This is arguably the most widely sold and respected 18650 form factor size cell on the market, still today. This cell is of very high quality and has a very economical price point to book-end it. This is an excellent balanced cell in terms of performance and reliability. Also this cell has a very good equilibrium with a moderate-high capacity of 2,500 mAh in energy, while having a high maximum continuous discharge/drain rating of 20 amps (Without any temperature cut involved). This cell is very stable, even when it's pushed to its max rating. This cell has about everything you could desire in a Li-Ion cell, as you can see from some of its attributes. It has many uses such as: power packs, high-output power banks, BMS's, power tools, and high powered flashlights as well. This cell has a much safer battery chemistry makeup than cells from the past, which make it more stable and much safer. This cell is often classified as a "Goldilocks" cell, because of its versatility and all of its attributes. This cell has passed the test of time and checks almost every box that you can reasonably image. There is no wonder why it has such a venerable history and a consumer favorite.
Samsung 25R Specs:
Model: Samsung 25R / INR18650-25R
Size: 18650
Style: Flat Top
Protected: No
Rechargeable: Yes
Nominal Capacity: 2500mAh
Continuous Discharge Rating: 20A
Nominal Voltage: 3.6V
Approximate Dimensions: 18.33mm x 64.85mm
Approximate Weight: 43.8g
Warning:
Use only a suitable external battery charger.
Always turn off your Mods or E-cig before storing it.
Protect unused batteries wherever they are stored with a suitable cover or case. (Always keep the battery in designated case after using )
Do not use a damaged or scratched battery.
Do not use a battery beyond its amperage limit.
Do not put a battery directly in the pocket.
Do not place a battery in contact with metal objects.
Do not disassemble, drill, squeeze, short-circuit or expose to water or excessively high temperatures.