, over-current, and short circuits, ensuring safe operation.
Q4: What are the dimensions?
A: Because of the added protection board and heat shrink wrapping, the pack measures approximately 66mm in length and 21.5mm in diameter.
Q5: Can I change the connector to something else?
A: The default is an XH2.54 2-pin. We can potentially provide other connectors (like JST, PH2.0, or bare wires) upon request. Please contact us before ordering if you need a different connector.
Payment & Security
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Tested over-discharge and it cut at 2.5V exactly. No drama.
Swapped into an old C8 and it's like a new light. Runtime is great.
Used two in a parallel pack with a boost module. Balanced well.
Cheaper than buying a cell and a separate protection board, and it's pre-wired.
Protected 18650, 3500mAh, XH2.54, all as stated. No bait and switch.
Refund Policy
Last updated: November 3, 2026
Returns
Return eligibility depends on the items in your order.
Where returns are accepted, items must be returned in the same condition they were received, unworn or unused, with tags, and in their original packaging or as otherwise indicated in the return instructions. We may reduce your refund if the item has been used, damaged, or handled more than necessary.
Contact us to ask about return options and how to start a return.
How to start a return
Whether return or cancellation requests are accepted depends on the terms above and your rights under applicable law.
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Unless we state otherwise or applicable law requires otherwise, you are responsible for return shipping costs for change-of-mind returns.
Damages and issues
Please inspect your order when you receive it and contact us immediately if an item is defective or damaged, or if you received the wrong item.
Exceptions and non-returnable items
Some items may not be eligible for return, as stated in the return terms above or on the product listing, website, or in-store at the time of purchase.
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Exchanges
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Refunds
We will notify you after we receive and inspect your return and let you know whether the refund was approved. If approved, you will be refunded to your original payment method, unless otherwise stated. Your bank or payment provider may need additional time to process and post the refund.
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This policy does not limit any rights you may have under applicable consumer protection laws, including rights that may apply if goods are defective, not as described, not delivered within the required or agreed timeframe, or otherwise do not comply with applicable law.
Contact
To request a cancellation, start a return, inquire about a return, ask about an exchange or report damaged items, please contact us at support@powerpackhub.com or use the contact details in our contact information policy.