XTAR 21700 5000mAh 10A Button Top Battery | Protected High-Capacity Li-ion Cell for Flashlights (1/2 Pack Options)
Description
Product Description
This listing offers authentic XTAR 21700 5000mAh 10A high-capacity lithium-ion rechargeable batteries (available in 1 or 2-piece packs). Engineered with a strict commitment to "True Capacity, No False Labeling," this battery delivers a colossal 5000mAh (18000mWh) of genuine power with a 3.6V nominal voltage and a 4.2V charging cut-off. It supports a stable 10A continuous discharge current, making it an outstanding power source for high-performance tactical flashlights and moderate-power electronic cigarettes. Featuring a built-in high-strength dual-stainless steel protection board, it effectively prevents overcharging, over-discharging, and overcurrent damage. Remarkably, it maintains a capacity loss of less than 20% even after 500 recharge cycles. The button-top design ensures perfect electrical contact with mainstream high-drain devices. Whether you need a spare or a pair, choose the pack size that suits your needs.
Key Features
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True 5000mAh Capacity, No False Labeling: Delivers an uncompromised, measurable 5000mAh real capacity (18000mWh) with a 3.6V rated voltage.
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Reliable 10A Continuous Discharge: Provides a stable 10A continuous discharge current without significant voltage drops. Ideal for high-performance flashlights and 10A-rated electronic devices.
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Integrated High-Strength Stainless Steel Protection Board: Built-in stainless steel casing with an integrated PCB to prevent overcharge, over-discharge, and overcurrent, ensuring exceptional safety and durability.
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500 Cycle Long Lifespan: Engineered to retain over 80% of its original capacity even after 500 full charge/discharge cycles, far surpassing ordinary batteries that typically degrade by 40%.
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Button Top Positive Terminal: Features a button-top design for secure, reliable electrical contact with high-performance tactical flashlights, headlamps, and portable electronics.
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Flexible Quantity Options: Available in 1 or 2-piece packs, allowing you to perfectly match your daily usage or device-pairing needs.
Product Parameters
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Brand: XTAR
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Model: 21700 Rechargeable Li-ion Battery
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Nominal Capacity: 5000mAh (18000mWh)
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Nominal Voltage: 3.6V
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Charging Cut-off Voltage: 4.2V
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Max Continuous Discharge Current: 10A
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Protection Board: Built-in Dual Stainless Steel PCB (Overcharge, Over-discharge, Overcurrent Protection)
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Positive Terminal: Button Top
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Weight: 71g
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Dimensions: 21.5 ± 0.3mm (Diameter) x 74.5 ± 0.5mm (Height)
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Cycle Life Performance: Capacity loss less than 20% after 500 cycles.
Applications
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High-performance tactical flashlights, searchlights, and heavy-duty outdoor headlamps.
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High-power camping lanterns, portable survival gear, and emergency lighting equipment.
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Reliable power supply for portable radios, intercoms, and outdoor communication devices.
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(Note: Due to the built-in protection board and button-top design, this battery is designed for single-device use in consumer electronics. It is NOT suitable for DIY spot-welding into custom battery packs).
Frequently Asked Questions (FAQ)
Q1: What are the available pack options for this battery?
A1: You can purchase this battery in 1 or 2-piece packs. Please select the desired quantity from the variant options before checkout.
Q2: What does the 5000mAh capacity mean for my flashlight?
A2: 5000mAh is an extremely high capacity for a single cell. It provides roughly double the runtime of a standard 2500mAh 18650 battery, allowing your high-lumen flashlight to run for much longer periods before needing a recharge.
Q3: Is this battery protected and safe to use?
A4: Yes. It features a built-in high-strength stainless steel dual protection board that safeguards the battery against overcharging, over-discharging, and overcurrent damage, making it extremely safe for daily use.
Q4: How should I charge this protected 21700 battery?
A5: It is highly recommended to use a professional smart charger (such as XTAR chargers that support 21700 sizes) with full safety protections to charge this 3.6V battery to its 4.2V cut-off voltage. Avoid charging it directly inside devices that lack proper charge-control circuitry.
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
If you need maximum capacity with protection, this is the cell. XTAR's quality is evident in the construction.
My inspection flashlight runs on this 21700. I get a full 10-hour shift on medium. The button top is required and fits.
These compete with Samsung 50S but with a button top and protection. The 5000mAh is real. I've ordered 8 total.
My FPV goggle battery pack uses these. They outlast my flight batteries 3:1. Protected circuit prevents over-discharge.
Ordered two 2-packs. All four cells tested within 4950-5020mAh. Button tops are uniformly welded. XTAR quality control shines.
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.