FAQ
Q1: Why is my power bank providing fewer charges than expected?
The capacity reduction during charging is due to a 30% to 45% energy loss in the battery cells and conversion circuitry. Therefore, a fully charged Anker Nano Power Bank offers an estimated 5500mAh to 7000mAh to power devices.
Q2: How can I estimate the number of charges for my device?
To estimate charges, use this formula: (Power Bank Capacity × 0.7) ÷ Device Battery Capacity. For example, an iPhone 15 with a 3,877mAh battery can receive about 1.8 charges from a 10000mAh power bank (calculated as (10000mAh × 0.7) ÷ 3,877mAh).
Q3: How can I charge an iPhone 13 Pro Max with this power bank?
To charge iPhones prior to the iPhone 15 series, an additional USB-C to Lightning cable is required.
Q4: Is it normal for the power bank to get slightly warm during use?
Slight heating due to efficiency losses in the conversion circuit is normal. The temperature of this Anker Power Bank meets the temperature limits of the IEC62368 certification standard.
The World's No. 1 Mobile Charging Brand*
200 Million+
200 Million + Global Customers
146 Markets
Available in 146 Markets
14 Years of Innovation
Pioneering in Charging Technology for 14 Years
- *Anker is the world's No. 1 mobile charging brand based on retail sales value for five consecutive years: 2020 to 2024.
- Data source: Euromonitor International (Shanghai) Co., Ltd., measured in terms of retail value sales in 2020 through 2024, based on research completed in June 2025. Mobile charging brands are defined as those with over 75% of retail sales from mobile phone charging products, including chargers, wireless chargers, power banks, and charging cables. These products may also be used with other consumer electronic devices.
*Pay immediately or installments with Affirm. Rates from 0-36% APR. Payment options through Affirm are subject to an eligibility check and are provided by these lending partners: affirm.com/lenders. Options depend on your purchase amount, and a down payment may be required. CA residents: Loans by Affirm Loan Services, LLC are made or arranged pursuant to a California Finance Lenders Law license. For licenses and disclosures, see affirm.com/licenses. For example, a $800 purchase could be split into 12 monthly payments of $72.21 at 15% APR or 4 interest free payments of $200 every 2 weeks.







