5 reasons you should buy smaller portable battery banks


When the time comes to buy a portable external battery, you have to choose between the largest one you can afford or going for a smaller one. I’m here to argue that smaller is better.

Don’t get me wrong—big batteries are great. I have portable batteries big enough to power my house. But I’ve surrounded those batteries with a bunch of small ones.

You won’t want to carry that big battery around

Ugreen Power Bank Charging multiple items at once Credit: Jerome Thomas / How-To Geek

The reason is in the name. These are portable battery banks, and their utility depends first and foremost on how portable they actually are.

Battery banks with larger capacities aren’t carrying around the same size “tank” with more energy poured inside. That’s not how this works. They’re typically made with the same size batteries, just more of them. This is often why they are called battery banks, because they’re a bank of batteries.

Larger battery banks weigh more, and they are thicker. A battery that is twice as heavy and thick is one that takes up more space in your everyday carry bag, feels like more of a burden to lug around, isn’t as comfortable to hold, and may no longer fit in a pants pocket.

A small battery and phone can fit in one hand

But a larger battery will leave you anchored to a table

Many smaller battery banks are roughly the size of smartphones. They’re thin and light enough that you can hold both at the same time. You sandwich the two together, with the back of your phone pressed against the battery. You won’t want to carry your phone around like this long-term, but it’s not insufferable if this is required to finish a long video you and a friend are watching together.

Some batteries are designed with this type of use in mind. Anker MagGo batteries use magnets to latch on to the back of a phone.

An Anker MagSafe battery on the back of an iPhone 15 Pro. Credit: Andrew Martonik / How-To Geek

Anker also makes a Nano line of small batteries that plug into the bottom of your phone without needing a cable, remaining in place almost like a fanny pack for phones. The goal is the same, to be portable power you can depend on without having to put your phone down.

Have more batteries in multiple places

Small batteries cost less money, so you can buy more of them

Batteries are often priced in a way where you’re paying a consistent amount for storage capacity. If 10,000mAh costs $20, then 20,000mAh costs $40. So, if you want 20,000mAh of storage, you can buy either one big battery or two small ones. Personally, I find there are a lot of benefits that come with having multiples.

My wife and I sleep with our bed floating in the middle of the room. The only downside of this is that we don’t have easy access to power outlets. After long setting up a trip wire whenever we wanted to charge at night, we recently started using portable battery banks instead.

An Anker portable power bank in a basket next to a bed. Credit: Bertel King / How-To Geek 

I live in a family of four, so it helps for us to have at least four. That’s enough to provide for the worst-case scenario of everyone needing to charge something at the same time during a power outage or on a trip. It’s also enough to leave one in any of the places we frequently like to charge that isn’t near a wall, like our coffee table or in the dining room.

Screenshot 2026-05-15 at 4.06.12 PM

Ports

USB-A (x2), USB-C output, USB-C input

Weight

0.4lbs

Wireless Charging

No

Capacity

10,000mAh

Flight safe

Yes

This portable power bank weighs less than half a pound and can charge three devices at once. Its 10,000mAh capacity and 12-watt output are modest, but still excellent for the price. 


There’s less at stake when a small battery fails

It was a cheap investment

When you throw your money all at one massive battery, that battery better work. You’ve put all your eggs in one basket, so you don’t have much room for failure.

This happened to me. I paid well over $100 for a 26,800mAh battery powerful enough to charge a laptop. My wife and I bought two, and both failed around the same time. They still came on, but their USB ports appeared to stop working. They would no longer take power in or send power out. They were useless.

Now the batteries I buy are cheap enough that it isn’t that big a deal if one fails. I can buy six of them and still haven’t spent as much money as I would on something like the Anker Power Bank 25K.


DSCF3633


Anker Power Bank 25K (165W, Built-In and Retractable Cables) Review: An Advanced Battery

Don’t worry about finding an outlet with this fast-charging battery.

Now that I’ve replaced my laptop with my phone, I don’t need the 60W charging speeds that are on the more expensive portable batteries. 20W charging is not that far from the max charging speed of my Galaxy Z Fold 6 anyway.

They’re cheap enough to be impulse buys

You’ve spent more money on less useful things

The 10,000mAh batteries I purchased this month only set me back $15 each. That’s not much more than buying two chai lattes on a road trip (which is why I prefer to make mine at home). For a family the size of mine, a couple batteries is way less than the price of stopping for fast food.

In the world of consumer tech, a small battery bank is one of the cheapest accessories you can buy. One costs less than a Bluetooth controller, a Bluetooth speaker, or even a decent pair of earbuds. One of the few accessories that costs less and similarly won’t steer you wrong is a cheap phone stand. Those are similarly handy no matter how much you spend on one.


A foldable phone stand


Why My Must-Have Phone Accessory Is a Cheap Stand

They’re so affordable, you can place one everywhere.

As long as you buy your battery from a reputable brand that’s less likely to catch fire (or more likely to be recalled and replaced if it does), you’re fine.


More batteries, fewer problems

Often enough, it’s the more expensive batteries that have issues these days, since they’re pushing the limits of what current technology can do. Smaller batteries tend to use older, more mature tech. They’re dependable, they’re affordable, and they’re always handy to have around. The more the merrier.



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In short: Accel has raised $5 billion in new capital, comprising a $4 billion Leaders Fund V and a $650 million sidecar, targeting 20-25 late-stage AI investments at an average cheque size of $200 million. The raise follows standout returns from its Anthropic stake (invested at $183B, now valued near $800B) and Cursor (backed at $9.9B, now reportedly around $50B), and lands in a Q1 2026 venture market that deployed a record $297 billion.

