21700A Lithium-Ion Rechargeable Battery – 4.2V 5000mAh High Capacity (Made in Japan)

21700A Lithium-Ion Rechargeable Battery – 5000mAh High Capacity Power Cell

The 21700A Lithium-Ion Rechargeable Battery is a high-capacity power solution designed for demanding devices in Bangladesh. With a massive 5000mAh capacity and stable voltage output, this battery is perfect for high-drain applications such as flashlights, power tools, EV battery packs, and DIY electronics.

Built with advanced lithium-ion technology, the 21700A delivers reliable performance, long runtime, and consistent power output. Its cylindrical design and high energy density make it a superior upgrade over traditional 18650 batteries.

Key Features of 21700A Battery

• 5000mAh high-capacity battery – longer runtime for demanding devices
• Stable voltage output – 4.2V (full charge) / 3.7V nominal
• High energy density – more power in a compact 21700 size
• Rechargeable design – supports multiple charge cycles
• Flat top structure – ideal for battery packs and advanced devices
• Durable and reliable – suitable for professional and DIY use

Performance & Usability

This battery is engineered for high-performance applications where stable voltage and long runtime are essential. Whether you’re powering high-lumen flashlights or building battery packs, the 21700A ensures consistent output and durability.

Who Should Buy This Battery?

• DIY enthusiasts building custom battery packs or electronics
• Users of high-power flashlights and tactical gear
• Professionals using cordless power tools
• Anyone needing a reliable, long-lasting rechargeable battery

Why Buy from Gadgeterians.com?

• 100% genuine product with quality assurance
• Cash on Delivery available across Bangladesh
• Fast delivery service nationwide
• 7-day replacement warranty for manufacturing defects
• Trusted gadget store with reliable support

Important Safety Notes

• This is an unprotected battery – use with proper Battery Management System (BMS)
• Avoid overcharging, short circuits, or physical damage
• Store in a cool, dry place when not in use

Frequently Asked Questions

Q: Can I use this battery in any device?

Only use it in devices that support 21700 batteries. Check compatibility before use.

Q: Is this battery protected?

No, it is an unprotected cell. A proper protection circuit or BMS is recommended.

Q: How long does it last per charge?

Battery life depends on device usage, but the 5000mAh capacity ensures longer runtime than standard cells.

21700A Battery Price in Bangladesh:

This high-capacity lithium-ion battery offers excellent performance and durability, making it a great choice for power users and professionals in Bangladesh.