To calculate charging time using this formula, you simply divide battery capacity by charging current. 100Ah ÷ 10A = 10 hrs. In this scenario, your estimated charge time is 10 hours. Tip: You can estimate how much battery capacity you need by using the inverse of this formula: amps × hours = amp hours.
Portable Charger 5000mAh for Mobile Phone, Small Power Bank Battery Ultra-Compact & 2-Hours Fast Charge for Samsung, Xiaomi, Huawei, OPPO, etc £12.74 Check price 2.
Assuming you are talking about a 20000mAh power bank, it will last for about 8-10 hours. This is because the average smartphone has a battery capacity of around 3000mAh. So, if you have a 3000mAh phone, then one charge from your power bank will be able to give it a full charge.
Energizer - MAX 10,000mAh 15W USB-C Fast Universal Portable Battery Charger/Power Bank with LCD screen for Smartphones & Accessories - Black User rating, 4.5 out of 5 stars with 1090 reviews. (1,090) The capacity of a power bank is commonly measured in milliampere-hours (mAh). This indicates the amount of charge that the power bank can store. For example, a power bank with a capacity of 5000mAh can theoretically deliver 5000 milliamperes (or 5 amperes) for one hour. To determine the capacity of your smartphone’s power bank, divide its capacity by its phone’s battery capacity. When compared to a standard power bank, a 20,000 mAh iPhone X battery should last three to four hours, whereas an iPhone 8 battery can last three to four hours. A power bank with a higher capacity may be the best option for you. 6bsZ.