The best power bank in NZ overall is the Anker Nano 10,000mAh, which ships as a pair, carries a permanently attached USB-C cable and pushes up to 30W, enough to take an iPhone from flat to roughly 50 percent in half an hour. A charged bank is also what you want in the bottom of a bag when a storm takes the power out for a day, which happens often enough here to make capacity worth more than slimness.
A good power bank means you are never caught with a dead phone mid-day, whether that is during travel, at a festival, or just a long day away from a wall outlet. We compared seven power banks available in New Zealand, from simple everyday chargers through to high-wattage laptop-capable banks and magnetic MagSafe-style options, to help match a bank to how you actually use it.
Each pick below is grouped by what it does best rather than by price alone, covering everyday phone top-ups, multi-day capacity, fast laptop charging, and rugged or magnetic designs.
Quick comparison
| Power Bank | Best For | Capacity | Max Output |
|---|---|---|---|
| Anker Nano 10,000mAh | Best Overall | 10,000mAh (x2) | 30W |
| FOCHEW 13,800mAh | Best Budget | 13,800mAh | 15W (PD) |
| Belkin BoostCharge 20,000mAh | Best High-Capacity | 20,000mAh | 15W |
| UGREEN 100W | Best Fast-Charging | 20,000mAh | 100W |
| Anker 622 MagGo | Best Wireless / MagSafe | 5,000mAh (x2) | N/A (magnetic) |
| DEWALT Heavy Duty | Best Rugged / Outdoor | 5,000mAh | 18W |
| Belkin BoostCharge 10,000mAh | Best Slim / Everyday | 10,000mAh | 15W |
1. Anker Nano Power Bank 10,000mAh – Best Overall
The Anker Nano ships as a pair, each unit built around a 10,000mAh cell with a permanently attached USB-C cable that plugs straight into a phone, tablet or laptop without needing a separate lead. The cable itself can also be used to recharge the power bank, so one connection point handles both directions of charging. Output tops out at 30W across the USB-C and USB-A ports, enough to take an iPhone 14 to 50 percent in about 30 minutes.
The compact 10.4 x 5.2 x 2.6cm body uses an outer casing made from 80 percent recycled plastic, and the bidirectional 30W charging means the bank itself recharges to 50 percent in around 45 minutes. Buying it as a pack of two makes it easy to keep one in a bag and one at a desk, or share the second with a housemate or family member.
Pros
- Built-in USB-C cable removes the need to carry a separate charging lead
- 30W bidirectional charging works both to charge a device and to recharge the bank itself
- Sold as a pack of two, useful for a bag-and-desk or two-person setup
- Casing made from 80 percent recycled plastic
Cons
- 10,000mAh per unit is enough for one to one-and-a-half phone charges, not a multi-day supply
- Built-in cable is fixed rather than swappable if it wears out
- USB-A port caps out below the USB-C port’s 30W maximum
Key specs: 10,000mAh capacity per unit (sold as a pack of two), 30W max output/input via built-in USB-C cable plus a USB-A port, 10.4 x 5.2 x 2.6cm, casing made from 80% recycled plastic.
2. FOCHEW 13,800mAh Portable Charger – Best Budget Pick
FOCHEW’s charger packs a 13,800mAh lithium polymer cell into a slim 5.9 x 2.7 x 0.7 inch body weighing 220 grams, with a built-in USB-C cable, a separate cable for iPhone, and an AC wall plug folded into the housing. That combination means it can charge directly from a wall outlet or hand off power to a phone or tablet without needing to pack any extra cables or adapters for a trip.
Four outputs in total, the two built-in cables plus a USB-C and USB-A port, let it charge up to four devices at the same time, and 15W PD fast charging on the USB-C port covers most modern phones. It is compatible with a wide spread of hardware, from iPhone 6 through the current 15 series, Samsung Galaxy S22/S23, Google Pixel, LG, Moto and general Android and tablet devices.
