BTW INR18650-26EC 18650 Li-ion Battery 3.7V 2600mAh Flat Top
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Prices updated: 13 Oct 2026
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About this product
A single 18650 lithium-ion cell from BTW with 2600 mAh capacity, 3.7 V nominal voltage and 9.62 Wh energy, with a flat top terminal. It suits battery packs, portable electronics and DIY power projects that need higher capacity in the standard 18650 size.
Specifications
- Chemistry
- Li-ion
- Size
- 18650
- Nominal voltage
- 3.7 V
- Capacity
- 2600 mAh
- Energy
- 9.62 Wh
- Terminal
- Flat top
Frequently asked questions
Is it the same size as other 18650 cells?
Yes, 18650 refers to the standard cylindrical format of about 18 mm diameter and 65 mm length, so it fits standard 18650 holders. Confirm the top type (flat or button) matches your holder.
How should I charge it safely?
Use a charger designed for Li-ion cells that stops at 4.2 V. Never short-circuit the terminals, and do not charge a cell that is swollen, damaged or overheating.
