Is it OK that the power bank makes a little sound when I charge it (i.e., the power bank itself)? - Quora
![Amazon.com: NOCO Boost Plus GB40 1000 Amp 12-Volt UltraSafe Lithium Jump Starter Box, Car Battery Booster Pack, Portable Power Bank Charger, and Jumper Cables for up to 6-Liter Gasoline and 3-Liter Diesel Amazon.com: NOCO Boost Plus GB40 1000 Amp 12-Volt UltraSafe Lithium Jump Starter Box, Car Battery Booster Pack, Portable Power Bank Charger, and Jumper Cables for up to 6-Liter Gasoline and 3-Liter Diesel](https://m.media-amazon.com/images/I/71hJgp07X1L.jpg)
Amazon.com: NOCO Boost Plus GB40 1000 Amp 12-Volt UltraSafe Lithium Jump Starter Box, Car Battery Booster Pack, Portable Power Bank Charger, and Jumper Cables for up to 6-Liter Gasoline and 3-Liter Diesel
![Amazon.com: Anker Portable Charger, PowerHouse 100 97.2Wh with 100W AC Outlet/45W USB-C Power Delivery Port, Power Bank for iPhone, Samsung Galaxy, iPad, MacBook, and More : Cell Phones & Accessories Amazon.com: Anker Portable Charger, PowerHouse 100 97.2Wh with 100W AC Outlet/45W USB-C Power Delivery Port, Power Bank for iPhone, Samsung Galaxy, iPad, MacBook, and More : Cell Phones & Accessories](https://m.media-amazon.com/images/I/51pjjOSNEJL.jpg)