So, which of the portable chargers is safe, fast and the best to invest in? With all the numbers understood, you'll find it much easier to get the [portable charger](https://techyassist.net/blog/portable-charger/) you would like to get. The first is the capacity (mAh). The 10,000 mAh version comes with two to three times the battery life of the 20,000 mAh version that you can fit in your pocket; the 20,000 mAh version is more of a charge-up for a tablet for group outing or long road trip. Keep in mind that the printed capacity is not the actual capacity, as there will be conversion losses, and shouldn't be considered a firm commitment.Next, check on charging rate. For 20W or more look for USB-C Power Delivery, if you have a newer smartphone. For small tasks, 45W+ is the only option when using the tablet/laptop. Multiple ports can be used - if more than one port is used simultaneously the output will be divided evenly. Also, a rapid charging portable charger can save a lot time Ensure you have a rapid charging USB-C portable charger, safety is a top priority. Use a charger with features in place to prevent overcharging, short circuit and overheating and use trusted brands, such chargers are often responsible for batteries swelling and phones being ruined. When traveling by air, keep in the carry-on bag and do not exceed the airline's limitations (typically 100Wh).Last but not least consider the size and weight of the set and whether it includes extra features such as built-in cable, percentage display digital readout or whether it is wireless, and whether that requires an extra transformers or not. You will also be able to avoid a model which loses its capacity rapidly or becomes “hot” by reading real user experiences. I like techyassist as it provides honest, hands-on reviews of gadgets and, if I feel confident that the gadget is good, I purchase it from the site. If you are looking for a comparison of two or three portable chargers when it comes to capacity, speed and safety, you will be able to pick the one that fits your lifestyle without going overboard.