For cleaning up the battery acid, a paste made of baking soda and water will neutralize the acid. Rub it on the white residue and then wipe clean with a damp cloth. Make sure the hub is completely dried after cleaning.
Here is the correct info for AA batteries:
Potassium hydroxide is a caustic agent that can irritate the respiratory system, eyes, and skin, you may want to take a precautionary extra step of using vinegar or lemon juice (both acids) to neutralize the alkaline build-up. Use a Q-tip or an old toothbrush and carefully wipe away.
I purchased my SmartThings V2 hub in December (less than 2 months old), and got the recent email about the firmware update and battery issue. I just pulled my batteries out, and sure enough, there was white residue everywhere. I spent the last 30 minutes cleaning the battery compartment using vinegar and alcohol, so I’m not a super happy camper right now.
Mine too. I just emailed support that I wanted a replacement as I still hear something rattling in my hub even after cleaning the battery tray (the gasses may have corroded something else). My hub is a few months old. Obviously a design flaw that warrants a recall. I see this post had been around for a while. Smartthings should have sent an email sooner. Very frustrated.
Wow - my hub (and damage) looks almost identical to yours! I think I plugged mine in at Thanksgiving, so about 2 months for me also. I haven’t even begun to think about the cleanup involved. What a mess.
FWIW, I checked my hub after receiving the ST email and reading through this thread, only to find that I had apparently had the foresight to install rechargeable Energizers during initial set up (just before Christmas). No leaks and no warmer than the surrounding hub. The hub is also on a UPS.
Seems this set up allowed me to dodge a bullet, tho I haven’t tested the batts for voltage. That said, can any of you engineering types speak to potential problems with such a set up? Seems now is as good a time as any to evaluate…
Well, the batteries corroded because the hub was sending a current to them. When your rechargeable batteries receive a current, they charge (assuming it’s the proper voltage). A good charger stops sending a current when the batteries are fully charger, the ST hub didn’t.
So by sending a constant current to your rechargeable batteries after they’re fully charged, you might be damaging them.
Someone else measured it and said it was a constant draw, hence the batteries went flat, developed gas inside and then ruptured. Mine certainly were dead flat after just 2-3 months. Samsung also notified about parasitic draw and that the latest firmware fixed a ‘battery drain’.