10-Pack Sunpower 21700 5000mAh 30A (6C) High Drain Flat Top Battery – For E-Bike, Power Tools, Flashlights & DIY Packs
Description
Short Description
Power your high-demand devices with the Sunpower 21700 5000mAh 30A flat top battery. Engineered for sustained high-current output, this 10-pack delivers a massive 5000mAh capacity and a true 30A continuous discharge (6C). It is the ultimate power solution for e-bike battery packs, cordless power tools, high-output 21700 flashlights, RC models, and DIY energy storage projects. The flat top design ensures universal compatibility with spring-loaded contacts and makes spot-welding nickel strips clean and reliable. With low internal resistance and excellent cycle life, these cells provide consistent, long-lasting power when you need it most.
Key Features
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5000mAh Ultra-High Capacity – One of the highest capacity cells in the high-drain category, significantly extending runtime for power-hungry devices.
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30A Continuous Discharge (6C) – Delivers stable, high current output for electric motors, high-power LEDs, and inverters with minimal voltage sag.
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Flat Top Design – Fits all standard 21700 battery holders, spring-contact chargers, and flashlights; flat positive terminal is ideal for spot-welding into custom packs.
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Excellent Cycle Life – Retains ≥70% capacity after 500 standard charge/discharge cycles, reducing long-term replacement costs.
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Low Internal Resistance (≤15mΩ) – Minimizes energy loss as heat, keeps your device running cooler, and maximizes power delivery under load.
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10-Pack Bulk Value – Perfect quantity for building a 36V e-bike pack, rebuilding tool battery packs, or stocking up for multiple high-drain devices.
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Wide Application Range – Suitable for e-bikes, electric scooters, cordless drills, LED flashlights, RC cars, portable power stations, and more.
Parameters
| Parameter | Specification |
|---|---|
| Model | Sunpower 21700 5000mAh 30A |
| Typical Capacity | 5000 mAh (0.2C discharge to 2.5V) |
| Minimum Capacity | Approx. 4800 mAh |
| Nominal Voltage | 3.6 V (typical operating 3.7 V) |
| Max Continuous Discharge | 30 A (6C) (cell temperature ≤ 80°C) |
| Max Pulse Discharge | Up to 40-50 A (short burst, monitor temperature) |
| Discharge Cut-off Voltage | 2.5 V (do not over-discharge) |
| Standard Charge | CC-CV, 0.5C (2500 mA) to 4.2 V, cut-off 50 mA |
| Max Charge Current | 1C (5000 mA); fast charge above 1C requires temperature monitoring |
| Internal Resistance | ≤ 15 mΩ (AC 1 kHz) |
| Cycle Life | ≥ 500 cycles (to 70% capacity, 0.5C charge / 1C discharge) |
| Operating Temperature (Discharge) | -20°C to 60°C (ensure proper cooling for sustained 30A) |
| Top Type | Flat Top |
| Dimensions | Approx. 21.2 mm diameter × 70.3 mm length |
| Weight (single cell) | Approx. 69 g |
| Package Includes | 10 × Sunpower 21700 5000mAh cells in protective packaging |
Applications
Recommended For
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E-Bike & E-Scooter Battery Packs: The 30A continuous discharge supports most 250W–750W motors, and 5000mAh capacity reduces the number of parallel cells needed in a pack. Always use a properly rated BMS.
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Cordless Power Tools: Impact drivers, drills, circular saws, and high-torque wrenches. Ideal for rebuilding tool battery packs with longer runtime.
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High-Output 21700 Flashlights: FET-driven or multi-emitter torches requiring sustained current up to 25A for maximum brightness; the large capacity enables extended high-mode runtime.
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RC Cars, Boats & Airplanes: Provides strong burst power and significantly longer play sessions compared to lower-capacity high-drain cells.
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DIY Portable Power Stations: Build high-capacity DC power banks or AC inverters for camping, fieldwork, or emergency backup.
