When it comes to vaping, the battery is the heart of every device. It determines how long you can vape, how much power you can deliver to the coil, and ultimately how satisfying the experience will be. Because the market is flooded with a myriad of devices—from tiny, draw‑activated disposable sticks to advanced, rebuild‑ready box mods—understanding exactly what batteries vape users rely on is essential. Below is a thorough, step‑by‑step guide that tackles every angle of the question “What batteries do vapes use?” and equips you with the knowledge to pick the right power source for your style, budget, and safety expectations.
1. The Basics: Why Battery Type Matters
- Power Output (wattage) – The battery’s ability to push voltage to the coil decides the heat generated, which influences vapor production and flavor intensity.
- Capacity (mAh) – Measured in milliampere‑hours, capacity tells you how many puffs you can expect before recharging. Higher mAh = longer sessions.
- Form Factor – Physical size and shape affect device ergonomics, compatibility with mods, and the possibility of swapping batteries.
- Chemistry & Safety – Different chemistries behave uniquely under stress, temperature variations, and misuse. Knowing the chemistry helps prevent short circuits, overheating, or even fires.
2. The Dominant Chemistry: Lithium‑Ion (Li‑Ion)
2.1 What Is Li‑Ion?
Lithium‑ion technology has been the workhorse of modern portable electronics for more than two decades. In vaping, Li‑ion cells dominate because they combine high energy density, relatively low internal resistance, and a flat discharge curve that provides consistent voltage until the cell is nearly empty.
2.2 Sub‑Categories
| Sub‑type | Typical Voltage (Nominal) | Typical Capacity Range | Common Use Cases |
|---|---|---|---|
| Lithium‑Ion Cobalt (LiCoO₂) | 3.6‑3.7 V | 1000‑3500 mAh | Standard pod‑style devices, disposable vapes with built‑in batteries |
| Lithium‑Ion Manganese (LiMn₂O₄) | 3.6‑3.7 V | 1500‑3000 mAh | High‑drain sub‑ohm devices, box mods that demand high current |
| Lithium‑Ion Nickel‑Cobalt‑Manganese (NCM) | 3.6‑3.7 V | 1800‑3500 mAh | Premium mods, devices that combine high capacity with moderate current draw |
| Lithium‑Polymer (Li‑Po) | 3.7‑4.2 V (when fully charged) | 200‑2500 mAh (flexible form) | Slim pod‑mods, integrated‑battery devices, ultra‑thin disposable vapes |
Key take‑away: Almost every rechargeable vape battery you encounter is a Li‑ion variant, with Li‑Po being the most common for sealed, non‑removable designs.
3. Form Factors: From Cylinders to Flat Packs
3.1 Removable Cylindrical Cells
Removable cells are the most versatile because you can swap them out for a fresh pack or carry spares. They come in several standard diameters:
3.1.1 18650 (18 mm × 65 mm)
- Capacity: 1500‑3500 mAh (the “high‑capacity” models can exceed 3500 mAh, but they often sacrifice some discharge capability).
- Maximum Continuous Draw: 15‑30 A for most reputable brands; the “high‑drain” variants can handle 30‑45 A.
- Typical Applications: Mid‑range to high‑end box mods, sub‑ohm tanks, rebuild‑able atomizers (RBAs).
- Why It’s Popular: Balance of size, capacity, and current capability makes it the default for many enthusiasts.
3.1.2 20700 (20 mm × 70 mm)
- Capacity: 2600‑4250 mAh.
- Max Continuous Draw: 30‑45 A (some models up to 50 A).
- Typical Applications: High‑power mods that require more juice without increasing device bulk.
- Pros/Cons: Provides more capacity than 18650 while staying relatively compact; however, it’s less ubiquitous, so spares may be pricier.
3.1.3 21700 (21 mm × 70 mm)
- Capacity: 3000‑5000 mAh.
- Max Continuous Draw: 30‑50 A.
- Typical Applications: “Cloud‑chasing” setups, high‑drain sub‑ohm rigs, and some newer, high‑capacity starter kits.
