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
-
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.
-
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.
-
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.
-
Button Top Design – Raised positive terminal ensures reliable electrical contact in Fenix, Streamlight, and most other 18650 flashlights and devices requiring a button top.
-
LED Charging Indicator – Convenient built-in LED shows charging status at a glance: red means charging, green means fully charged and ready to use.
-
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
Applications
Recommended For
-
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.
-
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.
-
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.
-
Camping Lanterns & Emergency Lights: Any USB-C power source becomes your charger. The 3800mAh capacity ensures lights stay on through extended power outages.
-
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
-
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.
-
Cordless Power Tools: Drills, saws, and impact drivers demand 20–40A continuous current, far beyond this battery's 10A protection limit.
-
RC Cars, Drones & High-Drain Models: These require 20–30A+ continuous current. This battery will not function and may trigger protection.
-
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.
