Product profile
Anker 335 Power Bank 20000mAh
Brand: Anker
Included for buyers who can justify extra spend to reduce compromises against the core constraint in this title.
Published: 31/03/2026 · Substantive review: 31/03/2026
Merchant check: 31/03/2026 · Spec check: 31/03/2026 · Last significant change: 18/04/2026
Dates reflect recorded editorial review cycles, not continuous live monitoring.
Category context:
Best for / Not for you
Best for
- General-use all-round power bank buyers
Not for you if
- Ultra-light carry-first buyers
Verified specs
| Spec | Value |
|---|---|
| Capacity | 20000mAh |
| Max output | 20W |
Current route appearances
- Best Airline-Safe Power Banks for Travel UK (2026) · Best premium · Pick 3
- Best Budget Power Banks in the UK (2026) · Best specialist or alternative · Pick 4
- Best Compact Power Banks in the UK (2026) · Best specialist or alternative · Pick 4
- Best High-Capacity Power Banks in the UK (2026) · Best overall · Pick 2
- Best Lightweight Power Banks in the UK (2026) · Best specialist or alternative · Pick 4
- Best Power Banks for Laptops in the UK (2026) · Best overall · Pick 2
- Best Power Banks in the UK (2026) · Best overall · Pick 2
- Best Slim Power Banks for Everyday Carry UK (2026) · Best premium · Pick 3
- Best Travel Power Banks in the UK (2026) · Best overall · Pick 2
- Best USB-C PD Power Banks Under £80 UK (2026) · Best premium · Pick 3
- Best Pass Through Charging Power Banks in the UK (2026) · Best overall · Pick 2
- Best Power Banks for Cold Weather Travel in the UK (2026) · Best overall · Pick 2
- Best Power Banks for Festival Weekends in the UK (2026) · Best overall · Pick 2
- Best Power Banks for Tablets in the UK (2026) · Best overall · Pick 2
- Best Power Banks for Work Travel in the UK (2026) · Best overall · Pick 2
- Best Power Banks under 30 in the UK (2026) · Best overall · Pick 2
- Best Power Banks under 50 in the UK (2026) · Best overall · Pick 2
- Best Power Banks with Built in Cables in the UK (2026) · Best overall · Pick 2
- Best Slim 10000mAh Power Banks in the UK (2026) · Best overall · Pick 2
Award roles across routes: Best premium, Best specialist or alternative, Best overall
Cluster routes to compare next
Use these linked routes to move between flagship and specialist angles before final checkout.
Pros and cons from route evidence
Pros
- Reliable high-capacity everyday backup
- Trusted mainstream accessory ecosystem
Cons
- Heavier than compact 10000mAh units
Current merchant links
Priority next action
Check on AmazonNeed shortlist context first? Best Power Banks in the UK (2026)