- Why It’s Gaining Traction: The extra capacity reduces the need for frequent recharging; many manufacturers now ship their high‑performance mods with a pre‑installed 21700.
3.1.4 16340 (16 mm × 34 mm) & 11100 (11 mm × 100 mm)
- Capacity: 350‑1000 mAh (16340) and 300‑1100 mAh (11100).
- Max Continuous Draw: 8‑15 A (16340) and 5‑10 A (11100).
- Typical Applications: Compact, pen‑style devices and low‑drain pods.
- Note: Because of low capacity and current capability, they are rarely seen in high‑drain sub‑ohm mods.
3.2 Integrated (Non‑Removable) Batteries
Modern pod‑mods, disposable vapes, and many “all‑in‑one” devices feature sealed batteries that cannot be removed. These integrated packs are typically:
- Lithium‑Polymer (Li‑Po) pouch cells – thin, flexible, and shaped to fit the device’s silhouette.
- Pre‑charged and sealed – the user simply recharges via USB‑C or micro‑USB, then discards the whole unit when it reaches its end‑of‑life (e‑cigarettes, disposable vapes).
Advantages: Streamlined design, minimal maintenance, leakage‑free.
Disadvantages: Once the battery degrades, the whole device must be replaced; you cannot carry spares for extended sessions.
4. Voltage, Capacity, and Resistance: How They Interact
4.1 Nominal vs. Fully Charged Voltage
- Nominal Voltage: 3.6‑3.7 V for most Li‑ion cells (the average voltage throughout most of the discharge curve).
- Fully Charged Voltage: 4.2 V.
- Cut‑off Voltage: 2.5‑3.0 V (the point where the device should stop drawing to protect the cell).
Understanding these numbers matters because many modern mods let you set a fixed wattage rather than a volts‑per‑ohm ratio. The device will automatically adjust the voltage to hit the targeted wattage based on the coil’s resistance.
4.2 Ohm’s Law Applied to Vaping
- Power (W) = Voltage² / Resistance (Ω)
- For a 0.2 Ω coil at 3.7 V (nominal), you’re looking at roughly 68 W, a figure well beyond the safe operating range of most low‑drain batteries.
Therefore, to run sub‑ohm coils safely, you need a battery capable of high continuous discharge (≥30 A). This is why 18650 or 21700 cells with “high‑drain” ratings are the go‑to for sub‑ohm vaping.
4.3 Capacity vs. Current Draw
- High Capacity (3500‑5000 mAh) – great for long‑lasting sessions, but some high‑capacity cells have higher internal resistance, limiting their safe current draw.
- High‑Drain Cells (e.g., 30‑45 A) – often have slightly lower capacities (1800‑3000 mAh) but can sustain the massive current spikes a sub‑ohm coil demands without voltage sag.
Balancing Act: If you vape at 1 Ω with moderate wattage (10‑20 W), a high‑capacity 3500 mAh 18650 is ideal. If you chase clouds at 0.15 Ω and 100 W, a 30 A‑rated 18650 (e.g., Sony VTC5A, Samsung 30Q) or a 21700 high‑drain cell is required.
5. The Most Common Batteries by Device Category
| Device Type | Typical Battery(s) | Reason for Choice |
|---|---|---|
| Disposable Vapes | Integrated Li‑Po (30‑150 mAh) | Ultra‑compact, sealed, low‑cost. No user‑handled charging required. |
| Pod‑Mod Systems (closed‑system pods) | Integrated Li‑Po (200‑1000 mAh) or removable 18650/20700 | Offers decent capacity while maintaining a sleek profile. |
| Pod‑Mod Systems (open‑system pods) | Removable 18650, 20700, 21700 | Users can swap for higher‑capacity cells to extend pod life. |
| Pen‑Style Starter Kits | 16500‑3700 mAh built‑in Li‑Po or removable 18650 | Small form factor, moderate power for 1.0‑1.2 Ω coils. |
| Box Mods (rebuildable) – Low‑Drip (1.0‑1.5 Ω) | 18650 (1500‑3500 mAh) | Provides enough power for moderate wattage while being inexpensive. |
| Box Mods – Sub‑Ohm (0.1‑0.5 Ω) | High‑drain 18650, 20700, 21700 (30‑45 A) | Must handle high current without voltage sag. |
| Mechanical Mods (no regulation) | High‑drain 18650/20700/21700, verified with a battery tester | Users are responsible for voltage and safety; only the strongest cells should be used. |
6. Safety First: Battery Handling Tips Every Vaper Should Know
- Always Use a Quality Charger – A reliable USB‑C charger that supports CC‑CV (Constant Current‑Constant Voltage) charging protects cells from over‑charging. Cheap “quick‑charge” bricks can push 2 A or more into a 1 A‑rated cell, causing overheating.
