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 A1383 Power Bank (PowerCore 20K) offers an estimated 11,000mAh to14000mAh to power devices.
How can I estimate the number of charges for my device?
To estimate charging cycles, use this formula:
(Power Bank Capacity x 0.65) + Device Battery Capacity ˜ Numberof Charges
For instance, charging a 3,500mAh device using a 20,000mAh povver bank would offer approximately 3.8 charges
How long does it take for the power bank to recharge?
It depends on the charger's power and the ambient temperature. The A1383 model, when using a 30W PD charger at 77°F (25°C), takes about 4.5 hours to recharge.
crosstable
 Anker Power Bank 20K 87W |  Anker Power Bank 20K 220W |  Anker Power Bank 26K 300W |  Anker Laptop Power Bank |  Anker Power Bank 24K 140W |  Anker Power Bank 27K 250W |  Anker Power Bank 9.6K 65W | |
|---|---|---|---|---|---|---|---|
Customer Reviews | — | — | — | — | — | — | — |
Price | — | — | — | — | — | — | — |
Main Feature | 87W Max Fast Charging | 220W , TurboBoost , AppControl | 300W , TurboBoost , AppControl | Built-in + Retractable Cables | PD 3.1, Max 140W | 250W , AppControl | 2-in-1 Power Bank and Charger |
Output Ports | Built-In C Cable + 1C1A | 2 USB-C+1 USB-A | 2 USB-C+1 USB-A | Built-in C Cable*2 + 1C1A | 2 USB-C+1 USB-A | 2 USB-C + 1 USB-A | 2 USB-C |
Recharging Time | ~1.5 Hours(87w) | ~1.43 Hours(100W) | ~1.06 Hours(134W) | ~2 Hours(100w) | ~1 Hour(140W) | ~0.72 Hours(140W) | ~1.4 Hours(65W) |
capacity | 20,000 mAh | 20,100mAh | 26,250mAh | 25,000 mAh | 24,000 mAh | 27,650 mAh | 9,600 mAh |
Total Output | 87W | 220W | 300W | 165W | 140W | 250W | 65W |
Single Port Maximum Output | 65W | 140W | 140W | 100W | 140W | 140W | 65W |
Size | 6.2 * 2.89 * 1.02 in | 5.78 * 1.75 * 1.96 in | 6.29 * 1.49 * 2.47 in | 6.18 * 1.93 * 2.12 in | 6.13 * 2.15 *1.95 in | 6.37 * 2.24 * 1.96 in | 4.53 * 1.65 * 1.71 in |
Weight | 440g/16oz/0.97lb | 510g/18oz /1.24lb | 600g/21oz/1.32lb | 595g/21oz/1.31lb | 630g/22oz/1.39lb | 667g/24oz/1.47lb | 303g/11oz/0.67lb |
Compatible Devices | MacBook Pro/iPhone 17/and More | MacBook Pro/iPhone 17/and More | MacBook Pro/iPhone 17/and More | MacBook Pro/iPhone 17/and More | MacBook Pro/iPhone 17/and More | MacBook Pro/iPhone 17/and More | MacBook Pro/iPhone 17/and More |
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 A1383 Power Bank (PowerCore 20K) offers an estimated 11,000mAh to14000mAh to power devices.
How can I estimate the number of charges for my device?
To estimate charging cycles, use this formula:
(Power Bank Capacity x 0.65) + Device Battery Capacity ˜ Numberof Charges
For instance, charging a 3,500mAh device using a 20,000mAh povver bank would offer approximately 3.8 charges
How long does it take for the power bank to recharge?
It depends on the charger's power and the ambient temperature. The A1383 model, when using a 30W PD charger at 77°F (25°C), takes about 4.5 hours to recharge.
crosstable
Anker Power Bank 20K 87W | Anker Power Bank 20K 220W | Anker Power Bank 26K 300W | Anker Laptop Power Bank | Anker Power Bank 24K 140W | Anker Power Bank 27K 250W | Anker Power Bank 9.6K 65W |
|---|---|---|---|---|---|---|
| Customer Reviews | ||||||
| — | — | — | — | — | — | — |
| Price | ||||||
| — | — | — | — | — | — | — |
| Main Feature | ||||||
| 87W Max Fast Charging | 220W , TurboBoost , AppControl | 300W , TurboBoost , AppControl | Built-in + Retractable Cables | PD 3.1, Max 140W | 250W , AppControl | 2-in-1 Power Bank and Charger |
| Output Ports | ||||||
| Built-In C Cable + 1C1A | 2 USB-C+1 USB-A | 2 USB-C+1 USB-A | Built-in C Cable*2 + 1C1A | 2 USB-C+1 USB-A | 2 USB-C + 1 USB-A | 2 USB-C |
| Recharging Time | ||||||
| ~1.5 Hours(87w) | ~1.43 Hours(100W) | ~1.06 Hours(134W) | ~2 Hours(100w) | ~1 Hour(140W) | ~0.72 Hours(140W) | ~1.4 Hours(65W) |
| capacity | ||||||
| 20,000 mAh | 20,100mAh | 26,250mAh | 25,000 mAh | 24,000 mAh | 27,650 mAh | 9,600 mAh |
| Total Output | ||||||
| 87W | 220W | 300W | 165W | 140W | 250W | 65W |
| Single Port Maximum Output | ||||||
| 65W | 140W | 140W | 100W | 140W | 140W | 65W |
| Size | ||||||
| 6.2 * 2.89 * 1.02 in | 5.78 * 1.75 * 1.96 in | 6.29 * 1.49 * 2.47 in | 6.18 * 1.93 * 2.12 in | 6.13 * 2.15 *1.95 in | 6.37 * 2.24 * 1.96 in | 4.53 * 1.65 * 1.71 in |
| Weight | ||||||
| 440g/16oz/0.97lb | 510g/18oz /1.24lb | 600g/21oz/1.32lb | 595g/21oz/1.31lb | 630g/22oz/1.39lb | 667g/24oz/1.47lb | 303g/11oz/0.67lb |
| Compatible Devices | ||||||
| MacBook Pro/iPhone 17/and More | MacBook Pro/iPhone 17/and More | MacBook Pro/iPhone 17/and More | MacBook Pro/iPhone 17/and More | MacBook Pro/iPhone 17/and More | MacBook Pro/iPhone 17/and More | MacBook Pro/iPhone 17/and More |
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