Leaving your power bank in direct sunlight, in a hot car, or under a pillow while charging (which traps heat) is far more damaging than simply leaving it plugged in overnight. Always charge it in a cool, well-ventilated area. Quality Matters: This cannot be stressed enough. Safety Risks – Is it safe to leave a power bank charging while I sleep? Tales of overheating devices, swollen batteries, or even fires have made users understandably cautious. The mental image of a smoldering power bank on a nightstand is enough to make anyone second-guess their charging habits. However, with the recent trends in smartphones and technological devices causing safety concerns, it is only right to make sure your power pack safety. In this blog post, I will be sharing. Yes, power banks are generally safe for devices. But, there are factors to consider. Are they really safe for your gadgets? This question is important for. While I will probably never own another powerbank charger in my life—waking up to your bed on fire is traumatic, let me tell you—experts argue that there are safe ways to use a powerbank as long as it's treated with respect.