- Never Mix Batteries – If you use a dual‑cell (2‑cell) mod, both cells must be the same brand, capacity, and age. Mixing cells introduces imbalance, leading to one cell being over‑stressed.
- Keep Batteries at a Safe Temperature – Store them at room temperature (15‑25 °C). Extreme cold reduces capacity; extreme heat accelerates degradation and can cause venting.
- Monitor Cell Health – Use a dedicated battery tester to check voltage, internal resistance, and capacity every few weeks. A rising resistance indicates the cell is aging.
- Avoid Over‑Discharge – Most vape mods automatically cut off at ~2.5 V, but manually checking the battery after long sessions prevents deep discharge that harms the cell.
- Inspect for Physical Damage – Look for dents, swelling, or corrosion on the terminals. Any deformation means the cell should be discarded immediately.
- Secure Battery Contacts – Loose or dirty contacts can cause intermittent connections, leading to voltage spikes. Clean contacts with a cotton swab and isopropyl alcohol.
- Travel Safely – When carrying spares on a plane, store them in a protective case and keep them in your carry‑on. Do not place them in checked baggage due to fire‑risk regulations.
7. Charging Methods: From Block Chargers to USB‑C Fast Charging
| Charging Type | Typical Output | Pros | Cons |
|---|---|---|---|
| Standard Wall‑Box (1 A‑2 A) | 4.2 V × 1‑2 A | Gentle on batteries, long lifespan | Slower charge times (2‑4 h for 18650). |
| Smart Carry‑Case Chargers | 4.2 V × 1 A (typically) | Portable, built‑in safety circuits | Still relatively slow, limited to one cell at a time. |
| USB‑C PD (Power Delivery) Fast Chargers | Up to 20 V × 1‑3 A (device negotiates 5 V‑9 V) | Can charge a 18650 from 0‑100 % in ~30‑45 min (if the device supports fast charge). | Requires a compatible mod or charging box; cheap PD adapters may not have proper CC‑CV control. |
| External Battery Management Systems (BMS) | Adjustable based on cell chemistry | Enables balancing for multi‑cell packs, protects against over‑charge, over‑discharge, short‑circuit. | More expensive; usually built into high‑end box mods. |
Best Practice: If you own a high‑drain 18650 or 21700, opt for a smart charger with a CC‑CV algorithm and a balance function (even for single cells) to keep the voltage curve smooth and to extend lifespan.
8. Understanding Battery Ratings and How to Interpret Them
8.1 Capacity (mAh)
- What it tells you: Approximate energy stored.
- Real‑world implication: A 2500 mAh 18650 powering a 10 W setup (≈2.7 V nominal) will last roughly (2500 mAh × 3.7 V) / 10 W ≈ 0.925 h (≈55 minutes) of continuous vaping.
8.2 Continuous Discharge Rating (CDR)
- Definition: Maximum current a cell can deliver continuously without overheating. Expressed in amps (A).
- Why it matters: A 20 A CDR cell is safe for a 0.5 Ω coil at 30 W (≈4 A draw). For a 0.15 Ω coil at 100 W (≈21 A draw), you need at least a 30 A‑rated cell.
8.3 Pulse Discharge Rating (PDR)
- Definition: The short‑duration peak current a cell can handle for a few seconds, typical for coil spikes when power is suddenly increased.
- Example: A cell rated 35 A continuous may have a 50 A pulse rating, allowing it to survive the initial surge when you crank the wattage up.
