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 |  Anker 26250mAh Power Bank |  Anker 20100mAh Power Bank |  Anker Laptop Power Bank |  Anker 24K Power Bank |  Anker 20K Zolo Power Bank |  Anker Prime 27K PowerBank | |
|---|---|---|---|---|---|---|---|
Customer Reviews | — | — | — | — | — | — | — |
Price | — | — | — | — | — | — | — |
Main Feature | 87W Max Fast Charging | 300W,TurboBoost,AppControl | 220W,TurboBoost,AppControl | Built-in + Retractable Cables | PD 3.1, Max 140W | Built-In C Cable | Anker Prime 27K PowerBank |
Charging 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 | Built-in C Cable + 1C | 2 USB-C + 1 USB-A |
Compatible Devices | iPhone 16/iPhone Serie | MacBook Pro/iPhone 17/and More | MacBook Pro/iPhone 17/and More | iPhone 16/iPhone Serie | iPhone 16/15/14 Series,MacBook | iPhone16/iPhone/MacBook/Galaxy | iPhone 16/iPhones/Laptops |
Recharging Time | ~1.5 Hours | ~1.06 Hours(134W) | ~1.43 Hours(100W) | ~2 Hours(100w) | ~1 Hour (140W) | ~5.25Hours(20W) | ~0.72 Hours (140W) |
capacity | 20000mAh | 26250mAh | 20,100mAh | 25000mAh | 24000 mAh | 20000mAh | 27650 mAh |
Size | 6.2 x 2.89 x 1.02 in | 6.29×1.49×2.47 in | 5.78 x 1.75 x 1.96 in | 6.18 x 1.93 x 2.12 in | 6.13 * 2.15 *1.95 in | 4.72*2.90*1.24 in | 6.37 * 2.24 * 1.96 in |
Weight | 0.97lb | 1.32lb | 1.24lb | 1.31lb | 1.31lb | 0.78lb | 1.47lb |
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 | Anker 26250mAh Power Bank | Anker 20100mAh Power Bank | Anker Laptop Power Bank | Anker 24K Power Bank | Anker 20K Zolo Power Bank | Anker Prime 27K PowerBank |
|---|---|---|---|---|---|---|
| Customer Reviews | ||||||
| — | — | — | — | — | — | — |
| Price | ||||||
| — | — | — | — | — | — | — |
| Main Feature | ||||||
| 87W Max Fast Charging | 300W,TurboBoost,AppControl | 220W,TurboBoost,AppControl | Built-in + Retractable Cables | PD 3.1, Max 140W | Built-In C Cable | Anker Prime 27K PowerBank |
| Charging 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 | Built-in C Cable + 1C | 2 USB-C + 1 USB-A |
| Compatible Devices | ||||||
| iPhone 16/iPhone Serie | MacBook Pro/iPhone 17/and More | MacBook Pro/iPhone 17/and More | iPhone 16/iPhone Serie | iPhone 16/15/14 Series,MacBook | iPhone16/iPhone/MacBook/Galaxy | iPhone 16/iPhones/Laptops |
| Recharging Time | ||||||
| ~1.5 Hours | ~1.06 Hours(134W) | ~1.43 Hours(100W) | ~2 Hours(100w) | ~1 Hour (140W) | ~5.25Hours(20W) | ~0.72 Hours (140W) |
| capacity | ||||||
| 20000mAh | 26250mAh | 20,100mAh | 25000mAh | 24000 mAh | 20000mAh | 27650 mAh |
| Size | ||||||
| 6.2 x 2.89 x 1.02 in | 6.29×1.49×2.47 in | 5.78 x 1.75 x 1.96 in | 6.18 x 1.93 x 2.12 in | 6.13 * 2.15 *1.95 in | 4.72*2.90*1.24 in | 6.37 * 2.24 * 1.96 in |
| Weight | ||||||
| 0.97lb | 1.32lb | 1.24lb | 1.31lb | 1.31lb | 0.78lb | 1.47lb |
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