Pros
- Built-in wall plug means it doubles as a charger and a power bank in one unit
- Four outputs (2 built-in cables + USB-C + USB-A) can charge up to four devices at once
- 15W PD fast charging on the USB-C port
- Wide device compatibility across iPhone, Samsung, Pixel and Android hardware
Cons
- FOCHEW is a marketplace brand rather than an established name like Anker or Belkin
- 13,800mAh is a mid-range capacity, roughly one full charge for a larger phone
- Folding wall plug adds bulk compared with a plain power bank
Key specs: 13,800mAh lithium polymer battery, 15W PD USB-C fast charging, 4 total outputs (2 built-in cables + USB-C + USB-A), integrated AC wall plug, 5.9 x 2.7 x 0.7 in, 220g.
3. Belkin BoostCharge 20,000mAh – Best High-Capacity / Multi-Day Pick
Belkin’s 20,000mAh BoostCharge pairs a large-capacity cell with three simultaneous charging ports, a single USB-C port and two USB-A ports, so up to three devices can top up from it at once. Amazon’s own estimate puts roughly 78 hours of extra smartphone battery life in the bank, enough to comfortably cover several days away from a wall outlet.
The USB-C port delivers up to 15W and can charge two devices at once when split with a USB-A port, while a third device draws from the remaining USB-A port at up to 12W. A built-in LED indicator shows the remaining charge level, and the bank ships pre-charged out of the box, with overcharge protection and a 2-year warranty behind it.
Pros
- 20,000mAh capacity covers roughly 78 hours of extra phone battery life
- Three ports (1x USB-C, 2x USB-A) charge up to three devices simultaneously
- LED indicator shows remaining charge at a glance
- Backed by a 2-year warranty
Cons
- 15W max output is modest next to faster 30W-100W banks in this list
- 426g weight and 6.3 x 3.2 x 0.9in size make it noticeably bulkier than a slim daily-carry bank
- No USB-C PD fast charging for laptops
Key specs: 20,000mAh capacity, 15W max output across 1x USB-C + 2x USB-A ports (3 simultaneous), roughly 78 hours added smartphone battery life, 6.3 x 3.2 x 0.9in, 426g, 2-year warranty.
4. UGREEN 100W Power Bank 20,000mAh – Best Fast-Charging Pick
UGREEN’s 100W power bank pairs a 20,000mAh cell with genuinely high-wattage output, a 100W USB-C port for laptops alongside a second 30W USB-C port and a 22.5W USB-A port, so it can run a MacBook Pro 16-inch up to 42 percent in 30 minutes while still charging two other devices. A digital display shows the exact remaining battery percentage rather than a rough LED indicator.
Recharging the bank itself is comparatively fast too, reaching full in about 1.6 hours through its primary USB-C port, though that does require a separately purchased 65W wall charger since one is not bundled in the box. Roughly 20,000mAh translates to about five to seven days of typical phone use, or just over one full charge for a 15-inch MacBook Air.
Pros
- 100W USB-C output can meaningfully fast-charge a laptop, not just a phone
- Three ports (100W + 30W USB-C, 22.5W USB-A) charge multiple devices at once
- Digital display shows an exact battery percentage
- Recharges to full in around 1.6 hours
Cons
- Only 20 reviews visible at time of writing, a thin sample for a 4.9-star average
- 65W wall charger for fast recharging is sold separately
- Larger 20,000mAh/100W design is heavier than a slim everyday bank
Key specs: 20,000mAh capacity, 100W max output on the primary USB-C port (plus 30W USB-C and 22.5W USB-A), full recharge in about 1.6 hours via 65W input, digital percentage display.
5. Anker 622 Magnetic Battery (MagGo) – Best Wireless / MagSafe-Style Pick
The Anker 622 uses Anker’s MiniCell technology to fit a 5,000mAh cell into a slim, pocket-sized body that snaps magnetically onto the back of a MagSafe-compatible iPhone for cable-free charging. A folding kickstand built into the back doubles as a stand for hands-free video calls or watching content once the phone is propped up.
At just 0.5 inches thin and sold as a two-pack, it is easy to keep one clipped in a bag and a second at a desk or in the car. A 23.6-inch USB-C to USB-C cable is included for wired charging or for topping the bank itself back up, backed by a 24-month warranty.
