Best Budget Portable Chargers 2026: Top Power Banks for Every Pocket
Quick Summary
- Best Overall: Anker PowerCore Slim 10000 — outstanding capacity, slim design, and reliable fast charging at a mid-range price
- Best Budget: INIU 10000mAh Power Bank — exceptional value under £15 with surprisingly fast 22.5W output
- Best Premium: Anker 737 Power Bank (PowerCore 26K) — top-tier 65W charging, massive capacity, and a built-in digital display
Whether you are commuting across London, backpacking through the Scottish Highlands, or simply tired of hunting for a wall socket at the airport, a reliable portable charger is one of the most practical gadgets you can own in 2026. The good news is that you no longer need to spend a fortune to get a dependable power bank. The market is flooded with affordable options that deliver fast charging speeds, generous capacities, and compact designs. In this guide we have tested and reviewed the very best budget portable chargers available in the UK right now, covering every price point from under £15 to around £80, so you can find the perfect match for your needs and your wallet.
What to Look For in a Budget Portable Charger
- Battery capacity (mAh): Capacity is measured in milliamp hours. A 10,000mAh bank will fully charge most modern smartphones roughly twice. If you need to power a tablet or multiple devices, look for 20,000mAh or above.
- Charging speed (watts): The higher the wattage, the faster your device charges. Look for at least 18W for fast-charge compatibility with modern Android phones and iPhones. Budget picks now regularly offer 22.5W or more.
- Number and type of ports: USB-C ports are now standard and essential for charging modern laptops and phones. A USB-C Power Delivery (PD) port paired with a standard USB-A port gives you the most flexibility on a budget.
- Size and weight: A 10,000mAh bank should weigh under 220g to be truly pocket-friendly. Anything heavier is better suited to a bag. Always check dimensions if you plan to carry it in a jacket pocket.
Comparison at a Glance
| Product | Price | Best For | Rating |
|---|---|---|---|
| Anker PowerCore Slim 10000 | £28 | Everyday commuters | ★★★★★ |
| INIU 10000mAh Power Bank | £14 | Tight budgets, students | ★★★★☆ |
| Anker 737 Power Bank (PowerCore 26K) | £80 | Laptops, heavy users | ★★★★☆ |
Our Top Picks
Anker PowerCore Slim 10000
The Anker PowerCore Slim 10000 has long been a staple recommendation, and in 2026 it remains the gold standard for budget-conscious buyers who refuse to compromise on quality. At roughly 9.9mm thick, it slips effortlessly into a jacket pocket, yet it packs a genuine 10,000mAh cell that delivers two full charges for most smartphones. The 12W PowerIQ output intelligently adjusts to the optimal charging speed for your device, and the USB-C input means topping it up overnight is a breeze. Anker’s build quality is noticeably superior to cheaper rivals — the casing feels solid, the LED indicators are crisp, and it has passed over 300 safety checks. It is the portable charger we would hand to a friend without hesitation.
Pros
- Genuinely slim and pocket-friendly at under 10mm
- Excellent Anker build quality and safety credentials
- USB-C input and output included
Cons
- No Power Delivery fast charging on the USB-C output
- Only one output port at a time charges at full speed
INIU 10000mAh Power Bank (BI-B3)
If your priority is spending as little as possible without ending up with a dud, the INIU BI-B3 is a genuine revelation. For well under £15, you get a 10,000mAh power bank capable of 22.5W fast charging — a spec that embarrasses many chargers costing twice the price. It features a USB-C port plus two USB-A ports, allowing you to charge three devices simultaneously, and the built-in LED torch is a handy bonus for camping or festival use. The textured TPU casing feels surprisingly premium, and INIU includes multiple safety protections including over-charge, short circuit, and temperature control. It is slightly bulkier than the Anker above, and the brand is less established, but for students or anyone on a very tight budget, the value here is simply unmatched in 2026.
