I purchased the Wasabi twin-pack with charger for my T3i in April 2015, and have been using them without issue. I've used both the Canon charger and the Wasabi charger, never had a problem.
I was going to go for some night shots tonight. I'd had a Wasabi in the camera yesterday, and it had just gone 1/2 green to red, so I knew I needed to charge it. I put it on the charger this afternoon, and later inserted it into the camera. It didn't feel quite right going in, so I pulled the tab to release it, but it did NOT pop up. I thought maybe I had put it in backwards. Removed it with a little careful prying, but it was in correctly. I tried the other Wasabi and it inserted and removed just fine. I noticed that the first Wasabi felt a little thicker in the middle, and it "rocks" when placed on a hard flat surface.
Anyone had their Wasabi batteries bloat like that ? I'm guessing that battery is trash now. Are the Wasabis still trustworthy 3rd party batteries, or do I take the hit for a Canon ?