High-drain power in a compact 2x2 square layout for your custom DIY battery packs.
This EVE 25P 4S 18650 Battery Pack is a pre-assembled bare cell configuration, featuring four genuine EVE 18650-25P high-drain cells arranged in a space-saving 2x2 square series (4S1P) with spot-welded nickel tabs. It delivers a nominal 14.8V voltage (16.8V full charge) and a 2500mAh capacity, with a powerful 30A continuous discharge (12C) capability.
The square layout makes this pack ideal for custom projects where a long, linear 4-cell pack won't fit.
IMPORTANT: This is a BARE CELL PACK.
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No BMS (Protection Board) is included.
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No wires or connectors are attached.
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The nickel tabs are pre-welded at specific positions (see image for polarity).
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You must have the skills to solder your own connections and install an external 4S BMS before use. Never use or charge this pack without proper protection.
Key Features
Genuine EVE 25P Cells: Authentic high-drain 18650 cells, rated for high-current applications.
30A Continuous Discharge (12C): Delivers explosive power for demanding DIY projects, RC models, or custom power tools.
Space-Saving 2x2 Square Layout: Ideal for fitting into tight, square-shaped battery compartments.
Pre-welded Nickel Tabs: Comes with pure nickel strips spot-welded to the terminals, ready for you to solder your wires or build a battery pack.
4S Series Configuration (14.8V): Provides the higher voltage required for 16V applications.
Parameters
*Dimensions are approximate. Please allow ±1-2mm tolerance.
Applications
Recommended For:
DIY Battery Packs: For building custom 14.8V power packs for robotics, power tools, or portable devices where a square fit is needed.
RC Models & Airsoft: Suitable for high-current RC cars, boats, or Airsoft AEGs (requires proper wiring and BMS).
Custom High-Drain Projects: Spot welders, portable jump starters, or any project demanding 30A bursts.
Not Recommended For:
Beginners or Plug-and-Play Users: If you cannot spot-weld, solder, and install a BMS, do not buy this product.
Devices Requiring a Finished Pack: This will not fit directly into standard battery compartments without custom wiring.
Vaping (Unprotected): Using bare, unprotected cells in mechanical mods is extremely dangerous and not recommended.
FAQ
Q1: Does this battery have a protection board (BMS)?
A: No. This is a bare cell pack. You must install an external 4S BMS to protect against overcharge, over-discharge, and short circuits.
Q2: Does it come with wires?
A: No. It only includes spot-welded nickel tabs. You will need to solder your own wires or spot-weld your connections.
Q3: How do I wire this 2x2 square pack?
A: Please refer to the product image for polarity (B+, B-, etc.). You will need to connect the BMS according to standard 4S series wiring logic.
Q4: What is the actual discharge current?
A: The EVE 25P cells are rated for a continuous discharge of 30A (12C). However, the actual current you can draw will depend entirely on the BMS and wiring you install.
Q5: What are the dimensions?
A: The four cells are arranged in a 2x2 square, measuring approximately 36.8mm (Length) x 36.8mm (Width) x 65mm (Height).
