Why does my power bank provide fewer charging cycles than expected?
During the charging process, there is a 30% to 45% capacity loss due to the battery cell and conversion circuit. A fully charged A1257 can deliver about 5500 to 7000 mAh of power to your devices.
How can I estimate the number of times a device can be charged?
Use the formula: (Total capacity of the power bank's battery × 0.65) /Device battery capacity is approximately equal to Number of charges.
For instance, for a device with a 3000 mAh battery, the calculation would be: (10000 mAh power bank × 0.65) / 3000 mAh is approximately equal to 2.16 charges.
How long does it take for the power bank to recharge?
It depends on the charger's power and the ambient temperature. The A1257 model, when using an 18W PD charger at 25°C, takes about 3.5 hours to recharge.
Does the power bank support simultaneous charging and discharging?
No, it does not support simultaneous charging and discharging.
| Product Dimensions | 4.48 x 2.78 x 0.65 inches |
|---|---|
| Item Weight | 8.8 ounces |
| Item model number | A1257 |
| Batteries | 1 Lithium Polymer batteries required. |
| Special features | Fast Charging, Built In Cable |
| Other display features | Wireless |