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Garden Tools & Robotics: Any 21700-compatible high-drain application where both runtime and current matter.
Not Recommended For
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Extreme High-Drain Applications (continuous >40A): Choose 40A–45A rated 21700 cells (e.g., BAK 45D, Samsung 40T) if your device demands sustained current beyond 30A.
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Low-Power, Ultra-Long-Runtime Devices: For solar lights, sensors, or clocks, use a high-capacity low-drain cell (e.g., 5000mAh 10A 21700) to save cost.
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18650-Only Devices: The 21700 format is physically larger; verify your device’s battery compartment before ordering.
FAQ
Q: What does 6C mean, and how is it related to 30A?
A: “C” rating is the discharge current as a multiple of the cell’s capacity. Since this cell has a capacity of 5000mAh (5Ah), 6C equals 5Ah × 6 = 30A continuous discharge. It indicates the cell can safely deliver 30A without excessive heat or voltage sag.
Q: Can I use this battery in my 18650 device?
A: No. This is a 21700 cell (21mm diameter, 70mm length), which is thicker and longer than an 18650 (18mm × 65mm). It will not fit unless your device specifically supports 21700 cells. Always check your device’s specifications.
Q: Is this a protected battery?
A: No, it is an unprotected flat top cell. This is standard for high-drain cells to allow unrestricted current flow. For multi-cell packs, you must install a BMS rated for at least 40A. For single-cell use, ensure your device has built-in protection.
Q: How many cells do I need for a 36V e-bike battery?
A: A typical 36V e-bike pack uses a 10S configuration (10 cells in series). This 10-pack provides exactly the number of cells needed for one series string. Depending on your capacity requirements, you may need additional parallel strings (e.g., 10S2P requires 20 cells). Always use matched cells and a suitable BMS.
Q: Can I solder wires directly to the battery?
A: Never solder directly onto lithium-ion cells. The extreme heat can damage internal components and lead to failure or safety hazards. Use a spot welder to attach nickel strips. For wire connections, spot-weld nickel tabs with pre-attached leads.
Q: How should I store these batteries long-term?
A: Store at 3.6–3.7V per cell (approximately 40-50% state of charge) in a cool, dry place. Use non-conductive storage cases to prevent accidental short circuits. Avoid storing fully charged or deeply discharged for extended periods.
Shipping and Returns
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Free Shipping: Enjoy free shipping on all orders over $65. For orders under $65, the shipping cost is $8.99.
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Delivery Time: Once shipped, orders typically arrive within 7–15 business days.
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Easy Returns: We want you to be completely satisfied. If you're not, you can return your product within 30 days of receiving your order. Please ensure the items are unused and in their original condition. For return instructions, please contact our support team.
Payment & Security
Payment methods
Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.
Security
Refund Policy
OneAndes Return & Refund Policy
At OneAndes, we are committed to providing high-quality cylindrical lithium-ion batteries for your drones, vacuums, garden tools, and other power needs. If you are not completely satisfied with your purchase, we are here to help. Please read our full return policy below before initiating a return.
1. Return Window
You have 30 calendar days from the date you received your item(s) to request a return. Any return request submitted after 30 days will not be eligible for a refund or exchange.
2. Eligibility Conditions
To qualify for a return, all items must meet the following conditions:
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Condition: Items must be unused, undamaged, and in the same condition that you received them.
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Packaging: Items must be returned in their original packaging with all accessories, manuals, and protective covers intact.
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Proof of Purchase: A valid receipt, order confirmation email, or proof of purchase must accompany all returns.
Non-Returnable Items:
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Batteries that have been installed, used, or show any signs of wear.
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Items marked as “Final Sale” or “Clearance” at the time of purchase.
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Customized or special-order products.
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Gift cards.
If a returned item fails to meet these conditions, we reserve the right to deny the return or charge a restocking fee.
