Hi CRISTY1, welcome to ECF.
If you need an alternative source, other EU trusted vendors are:
www.ecoluxshopdirect.co.uk
www.akkuteile.de
I'd strongly discourage you from ordering from aliexpress, in case you're considering it. eBay and Amazon should also be avoided for batteries. There are a lot of problems with counterfeit batteries, and they're common on those sites.
I know Mooch's blog can be a bit overwhelming at first, but the parts about battery safety are well worth the read. Another particularly useful bit of the blog is his chart of recommended batteries:
https://www.e-cigarette-forum.com/attachments/7fdf0dbf-4d99-4676-932d-b3259735ef7d-jpeg.735233/
The chart shows the CDR of various batteries (the amp rating, so the number like 20A below the battery). If you're staying at 30 w or below, any 18650 with a CDR of 15 or higher will be fine. There's no problem using the batteries at low power - it's just high power you need to watch out for.
Since 15 A batteries will meet your needs, I'd recommend one of the 3000 mAh batteries:
- Sony VTC6
- Samsung 30Q
- LG HG2
The Samsung 25R has a slightly lower capacity, but it's a great battery that would also work well for you.
If you're new to replaceable batteries, there are three things you should consider ordering along with your batteries:
- Battery case - This has already been mentioned, but it's worth saying again. Never carry a lithium battery loose in your pocket or purse. It should be in a case at all times unless it's in a mod or being charged.
- A charger - It's generally recommended to use an external charger, and getting the right charger is very important as a poor quality one can damage your batteries. Xtar and Nitecore make basic but reliable chargers.
- Battery wraps - The wrap is the plastic sleeve that goes around the battery. Never use a battery with a damaged wrap. Wraps aren't that sturdy, so it's a good idea to have a few on hand. They're very cheap and easy to replace - you pull the old one off, slide the battery into the new one and shrink it on with a hairdryer or heat gun. There are a lot of helpful YouTube videos showing the process.
Good luck! I hope you find what you need.