# What is the best external battery for smartphones and tablets? — Verified Specification Comparison

> All specification data verified from official manufacturer documentation.

What is the best external battery for smartphones and tablets?

## Products

### Nitecore Nitecore NB10000 Gen 2
```yaml
product: nitecore-nitecore-nb10000-gen-2
brand: Nitecore
price_gbp: 44.46
origin_country: null
confidence_score: null
summary_source: generated_from_verified_specs_v1
weight: 150g
capacity: 10000mAh 3.85V 38.5Wh
charging_time: Approximately 4 hours
output_current: USB-C 3A at 5V, 2.22A at 9V, 1.68A at 12V; USB-A 3A at 5V, 2A at 9V, 1.5A at 12V
output_voltage: USB-C 5V 9V 12V; USB-A 5V 9V 12V
number_of_ports: 2
input_charging_method: USB-C 5V 2.4A or 9V 2A 18W maximum
```

- **Price:** £44.46 [^1]
- **Summary:** The Nitecore NB10000 Gen 2 is a slim, lightweight 10000mAh power bank with a carbon fiber construction, USB-C 20W output, and USB-A 18W output. It can charge two devices simultaneously and suits travelers, hikers, and everyday users who need dependable backup power without much weight.
- **Ideal For:** It suits smartphones and tablets well because its 10000mAh capacity provides multiple phone charges, USB-C delivers up to 20W, USB-A delivers up to 18W, and two ports support simultaneous charging.
- **Additional Sources:** [^2], [^3]

### Anker Laptop Power Bank 25K 165W Built-In and Retractable Cables
```yaml
product: anker-laptop-power-bank-25k-165w-built-in-and-retractable-cables
brand: Anker
price_gbp: 88.98
origin_country: null
confidence_score: null
summary_source: generated_from_verified_specs_v1
weight: 21.0oz (595g)
capacity: 25,000mAh
charging_time: About 2 hours with a 100W or higher charger
output_current: USB-C: up to 5A; USB-A: up to 3A
output_voltage: USB-C: 3-11V, 5V, 9V, 10V, 12V, 15V, 20V; USB-A: 3-11V, 5V, 9V, 12V
number_of_ports: 4 total: 3 USB-C and 1 USB-A
input_charging_method: USB-C cable or USB-C port, 100W maximum
```

- **Price:** £88.98 [^4]
- **Summary:** This 25,000mAh power bank delivers up to 165W and can charge four devices simultaneously through three USB-C connections and one USB-A port. Its two built-in USB-C cables, retractable cable, smart display, and high laptop-charging capacity make it well suited to frequent travelers, remote workers, and users carrying multiple devices.
- **Ideal For:** It suits smartphones and tablets especially well because its 25,000mAh capacity provides multiple charges, while three 100W-capable USB-C connections, one 33W USB-A port, and support for charging four devices at once provide fast and flexible multi-device charging.

### Epico Portable Power Bank 20000 mAh 100 W
```yaml
product: epico-portable-power-bank-20000-mah-100-w
brand: Epico
price_gbp: 59.99
origin_country: null
confidence_score: null
summary_source: generated_from_verified_specs_v1
weight: 368 g
capacity: 20000 mAh
output_current: 5 A
output_voltage: 20 V
number_of_ports: 4
input_charging_method: USB-C
```

- **Price:** £59.99 [^5]
- **Summary:** This 20000 mAh power bank provides up to 100 W Power Delivery through USB-C ports and includes two USB-A ports with up to 22.5 W output. Its LED display, aluminium casing, and ability to charge up to four devices make it suitable for smartphone, tablet, and laptop users who need portable high-capacity charging.
- **Ideal For:** It suits smartphones and tablets because its 20000 mAh capacity can recharge them several times, while four ports allow simultaneous charging and USB-C Power Delivery provides fast charging up to 100 W.
- **Additional Sources:** [^6]

### VIOFO BP100
```yaml
product: viofo-bp100
brand: VIOFO
price_gbp: 222.43
origin_country: null
confidence_score: null
summary_source: generated_from_verified_specs_v1
weight: 1.22kg
capacity: 7650mAh 98Wh
charging_time: 70 minutes via hardwiring cable or 100 minutes via cigarette lighter cable
output_current: 3A
output_voltage: 11.8V to 14.2V and 5V
number_of_ports: 2
input_charging_method: Cigarette lighter cable or hardwiring cable
```

- **Price:** £222.43 [^7]
- **Summary:** The VIOFO BP100 is a 7650mAh LiFePO4 battery pack designed for extended dash cam parking-mode recording. It provides a dedicated dash cam output and a 5V USB Type-C output for charging smartphones and other mobile devices, making it suitable for drivers, commuters, and rideshare users.
- **Ideal For:** The BP100 suits smartphones and tablets because its dedicated 5V 3A USB Type-C output can charge mobile devices while its 98Wh capacity and 70- or 100-minute vehicle charging options provide substantial stored power.

