How to Pick the Right Power Bank for a Long Day in Vancouver

The right power bank for a long day out is one that matches your phone’s charging port, holds enough charge for one or two full top-ups, and is light enough that you actually carry it. For most people that means a USB-C power bank in the 10,000 mAh range with USB Power Delivery. Here’s how to read the label and choose well, whether you’re commuting into Downtown Vancouver or spending a full day exploring the city.

How much capacity do you actually need?

Power bank capacity is printed in milliamp-hours (mAh). It’s tempting to buy the biggest number you can find, but bigger also means heavier, and a power bank left at home because it’s a brick does you no good.

• About 5,000 mAh: pocket-sized. Usually enough to rescue a phone that’s running low, but often not a full charge for a recent phone.
• About 10,000 mAh: the sweet spot for most people. Typically good for roughly one to two full phone charges, depending on the phone, and still easy to carry in a jacket or small bag.
• About 20,000 mAh and up: useful for multi-day trips, festivals, sharing with friends, or charging a tablet or laptop. Noticeably heavier.

A simple rule: think about the worst day you usually have, such as a long shift, a full day of maps and photos, or a late night out, and buy enough for that day plus a little margin.

Why you get less than the number on the box

The mAh rating describes the battery cells inside the power bank, not what reaches your phone. Converting that stored energy to the voltage your phone needs loses some of it as heat, and your phone also loses a bit while charging. So a 10,000 mAh power bank will not deliver 10,000 mAh into your phone.

A more honest number is watt-hours (Wh), which many power banks print on the back. You can estimate it yourself: multiply the mAh by the cell voltage (often 3.6 or 3.7 V) and divide by 1,000. For example, 10,000 mAh at 3.7 V is about 37 Wh. Watt-hours also matter for air travel, which we cover below.

Ports and fast charging: match your phone

Capacity is only half the story. How fast a power bank refills your phone depends on its ports and the charging standard it supports.

Check your phone’s port

• USB-C: iPhone 15 and newer, and almost all current Android phones, including Samsung Galaxy models.
• Lightning: iPhone 14 and older. You’ll need a USB-C to Lightning cable to use a USB-C power bank.

Not sure which cable you need? Our guide to USB-C vs Lightning cables walks through it.

Look for USB Power Delivery

For quick top-ups on iPhones and many Android phones, look for a USB-C port labelled PD or USB Power Delivery. Some Samsung phones charge fastest with a feature Samsung calls PPS (Programmable Power Supply), which is part of the USB PD standard; if fast charging matters to you, check that the power bank lists it. Fast charging only works when the power bank, the cable and the phone all support the same standard, so a slow or worn cable can quietly cap your speed.

Other features worth having

• A USB-C input so you can recharge the power bank with the same charger and cable as your phone.
• Two outputs if you often charge earbuds or a second phone at the same time.
• A clear charge indicator, either lights or a small display, so you know when the bank itself needs charging.
• Pass-through charging (charging the bank and your phone at once) is handy overnight, but not every model supports it, so check the manual.

Wireless and magnetic power banks

Magnetic power banks that snap onto the back of a phone are convenient on the move: no cable dangling while you walk or ride transit. The trade-off is that wireless charging is generally slower and less efficient than a cable, and the phone and power bank both get warmer. They work best with phones that support magnetic alignment, such as iPhones with MagSafe or phones in a magnetic-compatible case. A thick or non-magnetic case can stop them attaching properly.

If you mainly want maximum charge per gram, a cabled power bank is the better choice. If you want grab-and-go convenience, magnetic can be worth it.

Taking a power bank on a plane

If you’re flying out of YVR or visiting Vancouver from elsewhere, know the rules before you pack. Under Transport Canada’s dangerous goods rules, spare lithium batteries, including power banks, must go in your carry-on, never in checked luggage.

• Up to 100 Wh: generally allowed in carry-on. Most phone power banks, including typical 10,000 and 20,000 mAh models, fall under this.
• Over 100 Wh up to 160 Wh: needs your airline’s approval.
• Over 160 Wh: not allowed on passenger aircraft.

Airlines can set stricter rules of their own, such as limits on how many power banks you carry or whether you may use one in flight, so check with your airline before you travel. Make sure the capacity is printed clearly on the power bank; security staff may need to see it.

Safety: what to avoid

Power banks contain lithium-ion cells, which are safe when well made and treated properly, but deserve some respect.

• Avoid unbranded power banks with no safety certification marks or no capacity rating printed on them.
• Don’t leave a power bank in a hot car, in direct sun, or charging under a pillow or blanket.
• Stop using it if it swells, bulges, gets unusually hot, makes a hissing sound or smells strange. Don’t puncture it or throw it in the garbage; take it to a battery recycling drop-off. In B.C., Call2Recycle lists drop-off locations.
• Don’t try to open or repair a power bank yourself.

If a power bank ever starts smoking or swelling quickly, move away from it and keep it away from anything flammable. Don’t put it in a bag or pocket.

Getting the most out of the one you have

• Charge it the night before a big day; most power banks slowly lose charge sitting in a drawer.
• Top it up every few months even when you’re not using it, so the cells don’t sit fully empty.
• Use a short, good-quality cable; long, cheap cables waste charge and slow things down.
• Lower your phone’s screen brightness and turn on low power mode on long days so each charge goes further.

Caught without one? See our list of places to charge your phone downtown.

Find a power bank and cable at MyChoice on Granville Street

MyChoice Mobile Repair is a phone repair and accessories kiosk in Downtown Vancouver at 798 Granville St, open every day from 9 AM to midnight. We carry power banks, charging cables and chargers. Bring your phone along and we’ll help you match the right port and charging type. And if your phone won’t charge no matter what you plug in, the problem may be the phone’s charging port; we offer charging port repair. Call (236) 785-8300 to check what’s available, or ask for a quote.