Accel, the venture capital firm behind early bets on Facebook, Slack, and more recently Anthropic and Cursor, has raised $5 billion in new capital aimed squarely at AI. The raise, reported by Bloomberg, comprises $4 billion for its fifth Leaders Fund and a $650 million sidecar vehicle, positioning the firm to write average cheques of around $200 million into late-stage AI companies globally.

The fund lands in a venture capital market that has lost any pretence of restraint. Q1 2026 saw $297 billion flow into startups worldwide, 2.5 times the total from Q4 2025 and the most venture funding ever recorded in a three-month period. Andreessen Horowitz has raised $15 billion. Thrive Capital has closed more than $10 billion. Founders Fund is finishing a $6 billion raise. Accel’s $5 billion is substantial but not exceptional in a market where the biggest funds are measured in the tens of billions.

The portfolio that made the pitch

What distinguishes Accel’s fundraise is the portfolio it can point to. The firm invested in Anthropic during its Series G at a $183 billion valuation. Anthropic has since closed a round at $380 billion and is now attracting offers at roughly $800 billion, meaning Accel’s stake has more than quadrupled in value in a matter of months. Anthropic’s annualised revenue has hit $30 billion, a trajectory that no company in history has matched.

The firm’s bet on Cursor has been similarly well-timed. Accel backed the AI code editor in June 2025 at a $9.9 billion valuation. By November, Cursor had raised again at $29.3 billion. By March 2026, the company was reportedly in discussions at a valuation of around $50 billion. For a developer tool that barely existed two years ago, the appreciation is extraordinary.

Accel’s broader AI portfolio extends beyond these two headline positions. The firm has backed Vercel, the frontend deployment platform; n8n, an AI-powered automation tool; Recraft, a professional design platform; and Code Metal, which builds AI development tools for hardware and defence applications. In March 2026, Accel launched an Atoms AI programme in partnership with Google’s AI Futures Fund, selecting five early-stage companies from what it described as a global applicant pool focused on “white space” opportunities in enterprise AI.

The Leaders Fund model

Accel’s Leaders Fund series is designed for later-stage investments, the kind of large cheques that growth-stage AI companies now require. With an average investment size of $200 million and a target of 20 to 25 deals from the new $4 billion fund, the strategy is concentrated: a small number of high-conviction bets on companies that have already demonstrated product-market fit and are scaling revenue.

This is a different game from traditional venture capital. At $200 million per cheque, Accel is competing less with seed and Series A firms and more with the mega-funds, sovereign wealth funds, and corporate investors that have flooded into late-stage AI. The firm’s argument is that its early-stage relationships and technical evaluation capabilities give it an edge in identifying which companies deserve capital at scale, and in securing allocations in rounds that are massively oversubscribed.

Founded in 1983 by Arthur Patterson and Jim Swartz, Accel built its reputation on what the founders called the “prepared mind” approach, a philosophy of deep sector research before investments materialise. The firm’s most famous prepared-mind bet was its 2005 investment of $12.7 million for 10% of Facebook, a stake worth $6.6 billion at the company’s IPO seven years later. The question now is whether Accel’s AI bets will produce returns of comparable magnitude.

What the market is pricing

The sheer volume of capital flowing into AI venture funds reflects a market consensus that artificial intelligence will be the dominant technology platform of the next decade. The numbers are difficult to overstate. OpenAI raised $120 billion in 2026. Anthropic has raised more than $50 billion. xAI closed $20 billion. Waymo secured $16 billion. These are not venture-scale numbers; they are infrastructure-scale capital deployments that would have been unthinkable outside of telecommunications or energy a decade ago.

For limited partners, the investors who commit capital to venture funds, the logic is straightforward: the returns from AI’s winners will be so large that even paying premium valuations will generate exceptional multiples. Accel’s Anthropic position, where a single investment has appreciated several times over in months, is exactly the kind of outcome that makes LPs willing to commit $5 billion to a single firm’s next fund.

The risk is equally visible. Venture capital is a cyclical business, and the current fundraising boom has the characteristics of a cycle peak: record fund sizes, compressed deployment timelines, and a concentration of capital in a single sector. The last time venture capital raised this aggressively, during the 2021 ZIRP era, many of those investments were marked down significantly within two years. AI’s commercial traction is far stronger than the crypto and fintech bets that defined that earlier cycle, but the valuations being paid today leave little margin for error.

The concentration question

Accel’s fund also highlights a structural shift in venture capital. The industry is bifurcating into a small number of mega-firms that can write cheques of $100 million or more and a long tail of smaller funds that compete for earlier-stage deals. The middle ground, the traditional Series B and C investors, is being squeezed by mega-funds moving downstream and by AI companies that skip traditional funding stages entirely, going from seed round to billion-dollar valuations in 18 months.

For a firm like Accel, which operates across offices in Palo Alto, San Francisco, London, and India, the $5 billion raise is a bet that it can maintain its position in the top tier as fund sizes inflate and competition for the best deals intensifies. Its portfolio of 1,199 companies, 107 unicorns, and 46 IPOs provides a track record. But in a market where Anthropic alone could generate returns that justify an entire fund, the temptation to concentrate bets on a handful of AI winners is strong, and the consequences of getting those bets wrong are correspondingly severe.

The broader picture is that AI venture capital has entered a phase where the funds themselves are becoming as large as the companies they once backed. Accel’s $5 billion raise would have made it one of the most valuable startups in Europe just a few years ago. Now it is table stakes for a firm that wants to participate meaningfully in the rounds that matter. Whether this represents rational capital allocation or the peak of a cycle that will eventually correct is the question that every LP writing a cheque today is, implicitly or explicitly, answering in the affirmative.



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