21700 Battery
21700 vape batteries for mods that take a removable 21700 cell. We have 2 on this page: the VTC6A 4000mAh and the Samsung INR21700-50E 5000mAh. A 21700 is larger than an 18650 and holds more charge, so it's popular in single-battery mods.
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Which 21700 should I get?
- VTC6A 4000mAh – 20A continuous and 30A maximum discharge. The better pick for most sub-ohm mods running at higher power.
- Samsung 50E 5000mAh – more capacity, but Samsung rates it at 9.8A continuous. It suits lower-power vaping where long battery life matters more than power.
Always check your mod's manual. It should say which cell size it takes and any minimum rating.
Looking after your batteries
Keep loose cells in a proper 21700 battery case, never loose in a pocket or bag. Check the wrap each time you put a battery in your mod, and stop using it if the wrap is torn. Charge loose cells in a proper charger such as the Efest charger.
21700 batteries in stock
21700 cells (2)
Questions we get asked
Can I use a 21700 in an 18650 mod?
No. A 21700 is wider and longer, so it won't fit. If your mod takes 18650s, see 18650 batteries.
What does the "A" rating mean?
It's how much current the cell can safely give out. The continuous rating is the one that matters for vaping.
Where are the other batteries and chargers?
See all vape batteries or batteries and chargers.
Why buy from OB Vape?
OB Vape is an Irish, family-run vape shop in Drogheda, Co. Louth, open seven days a week. We send tracked delivery right across Ireland and do same-day local delivery around Drogheda, or you can collect in the shop. Everything we sell is genuine stock from established brands. We only sell to adults aged 18 and over, and we ID check orders where needed.