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Vape Batteries & Chargers

Spare vape batteries and chargers for box mods and advanced kits, including 18650 and 21700 cells, USB-C chargers and multi-bay docks. Getting the right battery size, capacity and charger setup is the difference between a vape that runs well and one that feels flat or unreliable. Have a look at our wider vape accessories range too if you need anything else to go with your kit.
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Choosing the Right Vape Battery

The right battery comes down to three things: size, capacity and current rating. Size is dictated by your mod (18650 or 21700 are the two common ones). Capacity is measured in mAh and tells you how long the cell will last between charges. Current rating, shown in amps, tells you how much power the battery can safely deliver to your coil.

If you run high-wattage vape tanks with sub-ohm coils, you need a battery with a strong continuous discharge rating. Lower-wattage setups are more forgiving and you can prioritise capacity instead. Always check what your mod manufacturer recommends before buying.

18650 vs 21700 Vape Batteries

Both are lithium-ion cells used in regulated and mechanical mods, but the size and performance are different. 18650s are the older standard: smaller, lighter, and still used in plenty of dual-battery mods. 21700s are larger, hold more capacity, and generally deliver more current, which suits high-power single or dual-cell mods.

Feature1865021700
Size (mm)18 x 6521 x 70
Typical capacity2,500 to 3,500 mAh3,750 to 5,000 mAh
Typical current15 to 30A25 to 40A
Best forCompact mods, dual-cell setupsHigh-power single or dual-cell mods
Battery lifeShorter between chargesLonger between charges

USB-C Chargers and Multi-Bay Chargers

You've got two main options. USB-C charging via your mod is convenient: plug the device in, walk away, done. Most modern mods support it and many now charge at faster rates than older micro-USB setups.

External multi-bay chargers are the better option if you carry spare cells or run more than one mod. They charge each battery independently, often with a display showing voltage and capacity, and they tend to be gentler on the cells over time. Two-bay and four-bay chargers are the most common.

Vape Battery Safety Tips

Lithium-ion cells are safe when treated properly and dangerous when they're not. The basics:

  • Never carry loose batteries in a pocket or bag. Use a plastic battery case.
  • Check the wrap regularly. Any tears, nicks or exposed metal mean the battery needs rewrapping or replacing.
  • Don't mix old and new batteries in a dual-cell mod. Use them as a pair, charged together.
  • Keep batteries away from heat, water and direct sunlight.
  • Only buy from reputable sources. Counterfeit cells with inflated ratings are everywhere online.

When to Replace Your Vape Battery

Batteries don't last forever. You'll typically get 300 to 500 full charge cycles before performance drops off. Signs it's time for a new one: shorter time between charges, the mod cutting out at higher wattages, the cell getting warm during use, or any visible damage to the wrap. If you're unsure, replace it. Cells are cheap, accidents aren't.

Matching Batteries and Chargers to Your Vape Kit

Not every kit uses removable batteries. Refillable pod kits and most starter kits have built-in batteries that charge via USB-C, so you don't need to worry about cells or external chargers. Box mods and advanced vape kits are where removable batteries come in, and the mod itself will tell you whether it takes 18650 or 21700 cells, and how many.

Pair your batteries with coils rated for the wattage you actually vape at: have a look through our vape coils range to make sure everything is matched up properly. All vaping products on this site are for adults aged 18 and over.

What batteries do vape mods use? +
Most regulated and mechanical vape mods use 18650 or 21700 lithium-ion cells. Some larger mods take 20700s, and some smaller ones use built-in batteries that aren't removable. Always check your mod's manual before buying.
What is the difference between 18650 and 21700 vape batteries? +
The numbers refer to the physical size of the cell in millimetres. 21700s are larger, hold more capacity (typically 4,000 to 5,000 mAh vs 2,500 to 3,500 for 18650s) and deliver more current. 18650s are still widely used in compact and dual-cell mods.
Can I use any charger for my vape battery? +
No. Use a charger designed for lithium-ion vape cells, ideally one with intelligent charging that detects the battery and adjusts current. Cheap unbranded chargers can overcharge or overheat cells and are a fire risk.
Are multi-bay vape battery chargers better than USB charging? +
They're better if you have spare cells or multiple mods. External chargers charge each cell independently, are gentler on the batteries long-term, and let you keep vaping while a set charges. USB-C in-mod charging is fine for everyday use if you only have one device.
What does mAh mean on a vape battery? +
mAh stands for milliamp-hours and measures how much charge the battery holds. Higher mAh means longer battery life between charges. A 3,000 mAh cell will last longer than a 2,500 mAh cell at the same wattage.
How do I know when to replace a vape battery? +
Replace it when battery life noticeably drops, the mod cuts out at wattages it used to handle, the cell feels warm in use, or the wrap is damaged in any way. Most cells last 300 to 500 full charge cycles.
Is it safe to carry spare vape batteries? +
Yes, as long as you use a plastic battery case. Never carry loose cells in a pocket or bag where they can touch keys, coins or other metal objects. A short circuit can cause the battery to vent or catch fire.
Can I use damaged vape batteries if they still work? +
No. If the wrap is torn, the insulator ring is damaged, or there are any dents or marks on the metal, stop using the cell. Have it rewrapped properly or recycle it and buy a new one. A damaged cell is a serious safety risk.
Should I charge vape batteries inside my mod or in an external charger? +
Either works for modern mods with USB-C charging. External chargers tend to be gentler on cells and are essential if you have spares or run dual-battery setups where the cells need to stay matched.
Do vape batteries need to be used in married pairs? +
In dual-battery mods, yes. Use two identical cells bought at the same time, charged together and used together. Mixing batteries of different ages or charge levels puts uneven strain on each cell and is unsafe.
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