The Chemist
New member but long time lurker
I'll have to keep an eye on these batteries just in case. If you have a couple of batteries identify them with a marker so you can be sure if one of them begin to be a problem. If you are unsure about one of them don't leave it in the Hopper for a long period of time if you don't use it and stop using and contact Hopper if you are sure the battery is swelling, no need to risk your safety or ending with a Vape that you can't use anymore because the battery is stuck inside. I keep all the batteries for all my vapes in two fire proof box just to be sure, best way to avoid a disaster and if one of them burns I still have half of my batteries available. Don't put all your eggs in the same basket right?