Samsung INR18650-25R - High-drain lithium-ion battery (2500 mAh)

The Samsung INR18650-25R (often simply called "Samsung 25R") is one of the best-known and most proven high-current batteries on the market. Recognisable by its typical green cover, it is regarded as the "all-rounder" for power-hungry applications. With a capacity of 2500 mAh and an enormous constant discharge current of 20 amps, it bridges the gap between pure high-capacity batteries and extreme high-drain cells. It is the standard choice for power tools, powerful e-cigarettes and bright torches.

Highlights at a glance

• High current load capacity (High Drain): This battery delivers a constant 20 amps without overheating. Short-term (pulse) even up to 100A is possible. This makes it ideal for devices that need "power", such as cordless screwdrivers or sub-ohm vapers.
• Safe INR chemistry: The lithium nickel manganese cobalt oxide chemistry used (LiNiMnCoO2) is considered more thermally stable and safer than conventional Li-Co cells (ICR), which is vital at high currents.
• Good balance: With 2500 mAh it offers a solid compromise. It lasts longer than pure power cells (which often only have 1500-2000 mAh), but the voltage does not sag as much under load as cells with 3000+ mAh.
• Low internal resistance: This keeps the battery relatively cool even under high loads and the voltage remains stable ("low voltage drop"), ensuring consistent performance.
• Industry standard: As this battery is used millions of times in powertools (e.g. Bosch, Makita battery packs), it is extremely reliable, cycle-resistant and usually very attractively priced.
• Unprotected construction: It is a Flat-Top cell without protection electronics (PCB). This allows for high current flow, but requires responsible handling and suitable chargers.

The favourite for "vapers" and power tools

While the Samsung 30B (from your previous enquiry) is a long-distance runner, the 25R is the sprinter. When you pull the trigger of your cordless screwdriver or activate the turbo mode of a torch, high currents flow instantly. A normal battery would immediately collapse here (voltage drop). The 25R delivers the energy effortlessly in such cases.
 

Features

FAQs about the Samsung INR18650-25R

Is this battery suitable for e-cigarettes?

Yes, absolutely. The 25R is one of the most popular batteries among vapers. With 20A continuous load, it is safely suitable for almost all regulated battery mods and many mechanical mods (within reasonable resistance range).

What is the difference to the Samsung 30Q?

The Samsung 30Q (pink) is the modern successor in spirit.

• 25R (Green): 2500 mAh, gets less hot under extreme loads, very robust.
• 30Q (Pink): 3000 mAh, lasts longer under moderate load. For absolute high-current safety, many still go for the 25R; for longer runtimes, choose the 30Q.

Do I need a special charger?

No. Unlike the 30B (4.35V), the 25R is a standard battery with 4.2 volt end-of-charge voltage. Any normal Li-ion charger (Nitecore, Xtar, etc.) works perfectly.

Can I use it in torches?

Yes, for powerful lamps. Many modern LED lamps with over 2000 lumens require such high-drain batteries to reach the turbo mode. Note: As it is a Flat Top (flat positive terminal), it may not work mechanically in some lamps if they require a protruding positive terminal (Button Top). Please check this beforehand.