2-Pack 21700 4000mAh 32A Flat Top Battery | No Sag, All Power for Turbo Lights, RC & Tools
Description
32A. 4000mAh. 70mm Flat Top.
You don't need a story. You need a battery that delivers. This 2‑pack of 21700 cells puts exactly what matters on the table: 32 amps of continuous current, 4000mAh capacity, and a flat‑top form factor that fits every serious 21700 device. No exaggerated pulse ratings disguised as continuous. No button tops that won't fit your tube. Just honest, brutal power in a standard 70.0mm × 21.4mm cylinder.
What This Cell Is (and Isn't)
This is a high‑drain cell for high‑drain applications. Turbo flashlights that pull 20–30A. RC cars and drones that demand instant throttle response. Cordless drills and impact drivers that need startup torque. It is NOT a low‑current energy cell for headlamps or doorbells. If your device doesn't hit at least 10A regularly, you're better off with a higher capacity, lower drain option. If it does, you've found your battery.
Why Numbers Matter
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32A Continuous — verified, not inflated. At 32A, voltage drop is minimal thanks to ≤18mΩ internal resistance. Your light stays bright, your motor keeps torque.
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4000mAh Capacity — 14.8Wh per cell. Enough to run a turbo flashlight for solid bursts, not seconds. Enough to finish a 10‑minute RC heat. Enough to drive hundreds of screws per charge.
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70.0mm × 21.4mm — industry‑standard 21700 flat top. Drops into any device designed for unprotected flat‑top cells. No spacers, no modifications.
Unprotected Flat Top — Know Your Gear
This is a bare cell. No protection PCB. No button. You provide the 4.2V charger and the device with low‑voltage cutoff. In return, you get the shortest possible length, the lowest possible resistance, and zero current bottlenecks. The cell itself handles over‑current, over‑pressure, and short circuits via built‑in PTC, vent, and CID. If you're not comfortable with unprotected cells, stop here. If you are, this is the cleanest power you can get.
2‑Pack = Flexibility
Build a 2S pack. Swap on the fly. Keep a spare in your bag. Two cells give you options without locking you into a case quantity you don't need.
Key Features
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32A Continuous Discharge — verified, sustained, no voltage collapse.
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4000mAh Real Capacity — 14.8Wh per cell. Runtime that counts.
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Standard 21700 Flat Top — 70.0mm × 21.4mm. No button, no PCB.
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≤18mΩ Internal Resistance — minimal sag, maximum efficiency.
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500+ Cycles — to 70% capacity under standard conditions.
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Passive Safety — PTC, safety vent, CID.
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2‑Pack — build, swap, backup.
Technical Parameters
| Parameter | Specification |
|---|---|
| Form Factor | 21700 Unprotected Flat Top |
| Nominal Capacity | 4000mAh (14.8Wh) |
| Nominal Voltage | 3.7V |
| Full Charge Voltage | 4.2V |
| Discharge Cut‑off | 2.5V |
| Max Continuous Discharge | 32A |
| Max Pulse Discharge | 40A (<5s) |
| Internal Resistance | ≤18mΩ (AC 1kHz) |
| Cycle Life | ≥500 (to 70%) |
| Dimensions | ~21.4mm Ø × 70.0mm |
| Weight | ~68g |
| Chemistry | NMC |
Applications
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Turbo Flashlights – FET drivers, multi‑emitter builds, SBT90.2 hot‑rods.
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RC Cars & Drones – 2S/3S racing packs, 1/8 scale truggies, FPV quads.
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Power Tool Rebuilds – 18V/20V drills, impacts, circular saws.
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DIY High‑Current Projects – Power banks, inverters, portable workstations.
FAQ
Q: 32A continuous — real?
A: Real. Verified. No marketing fluff.
Q: Why unprotected flat top?
A: Shortest length, lowest resistance. Fits all 21700 high‑drain devices. Use a 4.2V charger and a device with low‑voltage cutoff. The cell has built‑in PTC, vent, CID.
Q: Will this fit my 18650 light?
A: No. 21700 is larger. Your device must say "21700".
Q: Button top needed?
A: Most high‑performance devices want flat tops. If your device has a spring with a ring blocking a flat top, you need a button top. Check your manual.
Q: Storage?
A: ~3.6–3.7V (50% charge) in a plastic case. Check every 3 months.
Q: Air travel?
A: Yes. 14.8Wh per cell, well under the 100Wh limit. Carry‑on, terminals insulated.
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
With a constant current load at 32A, the cell delivered 3400mAh to 3.0V. Temperature 68¡ãC. Rating holds.
My Fenix now on turbo stays visibly brighter longer. These 21700 are a massive upgrade from 18650s.
Arrived in a plastic case, perfect voltage. After several cycles, capacity and IR remain identical. Will be a repeat customer.
These 4000mAh 32A cells power my handheld thermal for 6+ hours. Stable voltage until cutoff. Ideal for outdoor use.
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.