2-Pack Vapcell P1838A 18650 3800mAh 10A USB-C Rechargeable Battery Button Top – Protected Cell for Flashlights, Headlamps & Doorbells
Description
Description
Get the perfect balance of capacity and convenience with the Vapcell P1838A, a 3800mAh 18650 battery featuring a built-in USB-C charging port. This 2-pack delivers approximately 9% more runtime than standard 3500mAh cells while eliminating the need for a dedicated charger—simply plug any USB-C cable directly into the battery to recharge from a wall adapter, power bank, car charger, or laptop. Built around a premium high-capacity cell core, it provides extended runtime for LED flashlights, headlamps, smart doorbells, and portable fans. Integrated overcharge, over-discharge, and short-circuit protection ensures safe, worry-free operation, while the button top design guarantees reliable contact in Fenix, Streamlight, and most other major flashlight brands. For users who want more capacity than 3500mAh without stepping up to the premium 4000mAh tier, the P1838A is the smart middle ground.
Key Features
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Built-in USB-C Charging Port – Recharge directly from any standard USB-C power source. No external 18650 charger required. USB-C offers reversible plugging and improved durability over older Micro-USB designs. The built-in LED glows red while charging and turns green when fully charged.
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3800mAh Extended Capacity – Delivers approximately 9% more runtime than standard 3500mAh cells. The ideal upgrade for users who find 3500mAh slightly insufficient but do not need the absolute maximum 4000mAh.
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Integrated Safety Protection – Built-in circuit guards against overcharge (4.2V), over-discharge (2.5V), short circuit, and overcurrent (10A limit), ensuring safe and reliable operation in any compatible device.
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Button Top Design – Raised positive terminal ensures reliable electrical contact in Fenix, Streamlight, and most other 18650 flashlights and devices requiring a button top.
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LED Charging Indicator – Convenient built-in LED shows charging status at a glance: red means charging, green means fully charged and ready to use.
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2-Pack Convenience – Perfect for keeping a spare always ready. Power your flashlight and headlamp, or your doorbell and fan, with matching extended-capacity cells.
Parameters
| Parameter | Specification |
|---|---|
| Model | Vapcell P1838A |
| Cell Core | High-capacity 18650 (3800mAh class) |
| Typical Capacity | 3800 mAh (0.2C discharge to 2.5V) |
| Minimum Capacity | ~3700 mAh |
| Nominal Voltage | 3.6 V (typical operating 3.7 V) |
| Max Continuous Discharge | 10 A (limited by built-in protection circuit) |
| Protection Functions | Overcharge (4.2V cutoff), Over-discharge (2.5V cutoff), Short Circuit, Overcurrent |
| USB Charging Input | USB-C port, 5V / 1A–2A recommended |
| Charging Indicator | Built-in LED (Red = Charging, Green = Fully Charged) |
| Discharge Cut-off Voltage | 2.5 V (automatic protection cutoff) |
| Internal Resistance | Approx. 60–80 mΩ (including protection circuit and USB-C module) |
| Cycle Life | ≥ 500 cycles (to 80% capacity) |
| Operating Temperature (Discharge) | -20°C to 60°C |
| Charging Temperature | 0°C to 45°C |
| Top Type | Button Top |
| Dimensions | Approx. 18.6 mm diameter × 71.0 mm length (~6mm longer than standard unprotected 18650) |
| Weight (single cell) | Approx. 54 g |
| Package Includes | 2 × Vapcell P1838A USB-C rechargeable batteries |
Applications
Recommended For
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LED Flashlights & Tactical Torches: Perfect for Fenix, Streamlight, and most other brands requiring a button top 18650. The 3800mAh capacity provides a meaningful runtime upgrade over 3500mAh cells—ideal for extended trips, professional use, and anyone who wants to charge less often.
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Headlamps for Outdoor & Professional Use: Ideal for camping, running, caving, and industrial work. The protection circuit prevents over-discharge damage, and USB-C enables easy field recharging from a power bank or car charger.
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Smart Doorbells & Wireless Security Cameras: Many video doorbells use 18650 cells. The P1838A provides extended runtime between charges, and the USB-C port allows easy periodic recharging without removing the battery.
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Camping Lanterns & Emergency Lights: Any USB-C power source becomes your charger. The 3800mAh capacity ensures lights stay on through extended power outages.
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Portable Fans & Travel Gadgets: Minimize accessories—no separate charger to carry. One USB-C cable charges your phone and your spare batteries.
Not Recommended For
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High-Power Vaping / Mechanical Mods: These require 15–35A unprotected cells. The 10A protection limit is insufficient for sub-ohm applications and will cut off power under heavy load.
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Cordless Power Tools: Drills, saws, and impact drivers demand 20–40A continuous current, far beyond this battery's 10A protection limit.
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RC Cars, Drones & High-Drain Models: These require 20–30A+ continuous current. This battery will not function and may trigger protection.
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Ultra-Compact Flashlights with Tight Battery Tubes: This battery measures approximately 71mm in length. Some ultra-compact flashlights may not close fully. Always verify your device can accommodate the extra length.
FAQ
Q: How does the 3800mAh compare to 3500mAh and 4000mAh cells?
A: The P1838A sits right in the middle. It delivers approximately 9% more runtime than a 3500mAh cell, while typically being more affordable than the 4000mAh flagship model. It is the perfect choice for users who find 3500mAh just slightly insufficient but do not want to pay the maximum premium for 4000mAh.
Q: How do I charge this battery?
A: Simply connect a standard USB-C cable to the charging port on the battery and plug the other end into any USB power source—a phone charger, power bank, laptop, or car adapter. The built-in LED glows red during charging and turns green when fully charged. A full charge takes approximately 5–6 hours.
Q: Will this fit my flashlight?
A: It fits most flashlights that accept button top 18650 cells. Due to the integrated USB-C charging port and protection circuit, this battery is approximately 71mm long—about 6mm longer than a standard unprotected 18650 (65mm). Most flashlights with spring-loaded contacts can accommodate this, but some ultra-compact models may not close completely. Please measure your device's battery tube before ordering.
Q: Can I also charge this battery in a regular 18650 charger?
A: Yes. The P1838A can be charged either through its built-in USB-C port or in any standard 18650 Li-ion charger that accepts button top cells. Both methods are safe and fully supported.
Q: Is this battery suitable for vaping or power tools?
A: No. Vaping devices and power tools require high continuous currents (typically 15–40A). The P1838A's protection circuit limits output to approximately 10A. Using it in such devices will cause the protection to cut off or may damage the battery. For these applications, use dedicated high-drain unprotected cells such as the Vapcell T28 (25A) or K30 (30A).
Q: How should I store these cells long-term?
A: Store at approximately 3.6–3.7V (40–50% charge) in a cool, dry place using a non-conductive battery case. Avoid storing fully charged or fully discharged for extended periods. The USB-C port makes it easy to top up before use after storage.
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
I keep these charged in my emergency supplies. The USB-C charging means I can top them up from any modern power source including solar.
The Vapcell P1838A offers excellent 3800mAh capacity with USB-C charging at a price that is more accessible than the 4000mAh version.
The overcharge, over-discharge, and short circuit protection give me confidence using these in my expensive Fenix and Nitecore lights.
Vapcell has combined 3800mAh capacity with modern USB-C charging. The P1838A is a fantastic option for flashlight and device users.
The slightly longer length due to protection and USB-C port fits my Fenix PD35, UC35, and HM65R without any issues.
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.