the top portable chargers selected by Consumer Reports range from 5,000 mAh to 30,000 mAh. Devices such as smartphones, tablets, and laptops come with their own batteries, and if you examine their specifications, the battery capacity is indicated in mAh. For example, the Samsung Galaxy S26 is equipped with a 4,300 mAh battery, whereas the Google Pixel 10 features a 4,970 mAh battery.
A 5,000 mAh battery pack would recharge both devices at least once. A 10,000 mAh battery pack could recharge them two times, a 20,000 mAh portable charger would allow for approximately four charges, and so forth. When you’re looking for portable power packs, you can evaluate the energy they provide per charge, which helps you determine how many times you can recharge your phone or other gadgets. Keep in mind, laptops typically have significantly larger batteries, around 5,000 to 10,000 mAh, so most smaller packs may not be sufficient for a full charge.