8.4 Internal Resistance (IR)
- Measured in milliohms (mΩ). Lower IR means the cell can maintain voltage under load, essential for consistent wattage.
- Rule of thumb: For sub‑ohm vaping, aim for IR ≤ 20 mΩ. Higher resistance leads to voltage sag and fluctuating wattage.
9. Choosing the Right Battery for Your Vaping Style
9.1 Cloud‑Chasers (High‑Power Sub‑Ohm)
- Typical Setup: 0.1‑0.2 Ω coil, 80‑150 W.
- Best Battery: 20700 or 21700 high‑drain cells such as Samsung 40T, Sony VTC5A, Molicel P42A.
- Why: They provide 40‑45 A continuous draw with low IR and enough capacity (3000‑5000 mAh) to sustain long sessions.
9.2 Moderate Vapers (Mouth‑To‑Lung, 1.0‑1.2 Ω, 10‑25 W)
- Typical Setup: 1.0 Ω at 12 W, or 1.2 Ω at 15 W.
- Best Battery: Standard 18650 with 3000‑3500 mAh capacity and 15‑30 A rating (e.g., Samsung 30Q, LG M50).
- Why: These cells deliver stable power, have long lifespan, and are more affordable.
9.3 Beginners & Pod‑Mod Users
- Typical Setup: Closed pods (0.5‑1.0 Ω), 5‑15 W.
- Best Battery: Integrated Li‑Po, or a removable 18650/20700 with moderate capacity (2500‑3000 mAh).
- Why: Pod‑mods prioritize convenience over raw power; a modest battery meets the demand while keeping the device thin.
9.4 Disposable Vapers
- Battery Type: Tiny Li‑Po pouch cells (30‑150 mAh).
- Why: The device is meant for a single‑use experience; the small battery is enough for 300‑500 puffs before the device is discarded.
10. Frequently Asked Questions (FAQ)
Q1 – Can I use a 21700 battery in a device that originally came with a 18650?
A: Only if the device’s battery compartment is designed to accommodate the larger diameter. Physically swapping a 21700 into a 18650 slot can damage the contacts and compromise safety. Many modern box mods have interchangeable rails that accept both sizes, but always verify with the manufacturer’s specifications.
Q2 – Is a higher mAh always better?
A: Not necessarily. A high‑capacity cell may have higher internal resistance, limiting its ability to supply high current. For sub‑ohm vaping, a slightly lower capacity but higher CDR cell is safer and more reliable.
Q3 – What’s the difference between “protected” and “unprotected” batteries?
A: Protected cells contain an internal circuit that prevents over‑charge, over‑discharge, and short circuits. Unprotected cells lack this safeguard, so the device must provide protection. Most consumer vape devices come with built‑in protection, but when building a mechanical mod (no circuitry), use only protected cells to avoid catastrophic failure.
Q4 – Can I fast‑charge my 18650 with a USB‑C PD charger?
A: Only if the charging module inside your mod or external charger supports Power Delivery and can negotiate the correct voltage (usually 5 V or 9 V) with a proper CC‑CV profile. Using a generic PD charger without a regulating circuit can push dangerous currents into the cell.
Q5 – Do disposable vapes contain recyclable batteries?
A: They contain tiny Li‑Po cells that are technically recyclable, but many municipalities do not accept them in regular recycling streams. Check local e‑waste guidelines; many vape retailers offer take‑back programs.
Q6 – How long does a typical 18650 last before it needs replacement?
A: With proper care, a high‑quality 18650 can survive 300‑500 full charge cycles (each cycle being 0‑100 % discharge). For a daily vaper doing 3‑4 charging cycles per week, this translates to roughly 2‑3 years of reliable service.
Q7 – Is it safe to charge my battery while it’s inside the device?
A: Yes, as long as the device’s charging circuitry is USB‑C or micro‑USB and follows the correct CC‑CV algorithm. Built‑in chargers are designed to stop charging at 4.2 V per cell, preventing over‑charge. Using a wall charger with a cable directly attached to the battery terminals is never safe.
Q8 – What’s the best way to store spare batteries?