Pros
- Outstanding value at under £15
- 22.5W fast charging beats many pricier rivals
- Three output ports including USB-C
Cons
- Bulkier than premium slim options
- Brand less well-known than Anker or RavPower
Anker 737 Power Bank (PowerCore 26K)
For those who need serious portable power — think remote workers, frequent travellers, or anyone running a laptop away from a socket — the Anker 737 justifies every penny of its higher price tag. Its 26,800mAh capacity is enough to charge a MacBook Air to full and still have juice left for your iPhone, and the 65W USB-C Power Delivery output means your laptop charges at near-wall-adaptor speeds. The standout feature is the smart digital display that shows remaining battery percentage, input/output wattage in real time, and estimated time remaining — information that cheaper power banks simply do not provide. At around 642g it is not something you will pop in a jeans pocket, but as a bag companion for long-haul flights or off-site working days, it is in a class of its own.
Pros
- 65W USB-C PD can charge a laptop at full speed
- Smart digital display shows real-time wattage and battery %
- Massive 26,800mAh capacity for multi-day use
Cons
- Heavy at 642g — not truly pocket-portable
- Premium price may be overkill for phone-only users
Who Should Buy a Budget Portable Charger?
Budget portable chargers are ideal for the vast majority of everyday users — students heading to university, commuters relying on public transport, festival-goers, holidaymakers, and anyone who finds their smartphone battery flagging by mid-afternoon. If you primarily need to top up a single smartphone during a day out, a 10,000mAh model in the £13–£30 range will serve you perfectly well. You do not need to spend more unless you have a specific reason to do so.
Remote workers, digital nomads, and travellers who carry a laptop, tablet, and phone will benefit from stepping up to a higher-capacity model like the Anker 737. That said, even the premium option in our guide is considered affordable compared to enterprise-grade power stations. The key is matching capacity and wattage to your actual daily usage rather than over-spending on features you will never use.
Final Verdict
In 2026, you genuinely do not need to spend a lot of money to get a brilliant portable charger. The Anker PowerCore Slim 10000 remains our top pick for most people — it is slim, dependable, and priced fairly at around £28. If budget is your absolute priority, the INIU BI-B3 is a jaw-dropping deal under £15 that outperforms its price tag at every turn. For power users needing laptop-level charging on the go, the Anker 737 is the premium step-up worth every penny. Whichever you choose, a quality portable charger is one of the most cost-effective gadget investments you can make this year.
Frequently Asked Questions
What is the best budget portable charger for under £20 in the UK?
The INIU BI-B3 10000mAh power bank is our top pick under £20, regularly available for around £13–£16 on Amazon UK. It offers 22.5W fast charging, three output ports, and solid build quality that rivals chargers costing far more. For just a few pounds more, the Anker PowerCore Slim 10000 at around £28 offers even better reliability and a slimmer form factor.
How many mAh do I need in a portable charger?
For charging a single smartphone once or twice per day, a 10,000mAh power bank is sufficient — it will fully charge most modern phones roughly 1.8 to 2.2 times depending on the phone’s battery size. If you need to charge multiple devices or a tablet, look for 20,000mAh or more. For laptop charging, you will want at least 26,000mAh with a 65W USB-C PD port.
Are cheap portable chargers safe to use?
Reputable budget brands such as Anker, INIU, and Baseus include essential safety protections — over-charge protection, short circuit protection, and temperature control — making them safe for everyday use. Avoid unbranded chargers sold for under £5 with no safety certifications, as these can pose genuine risks. Always look for CE marking and reviews confirming safe long-term use.
Can I take a portable charger on a plane?
Yes, but only in your hand luggage — power banks are not permitted in checked baggage on most airlines due to fire risk regulations. Most airlines allow power banks up to 100Wh (roughly 27,000mAh at 3.7V) in carry-on bags without special permission. Banks between 100Wh and 160Wh may require airline approval, so always check with your carrier before travelling.
How long does a budget portable charger take to recharge itself?
Recharge time depends on the bank’s capacity and the input wattage it supports. A typical 10,000mAh budget power bank charged via a 5W USB-A charger can take 5–6 hours to refill. If the bank supports 18W or higher USB-C input, that time drops to around 2.5–3 hours. Always use a quality wall adaptor and a good-quality USB-C cable for the fastest possible recharge.