### Baseus PicoGo AM41 5000 mAh 20 W
```yaml
product: baseus-picogo-am41-5000-mah-20-w
brand: Baseus
price_gbp: 14.53
origin_country: null
confidence_score: null
summary_source: generated_from_verified_specs_v1
weight: 110 g
capacity: 5000 mAh
output_current: 2.4 A, 2.22 A, 1.5 A
output_voltage: 5 V, 9 V, 12 V
number_of_ports: 2
input_charging_method: USB-C
```

- **Price:** £14.53 [^8]
- **Summary:** The Baseus PicoGo AM41 is a slim 5000 mAh magnetic power bank with 20 W USB-C wired output and up to 7.5 W magnetic wireless charging. Its compact 110 g design suits smartphone users who want portable backup power, while the USB-C connection can also charge compatible tablets.
- **Ideal For:** It suits smartphones and tablets because it combines a 5000 mAh capacity with 20 W USB-C output, magnetic wireless charging, pass-through charging, and a USB-C input.
- **Additional Sources:** [^9], [^10]

### INIU INIU P50
```yaml
product: iniu-iniu-p50
brand: INIU
price_gbp: 22.02
origin_country: null
confidence_score: null
summary_source: generated_from_verified_specs_v1
weight: 160 g
capacity: 10000 mAh
charging_time: 2 hours
output_current: 3A maximum
output_voltage: 5V, 9V, 12V, 15V
number_of_ports: 3
input_charging_method: USB-C, 20W maximum
```

- **Price:** £22.02 [^11]
- **Summary:** The INIU P50 is a compact 10000 mAh power bank with up to 45W USB-C output, two USB-C ports, one USB-A port, and a detachable USB-C cable. Its lightweight 160 g design and digital battery display suit people who need portable fast charging for smartphones, tablets, and other devices.
- **Ideal For:** The INIU P50 suits smartphone and tablet users who want a lightweight 160 g battery with 10000 mAh capacity, up to 45W USB-C charging, and three ports for charging multiple devices.

---
## References & Sources
[^1]: MaxBeam Australia, accessed 2026-09-04. https://maxbeamaustralia.com.au/product/nitecore-nb10000-gen2-10000mah-ultra-slim-power-bank-20w-output-carbon-fiber-150g/
[^2]: Ryda, accessed 2026-09-04. https://www.ryda.com.au/nitecore-nb10000-gen-2-quick-charge-power-bank
[^3]: Harmen Hoek, accessed 2026-09-04. https://harmenhoek.com/products/nitecore-nb10000-gen2-portable-charger-10000mah-fast-charging-power-bank-battery-pack-dual-output-for-cell-phone-tag
[^4]: Anker, accessed 2026-09-04. https://www.anker.com/products/a1695-anker-power-bank-25000mah-165w
[^5]: Galaxus, accessed 2026-09-04. https://www.galaxus.be/en/s1/product/epico-portable-power-bank-20000-mah-100-w-74-wh-powerbanks-54163838
[^6]: Multitronic, accessed 2026-09-04. https://www.multitronic.fi/en/products/4389467/epico-aluminium-pd-20000-mah--100w---powerbank--grey
[^7]: CEN UK, accessed 2026-09-04. https://www.cen.uk/products/viofo-bp100-ep100-dash-cam-battery-pack-for-parking-mode-protection-15300mah
[^8]: Baseus, accessed 2026-09-04. https://www.baseus.com/products/picogo-ultra-slim-magnetic-power-bank-5000mah
[^9]: Hurtel, accessed 2026-09-04. https://hurtel.com/en/products/baseus-picogo-am41-5000mah-20w-ultra-thin-magsafe-compatible-power-bank-with-black-baseus-simple-usb-c-60w-30cm-cable-gray-196022
[^10]: Baltrade, accessed 2026-09-04. https://shop.baltrade.eu/en/baseus-picogo-am41-ultrathin-magnetic-qi-magsafe-power-bank-p1007680c813-00-20w-5000-mah-p22558.html
[^11]: Best Buy, accessed 2026-09-04. https://www.bestbuy.com/product/iniu-portable-charger-markets-smallest-10000mah-pd-45w-power-bank-with-layout-usb-c-cable-for-iphone-samsung-pixel-etc-black/CZW8VCWVTF