Safe storage temperatures range from 32℉ (0℃) to 104℉ (40℃). Meanwhile, safe charging temperatures are similar but slightly different, ranging from 32℉ (0℃) to 113℉ (45℃). While those are safe ambient air temperatures, the internal temperature of a lithium-ion battery is safe at ranges from -4℉ (-20℃) to 140℉ (60℃).
For standard charging, most Kindle versions can go from a dead battery to completely full in five hours or less. With a fast charger, fast wireless charger, or any other charger that speeds up the process, a dead Kindle can be charged in as little as 2.5 hours. It depends on the version of Kindle and charger.
Using your phone while charging should not damage the battery or any other part of the phone, even if that use involves high-end gaming. The charging system is very smart and will route power appropriately to make the phone work and protect the battery. That said, there is an increased risk of heat, and that matters.
In the vast majority of cases, constantly charging your laptop does not harm the battery. In fact, more often than not, this practice actually extends the battery’s lifespan for the laptop, and it can help boost laptop performance. The only major concern is heat buildup, so make sure your laptop has good airflow.
Usually, frequently charging your laptop will not damage the battery or cause any major problems that you need to know about. Frequent charging does have a set of pros and cons, but when it comes to the battery, frequent charging often extends the battery’s lifespan. For the most part, you can charge whenever you want.
For the most part, frequent charging is not an issue for modern phones with lithium-based batteries. Charging behavior does impact your battery’s lifespan, but the exact ways depend on how you use the phone and what kind of battery you have. You can research best practices for your specific battery.