Ata hoche ambranch ar power bank .ata hoche 10000mah power atar dara 2000 mah mobile 5ta
Charge kora hobe .atar font picture
For instansce the power of a 10000 mAh power bank .the bigger battery is the less cycles you will need to charge.
To the asume that the real world capacity of your power bank .
Power bank ar back side photo
So thank you for all steemit friend