BAK N21700CG-50 21700 Li-ion Battery 5000mAh 3.6V 10A Box of 130

Get a full factory sealed box of 130 brand-new BAK N21700CG-50 21700 lithium-ion batteries — perfect for battery builders, OEMs, and DIY power projects. These high-capacity cells offer dependable performance and are ideal for building large packs.

🔋 Specifications:

• Model: BAK N21700CG-50

• Quantity: 130 batteries (sealed box)

• Cell Size: 21700 (21mm x 70mm)

• Nominal Voltage: 3.6V

• Capacity: 5000mAh (5Ah)

• Max Continuous Discharge: 10A

• Chemistry: Li-ion (NCA)

• Top Type: Flat Top

• Rechargeable: Yes

• Protection Circuit: None (unprotected)

✅ Features:

• Genuine BAK cells – OEM grade quality

• High energy density and long cycle life

• Ideal for large battery packs, e-bikes, solar storage, tools, and more

• Ships in manufacturer box with protective packaging

⚠️ Important Notes:

These are unprotected industrial cells and should only be used with proper battery management systems (BMS). Not intended for individual consumer use without protection.

📦 Included:

• 130x Brand New BAK N21700CG-50 Batteries

• Original Manufacturer Box (sealed)

Ships fast from the USA. Message with questions or bulk inquiries!

Battery Warning

Warning: Lithium ion batteries may explode or burn due to improper use. Using these batteries for purposes not intended by the manufacturer, including outside a battery pack and/or without a BMS, may cause severe injury and damage. We are not responsible for any injuries caused by lithium ion batteries - use at your own risk.

All rechargeable batteries have inherent risks under any circumstance. Use caution with working with li-ion batteries (lithium-ion), LiPo (lithium ion polymer), and any rechargeable cells (together "rechargeable batteries"), as they have dangerous charging characteristics and are known to explode or burn if mishandled. A purchaser and user of rechargeable batteries should educate themselves on rechargeable batteries, especially as to charging, discharging, assembly, and storage. Learn more about proper storage and care for rechargeable batteries here. We are not responsible for any damage caused by the misuse or mishandling of rechargeable batteries.

Here are a few tips:

• Never completely discharge batteries (usually below 2.5V for li-ion or 2.0V for LiFePO4, check datasheet)
• Charge fully (usually to 4.2V for lithium ion or 3.6V for LiFePO4) before first use
• Never charge batteries to more than their full charge voltage
• Do not charge unattended
• Do not store your li-ion batteries fully charged for an extended period of time (weeks or more)
• If you must store your battery for a long time, only store in a case or individual box in a cool and dry place at approximately 3.5-3.7V for li-ion or 3.2V for LiFePO4
• Use only high quality battery chargers
• Do not expose to heat
• Do not connect the positive contact to the negative contact without an appropriate load
• Never exceed the battery's specifications
• Never try to charge or discharge li-ion batteries with battery chargers that are not made for li-ion batteries
• Always charge these batteries on and within fireproof material
• Never leave rechargeable batteries in a recharging station unattended
• Do not use any rechargeable battery or charger if any visible damage is present, or if known mishandling, accidental or otherwise, has occurred
• Always store and transport rechargeable cells in a safe, non-conductive container (never keep a spare battery loose in a pocket, purse, etc. and always use protective cases)
• Properly dispose of all battery cells and chargers in accordance with local laws and mandates (if you're unsure, contact your local municipality)
• If a rechargeable battery overheats, hisses, or bulges, immediately quarantine the battery from any combustible materials - ideally, take the battery outside
• If a rechargeable battery catches fire, the FAA recommends pouring water or soda on the battery and surrounding areas - ideally, use a foam extinguisher to quell the fire

By purchasing this product, you agree that seller makes no warranties whatsoever with respect to the goods sold on this website, including any (a) warranty of merchantability or (b) warranty of fitness for a particular purpose, whether express or implied by law, course of dealing, course of performance, usage of trade or otherwise. Buyer acknolwledges that it has not relied upon any representation or warranty made by seller, or any other person on the seller's behalf. If purchasing for resale, buyer assumes all responsibility and agrees to forward all notifications and warnings to the purchaser.