Ifthe battery is flat and you charge it with a full 7,000mAh power bank, the power bank can charge the iPhone three times with 780mAh (7,000 - 3110*2=780mAh) remaining. Well, this is only partially true. The general rule is that your power bank 's real capacity is around 2/3 of the theoretical capacity. Ourrange of powerbanks varies from Rs.2900 to Rs.20,000 covering well known brands such as Anker, Aspor, Baseus, RavPower, Realme, Samsung and Xiaomi. You can filter by your favourite color, and features such as fast charging output/input to zero in on your ideal powerbank. ShopAmazon for Ayeway Battery Pack USB C Portable Charger PD 20W Fast Charging 26800mAh Power Bank with Type C Output which can be shared with friends or charge 5 devices at the same time.There are 2 input options,USB Micro and USB C input options.The recharging cord comes with the item is USB type C cord,faster recharging when needed Price $32.49. Key Features: Magsafe Power Bank. Magnetic attachment for wireless charging. Simultaneously use wireless and wired charging options. Simultaneously charge 3 devices. Battery Thedaily maximum power bank charge varies by location. For any additional days after the first 24 hours, RedShare charges a small rental fee plus tax based on the location. $1/hr — Users can charge their devices for one hour and use as many power banks as they want. Any amount of time less than an hour is still billed as one hour. 8pBV.

charging a power bank for the first time