A: Store them at around 40‑60 % state‑of‑charge (roughly 3.8 V) in a cool, dry place. This reduces stress on the cells and prolongs shelf life. Avoid keeping them fully charged for long periods, as that accelerates capacity loss.
Q9 – Can I use a phone charger to charge my vape batteries?
A: Only if the charger is designed for vaping batteries (i.e., it provides a constant current up to 2 A and constant voltage cutoff). Generic phone chargers are “smart” but often lack the precise CC‑CV control needed for Li‑ion safety.
Q10 – Why does my device pedal (reduce wattage) when the battery voltage drops?
A: Many mods have a “low‑voltage protection” feature that reduces power output to protect the battery from deep discharge. This is a normal safety function. If you see frequent pedaling, consider a higher‑capacity cell or charge more often.
11. Practical Guide: How to Replace a Battery in a Removable‑Cell Mod
- Turn Off the Device – Ensure the mod is completely powered down. Most devices have a safety lock; press the fire button five times quickly to lock it.
- Open the Battery Compartment – Slide or unscrew the back plate. Some models have a magnetic latch; gently pull it apart.
- Remove the Old Cell – Grip the battery by its edge, avoiding contact with the positive (+) and negative (–) terminals.
- Inspect the Contacts – Look for any residue. If dirty, clean with a dry microfiber cloth; use a tiny amount of isopropyl alcohol for stubborn grime, then let dry fully.
- Insert New Battery – Align the positive (+) tip of the cell with the corresponding contact in the device. Push gently until it clicks into place.
- Close the Compartment – Re‑secure the back plate or latch.
- Run a Quick Check – Power on the device; if the battery indicator shows full, you’re ready to vape. If the mod shows a low‑battery warning, double‑check polarity and ensure the cell is properly seated.
Tip: Keep a small battery protector (a thin plastic sleeve) for each spare cell to avoid scratches and accidental shorting while transporting them.
12. The Role of Battery Brands: Should You Trust the Name?
Not all cells are created equal, even within the same brand. Here’s a quick snapshot of the most reputable manufacturers and why they’re favored by vapers:
| Brand | Notable Series | Typical CDR | Typical Capacity | Why Vapers Choose Them |
|---|---|---|---|---|
| Samsung | 30Q, 25R, 40T, 45E | 15‑40 A | 2500‑4500 mAh | Consistent performance, low IR, widely available. |
| Sony | VTC5A, VTC6, VTC7 | 15‑30 A (VTC5A up to 35 A) | 2600‑3000 mAh | High‑drain capability, trusted for sub‑ohm builds. |
| LG | HG2, MJ1, M50 | 10‑30 A | 2500‑4500 mAh | Smooth discharge curve, excellent longevity. |
| Molicel | P42A, P26A | 35‑45 A | 2600‑3400 mAh | Low IR, popular among cloud‑chasers. |
| Efest | 18650, 20700 (various) | 20‑40 A | 3000‑4250 mAh | Budget‑friendly, OEM‑quality for enthusiasts. |
| Nitecore | 18650, 20700 | 25‑30 A | 3000‑4250 mAh | Robust build, high safety standards. |
Bottom line: Stick to well‑known OEM brands and avoid cheap, unbranded cells sold on shady marketplaces. They may look identical, but internal chemistry and safety circuits can vary dramatically.
13. Real‑World Example: Building a Sub‑Ohm Tank with the Right Battery
Imagine you want a 0.15 Ω rebuildable dripping atomizer (RDA) that you plan to run at 120 W for massive vapor production. Let’s walk through the battery selection process step‑by‑step.
-
Calculate Required Current
[
I = frac{P}{V} = frac{120 W}{3.7 V} ≈ 32.4 A
]
(Using nominal voltage; during discharge it will range from 4.2 V down to ~3.0 V, so the actual current can climb to ~38 A during the initial phase.) -
Select a Battery with ≥ 35 A CDR
- Samsung 40T (40 A CDR, 3800 mAh)
- Molicel P42A (45 A CDR, 3400 mAh)
-
Check Internal Resistance
- Samsung 40T: ~7 mΩ
- Molicel P42A: ~5 mΩ
Lower resistance means less voltage sag, ensuring the device stays close to 120 W throughout the puff.
