The EXOCELL 20700S battery is rebranded by various companies including Vapcell and Efest.

This is the larger 20700 form factor and sizing.

Specifications:

• Standard charging current: 1.5 A
• Model: INR20700S
• Discharge end voltage: 2.5 V
• Chemistry: INR.
• Nominal voltage: 3.6 V
• Country of Origin: China
• Nominal capacity: 3100 mAh
• Max. continuous discharge current: 25A
• Protection: Not Protected (Flat-Top)
• Charging voltage: 4.20 +/- 0.05 V

Warnings: Do not use if damaged, wrap torn, do not over discharge, overcharge, keep in pockets or bags close to metallic objects, leave in hot areas, direct sunlight. Use only in suitable devices. We recommend using in suitable devices with protection circuits. Usage in mechanical devices is entirely at users risk and not recommended without an expert knowledge of battery safety and Ohm's Law. Follow Li-ion battery safety guidelines.