If you have an OtterSpot wireless charging pack from OtterBox, there’s a warning about which you need to know. Engadget says the company has found that some early units of the device, released in August of 2019, may swell “under multi-stack and higher temperature conditions.” Kind of a bummer that since, the piece says:
One of the key selling points of OtterSpot is that it comprises a base unit and stackable battery packs, which you can use to wirelessly charge devices on the go.
The good news: No injuries reported around the issue to this point. According to Engadget:
The company is contacting customers it knows bought an affected unit, but if you have any OtterSpot battery packs, it's worth checking the serial numbers. If the number starts with 229, 250 or 259, the unit could be affected by this issue and it's worth calling customer service at 1-855-688-7269. OtterBox says it will replace potentially defective batteries at no cost.