BTCAP 21700 Batteries

BTCAP 21700 batteries are value-focused lithium-ion cells that balance capacity and output — a practical option for pack builders who want solid performance without a premium price.

The 21700 format offers more capacity and energy headroom than the smaller 18650 in the same familiar cylindrical shape, making it a strong foundation for modern battery packs that need both runtime and current. BTCAP's 21700 cells aim at that middle ground — usable capacity paired with strong discharge for general high-drain and pack-building use.

Key features

• Value-focused 21700 lithium-ion cells
• Balance of capacity and discharge for versatile builds
• 21700 format — more capacity and energy than 18650
• Suited to general high-drain and pack-building applications

Common applications

• Custom and DIY 21700 pack builds
• Power-tool and high-drain electronics packs
• E-bike and light mobility builds
• General-purpose high-output applications