-
Consider Capacity vs. Weight
- 40T offers more juice, extending session length (~1 hour at 120 W).
- P42A is slightly lighter, beneficial for handheld ergonomics.
-
Safety Confirmation
- Both cells are protected with built‑in over‑charge/discharge circuitry, making them suitable for regulated box mods that also have short‑circuit protection.
-
Charging Plan
Use a smart charger capable of delivering 2 A to 4 A to keep charge time under 2 hours while maintaining health.
By following this logical approach, you guarantee that your high‑power setup will run smoothly, safely, and efficiently.
14. Integrating the Knowledge with IGET & ALIBARBAR Products
14.1 IGET Bar Plus – A Marathon‑Ready Disposable
- Battery: Integrated Li‑Po pouch, approx. 150 mAh.
- Why It Works: For a disposable delivering up to 6000 puffs, the battery is calibrated to provide a steady 3.7 V throughout most of its life, balancing capacity with a slim form factor.
- User Tip: Even though it’s disposable, you can still prolong its lifespan by avoiding high‑temperature storage and using it within the manufacturer’s recommended temperature range (15‑30 °C).
14.2 ALIBARBAR Pod‑Mod Series – Removable 18650/20700 Options
- Device Example: ALIBARBAR Mini‑Pod (supports both 18650 and 20700).
- Battery Recommendation:
- Casual Vaper: 18650 Samsung 30Q (15 A CDR, 3000 mAh) for up to 15 W.
- Power Vaper: 20700 Molicel P26A (30 A CDR, 2600 mAh) for sub‑ohm sessions up to 45 W.
- Why Choose Removable: The ability to swap cells means you can upgrade as your vaping style evolves, without purchasing a new device.
14.3 Purchasing from IGET & ALIBARBAR’s Australian Store
- Fast Delivery: With distribution centers in Sydney, Melbourne, Brisbane, and Perth, you can obtain genuine OEM batteries quickly, reducing the temptation to buy counterfeit cells online.
- Warranty & Support: Purchasing directly from the flagship store ensures you get manufacturer‑verified batteries, backed by ISO‑certified quality control, which translates into higher safety margins for your vape.
15. Environmental Considerations: Proper Disposal and Recycling
Vape batteries, like any lithium‑ion cell, contain hazardous materials. Mis‑handling can lead to soil contamination and fire risks. Here’s a concise plan:
- Collect used batteries in a non‑conductive container (e.g., a plastic box) with the terminals taped or a battery‑safe bag.
- Locate a Recycling Facility – In Australia, many local councils offer e‑waste drop‑off points; some vape retailers partner with EarthCycle for free battery recycling.
- Do Not Toss in General Trash – Even a small puncture can cause a fire in a landfill environment.
- Educate Others – Share proper disposal guidelines with fellow vapers to promote community safety.
16. Recap: The Bottom Line on Vape Batteries
- All vaping devices rely on lithium‑ion technology, either as removable cylindrical cells (18650, 20700, 21700) or sealed Li‑Po packs in pod‑mods and disposables.
- Battery selection hinges on three key parameters: Capacity (mAh), Continuous Discharge Rating (A), and Internal Resistance (mΩ).
- Safety cannot be overstated – use protected cells, charge with smart chargers, store at moderate temperatures, and never mix cells.
- Match the battery to your vaping style: High‑drain, low‑ohm builds need high‑current cells; mouth‑to‑lung setups benefit from high‑capacity, moderate‑drain cells.
- Trusted brands (Samsung, Sony, LG, Molicel, Nitecore) provide consistent performance and safety.
- Disposable vapes embed tiny Li‑Po cells designed for convenience; they are not meant for re‑charging or prolonged use.
- Purchasing from reputable retailers, such as the IGET & ALIBARBAR Australian store, guarantees authentic batteries and access to support should any issues arise.
By internalizing these principles, you’ll enjoy a smoother, longer‑lasting vaping experience while keeping your equipment—and yourself—out of harm’s way.