Simplify your charging routine with the Vapcell P1835A, a 3500mAh 18650 battery featuring a built-in USB charging port. No dedicated charger required—simply plug a standard Micro-USB cable directly into the battery and recharge from any USB power source. Built around a premium 3500mAh cell core, it delivers maximum 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 most major flashlight brands. The built-in LED charging indicator lets you know exactly when the battery is ready. For users who value convenience and maximum capacity, the P1835A keeps you powered up wherever a USB port is available.
Key Features
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Built-in Micro-USB Charging Port – Recharge directly from any standard USB power source: wall adapter, power bank, car charger, or laptop. No external 18650 charger needed. The built-in LED glows red while charging and turns green when fully charged.
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3500mAh Maximum Capacity – Powered by a premium high-capacity cell core, providing industry-leading runtime for demanding LED flashlights, headlamps, and smart home devices. Charge less often, use longer.
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Integrated Safety Protection – Built-in circuit guards against overcharge (4.2V), over-discharge (2.5V), short circuit, and overcurrent (5A 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 ready. Power your flashlight and headlamp, or your doorbell and your fan, with matching high-capacity cells.
Parameters
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 3500mAh capacity provides the longest possible runtime, while USB charging allows convenient recharging from any USB source.
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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 enables easy field recharging from a power bank.
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Smart Doorbells & Wireless Security Cameras: Many video doorbells use 18650 cells. The P1835A provides extended runtime, and the USB port allows easy periodic recharging without removing the battery from the mounting bracket.
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Camping Lanterns & Emergency Lights: Any USB power source becomes your charger. The 3500mAh capacity ensures lights stay on through extended power outages.
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Portable Fans & Travel Gadgets: Minimize accessories—no separate charger to carry in your travel kit. One USB 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 5A protection limit is insufficient and will cut off power under load.
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Cordless Power Tools: Drills, saws, and impact drivers demand 20–40A continuous current, far beyond this battery's 5A 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 70.5mm in length due to the USB port and protection circuit. Some ultra-compact flashlights may not close fully. Always verify your device can accommodate the extra length.
FAQ
Q: How do I charge this battery?
A: Simply connect a standard Micro-USB cable to the charging port on the battery and plug the other end into any 5V 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 charging port and protection circuit, this battery is approximately 70.5mm long—about 5–6mm longer than a standard unprotected 18650 (65mm). Some ultra-compact flashlights with very tight battery compartments 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 P1835A can be charged either through its built-in Micro-USB 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 P1835A's protection circuit limits output to approximately 5A. 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.
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 charging feature makes it easy to top up before use after storage.
