I just bought some new device that has AA bateries included, already inserted, and obviously, already leaking.
Clowns.

Is there a reason that you haven’t specified what kind of "device" that is? :]

@Lensflare if we're talking about such 'devices'. I just use these batteries without such 'device': https://allekabels.nl/blok-batterij...

Finished in a second.

@retoor impressive!

Hmm... I thought the practice of pre-inserted batteries has been dead for a long time, now. Good to see there are still uneducated morons that don't know about battery leakage.

/s

/* Side note: Happened to me w/ a DevKit, once. The thing wouldn't power on. Almost gave me a heart attack... Fortunately cleaned the connectors, inserted new batteries, && it was good as new. */