3. How to Initiate a Return
Follow these steps to return your product:
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Contact Us: Email our support team at support@oneandes.com with your order number and the reason for return. We aim to respond to all return requests within 24 hours on business days.
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Receive RMA: We will provide you with a Return Merchandise Authorization (RMA) number and return instructions. Do not ship any item without an RMA number.
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Pack Securely: Place the item in its original packaging, include all accessories, and clearly write the RMA number on the outside of the box.
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Ship to Our US Warehouse: Ship the package to the following address:
OneAndes Returns
10320 6th St
Rancho Cucamonga, CA 91730
USA*Important: Lithium-ion batteries are classified as hazardous materials (Class 9). Please follow the shipping guidelines provided in Section 4 below. We recommend using a trackable shipping service and purchasing shipping insurance, as we cannot guarantee receipt of your returned item.*
4. Return Shipping Costs
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Defective or Incorrect Items: If the item you received is defective, damaged in transit, or different from what you ordered, OneAndes will cover the return shipping cost. In this case, we will provide you with a prepaid return shipping label.
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Buyer’s Remorse / Non-Defective Returns: If you are returning an item for any other reason (e.g., no longer needed, ordered the wrong model), you are responsible for the return shipping costs. You must prepay the return shipping cost using a trackable carrier that accepts lithium batteries. We do not provide prepaid return labels for non-defective returns.
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Lithium Battery Shipping Regulations: By law, all returns must be shipped in compliance with applicable dangerous goods regulations. We will provide guidance on proper packaging and labeling. Failure to comply may result in carrier refusal, seizure, or additional fees. We are not responsible for returned items lost or rejected by the carrier due to improper shipping.
5. Refunds
Once we receive and inspect your return at our Rancho Cucamonga, CA facility, we will notify you via email of the approval or rejection of your refund.
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Approved Refunds: If approved, your refund will be processed to your original method of payment within 5 to 10 business days. Please note that depending on your bank or credit card issuer, it may take additional time for the credit to appear on your statement.
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Partial Refunds: In certain situations, only partial refunds may be granted:
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Items not in original condition, missing parts, or damaged for reasons not due to our error.
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Items returned more than 30 days after delivery (reviewed on a case-by-case basis).
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Non-Refundable Fees: Original shipping charges are non-refundable unless the return is due to our error (defective product or incorrect shipment).
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Restocking Fee: We do not charge a restocking fee for defect-free returns, but we may deduct the return shipping cost, which will be deducted from your refund.
6. Exchanges
We replace items only if they are defective or damaged upon arrival. If you need to exchange a defective item for the same product, please contact us at support@oneandes.com. Exchanges are subject to product availability.
If you ordered the wrong battery size or model, please follow the standard return process above and place a new order for the correct item.
7. Damaged or Missing Items
If your package arrives visibly damaged, please take photos of the package before opening and contact us immediately. We will work with the shipping carrier to file a claim and arrange for a replacement or refund. Damaged or missing item claims must be reported within 7 calendar days of delivery. For immediate assistance, you may also call us at (213) 316-8849.
8. Order Cancellation
You may cancel your order without penalty if it has not yet been shipped. To cancel, email us at support@oneandes.com as soon as possible. If the order has already been processed or shipped, you will need to follow the standard return process upon receipt.
9. Warranty
All OneAndes batteries are backed by a 12-month limited warranty against defects in materials and workmanship. This warranty does not cover damage caused by misuse, improper charging, unauthorized modifications, normal wear and tear, or use outside of manufacturer specifications. For warranty claims, please contact our support team.
10. Contact Us
If you have any questions about our Return & Refund Policy, please reach out:
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Email: support@oneandes.com
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Phone: (213) 316-8849 (Mon-Fri, 9 AM – 5 PM Pacific Time)
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Mailing Address: 10320 6th St, Rancho Cucamonga, CA 91730, USA
We aim to respond to all inquiries within 24 hours during business days. Please include your order number for faster assistance.