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The “Workhorse” of Lithium-Ion.
The Samsung 25R (INR18650-25R) is widely considered one of the most reliable and versatile 18650 batteries ever made. While other batteries sacrifice power for capacity, the 25R delivers a massive 20 Amps of continuous discharge while still providing 2500mAh of energy.
Why choose the Samsung 25R?
Minimum Voltage Sag: Maintains high voltage even under heavy loads, ensuring your devices run stronger for longer.
Cooler Operation: The INR chemistry allows the cell to run cooler than standard ICR batteries during rapid discharge.
Cycle Life: Known for retaining performance even after hundreds of charge/discharge cycles.
Recommended For:
This is the go-to battery for high-torque power tools (drills, saws), robotics, and high-lumen LED flashlights that require a stable, high-current draw.
Use this table for the “Specifications” tab in WooCommerce.
| Specification | Details |
| Manufacturer | Samsung SDI |
| Model | INR18650-25R (25R5) |
| Chemistry | INR (Lithium Nickel Manganese Cobalt Oxide) |
| Nominal Capacity | 2500mAh |
| Continuous Discharge Rating (CDR) | 20A Max |
| Nominal Voltage | 3.6V |
| Max Charging Voltage | 4.20V ± 0.05V |
| Discharge Cut-off Voltage | 2.5V |
| Standard Charging Current | 1.25A |
| Max Charging Current | 4.0A |
| Terminal Type | Flat Top |
| Protected | No (Unprotected Cell) |
| Dimensions | 18.3mm (Diameter) x 65.0mm (Length) |
| Weight | 45.0g Max |
Please include this section in your product description or a dedicated “Safety” tab, as selling loose Li-Ion cells carries liability.
⚠️ BATTERY SAFETY WARNING:
Do not carry loose batteries in pockets, purses, or bags where they can touch metal objects (keys, coins). This will create a short circuit and may cause fire or explosion.
Always use a proper plastic battery case for transport.
Do not use if the wrapper (PVC shrink) is damaged or peeling.
Do not leave on a charger unattended.
This is an unprotected flat-top battery meant for use in protected battery packs or devices with a built-in BMS (Battery Management System).
At USA Batteries, we are committed to providing fast, free, and reliable shipping on every order. Below, you’ll find detailed information about our shipping process, delivery timelines, carriers, and what to do if your order experiences an issue.
Shipping is completely free on all orders — no minimum purchase requirements, no hidden fees, and no surprise charges at checkout. We believe in transparent pricing so you can shop with confidence.
Most orders are shipped via USPS (United States Postal Service), which provides fast and affordable nationwide delivery. For large, heavy, or bulk orders, we may use FedEx or UPS to ensure safe and efficient handling.
Please Note: Some oversized products or wholesale shipments may require alternative carriers based on size, weight, or destination.
If your order is time-sensitive, please contact us before purchasing, and we’ll do our best to assist.
Currently, we do not offer paid expedited shipping options. However, many of our USPS shipments use Priority Mail, which generally arrives within 2–3 business days for most U.S. locations.
If you need a faster delivery option, reach out to us at cs@usabatteries.com, and we’ll check if a special arrangement can be made.
At this time, we only ship within the United States. We do not offer international delivery options.
Yes! We gladly deliver to PO Boxes, as USPS handles most of our shipments.
If your order requires FedEx or UPS (usually for larger packages), we may contact you for a physical street address.
You will receive an email with a tracking number as soon as your order ships.
You can also check your order status anytime on our Track Your Order page.
If your tracking number shows “Delivered” but you haven’t received your package:
If your package is still missing after these steps:
Insurance Claims: All USPS shipments are insured. Any claims for lost or damaged packages must be filed with USPS. We will guide you through the process to ensure a resolution.
Your satisfaction is our priority. If you experience any shipping issues, we will work closely with USPS or the relevant carrier to resolve the situation promptly and ensure your order reaches you safely.
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