How long do vape batteries last, per charge and in years?

When people ask how long a vape battery lasts, they usually mean one of two things. The first is per charge: will this get me through the day? The second is lifespan: how many months until it holds noticeably less than it did new?

Per-charge life is mostly down to capacity, measured in mAh, and how much power you use. A 500mAh pod kit at low wattage and a 4400mAh mod at 80W can both last a day for different people.

Lifespan is down to chemistry and habits. Every lithium-ion cell slowly loses capacity with use and age, and some habits speed that up dramatically.

More mAh means more vaping between charges at the same settings. Small pod kits sit around 500 to 1000mAh, larger pod kits 1500 to 2000mAh, and mods with built-in batteries go well beyond that.

Power use matters as much as capacity. A pod kit firing at around 10 to 15W sips energy. A sub-ohm mod at 70W drinks it several times faster, which is why a mod with four times the capacity does not necessarily last four times longer in practice.

If battery life is your priority, look at kits like the Aspire Zelos 3 at 3200mAh, or the Voopoo Drag 6 with a 4400mAh built-in battery.

One charge cycle is using and recharging 100% of a battery's capacity. It does not have to happen in one go: two top-ups from 50% to full count as one cycle between them.

Lithium-ion cells typically manage somewhere between 300 and 500 full cycles before their capacity drops to around 80% of new. Some cells and some gentle habits do better, while heat and abuse do much worse. The decline is gradual, so you rarely notice it day to day. You just realise one week that the battery used to last until bedtime and now gives up at teatime.

For a heavy user charging a removable cell once a day, that puts noticeable fade at somewhere around a year.

Heat is the biggest single enemy of lithium cells. A vape left on a sunny dashboard or a hot windowsill ages faster even when nobody is using it. Running a battery completely flat and leaving it that way is the next worst habit.

Working a cell close to its amp limit also shortens its life, because it runs hotter. So does always charging at the fastest possible rate. None of this means you need to baby your kit, just avoid the extremes.

Here is the side-by-side. Every habit on the right is free, and most of them are easier than the ones on the left. Our guide to storing vape batteries covers the heat side in detail.

A battery does not have to be completely dead to be finished. If your removable cells now drain by midday when they used to last the day, fresh 18650 cells will feel like a new mod.

Some signs are about safety rather than convenience. A cell that gets hot on the charger, swells, leaks or has a damaged wrap should come out of service now, not when it finally fades. For damaged wraps on otherwise healthy cells, see our guide on when to rewrap a battery.

Tap the symptom you are seeing.

Small changes add up. Dropping 10W on a sub-ohm setup can noticeably extend a charge, and many people find the flavour barely changes. Keeping a pod kit's screen brightness low, where it has one, helps a little too.

For removable cells, a second set in a case doubles your day without stressing either set. Rotating sets also shares the cycles between them, so neither wears out early. And if the battery in a sealed pod kit has faded after a long life, it is time to replace the device and recycle the old one properly rather than leaving it in a drawer.

Topping up whenever it is convenient is absolutely fine. Lithium-ion has no memory effect, so you never need to run it flat first.