Pros
- Magnetic MagSafe-style attachment charges without a cable
- Built-in foldable kickstand doubles as a video-call or media stand
- Very slim at 0.5 inches thick
- Sold as a two-pack with a 24-month warranty
Cons
- 5,000mAh is a light-use capacity, good for a top-up rather than a full extra charge
- Magnetic charging is generally slower than a wired connection
- Only works at full effect with MagSafe-compatible iPhones
Key specs: 5,000mAh capacity per unit (sold as a pack of two), magnetic MagSafe-compatible wireless charging, built-in foldable kickstand, 4.13 x 2.62 x 0.5in, includes USB-C to USB-C cable.
6. DEWALT Heavy Duty Magnetic Power Bank – Best Rugged / Outdoor Pick
DEWALT’s take on a magnetic power bank wraps a 5,000mAh cell in a rugged, impact-resistant housing rated IP55 for water and dust resistance when its port cover is closed. The strong built-in magnet holds it securely against a MagSafe-compatible iPhone, and it ships with a Type-C to Type-C cable plus a USB adapter for wired charging.
At 150 grams and 4.17 x 2.8 x 0.67 inches it stays pocketable despite the tougher build, aimed at tradies, campers or anyone who wants a backup charger that can handle a knock or a bit of rain rather than a delicate everyday design.
Pros
- IP55 water and dust resistance when the port cover is closed
- Impact-resistant, rugged construction from a well-known tool brand
- Strong magnetic MagSafe-compatible attachment
- Includes a Type-C to Type-C cable and USB adapter
Cons
- 5,000mAh capacity is light-use only, roughly one partial top-up
- Water resistance rating only applies with the port cover properly closed
- Magnetic charging on a 5,000mAh cell is best for topping up rather than a full recharge
Key specs: 5,000mAh capacity, IP55 water/dust resistance (port cover closed), magnetic MagSafe-compatible charging, 4.17 x 2.8 x 0.67in, 150g, includes USB-C to USB-C cable and adapter.
7. Belkin BoostCharge 10,000mAh – Best Slim / Everyday-Portable Pick
The smaller sibling of Belkin’s 20,000mAh bank above, this 10,000mAh version keeps the same three-port layout, one USB-C and two USB-A, in a noticeably slimmer 5.19 x 2.69 x 0.62 inch, 211 gram body that is easier to carry daily in a jacket pocket or small bag. Amazon estimates around 40 hours of extra smartphone battery life from a full charge.
The USB-C port supports 15W PD fast charging, quoted at 50 percent in about 32 minutes, and an LED status light shows remaining charge. It comes pre-charged out of the box and carries the same overcharge protection as the larger model.
Pros
- Slim, light 211g body suited to daily carry
- Three ports (1x USB-C, 2x USB-A) for charging multiple devices
- 15W PD fast charging, 50% in about 32 minutes
- Large, consistent review base (7,188 reviews at 4.4 stars)
Cons
- 10,000mAh is roughly one full smartphone charge, not a multi-day supply
- 15W max output is behind the faster 100W picks in this list
- Still relies on USB-A for two of its three ports
Key specs: 10,000mAh capacity, 15W PD fast charging via USB-C (2x USB-A also fitted), roughly 40 hours added smartphone battery life, 5.19 x 2.69 x 0.62in, 211g.
How to choose a power bank
Start with capacity. A 5,000mAh bank is enough for a partial top-up or two, a 10,000-13,800mAh bank generally covers a full extra charge for a phone, and a 20,000mAh bank can get a phone through several days or add meaningful charge to a laptop.
Check the output wattage next. A phone charges fine from any of the banks here, but a laptop needs a higher-wattage USB-C port, generally 65W or more, to charge at a useful speed rather than just trickle-charging.
Think about how many ports you need and whether a built-in cable matters to you. A bank with a built-in USB-C cable, like the Anker Nano, means one less cable to pack, while a bank with multiple ports lets you charge more than one device from the same bank at once.
Finally, consider the format. A magnetic MagSafe-style bank like the Anker 622 or DEWALT is convenient for topping up an iPhone without a cable, while a heavier-duty rugged design suits outdoor use better than a slim everyday bank.
If you are comparing across the range, the guides to phones for seniors, Spark mobile phones and cheap smartphones are worth a look.
Verdict
For most people, the Anker Nano Power Bank is the easiest all-rounder, its built-in cable and 30W bidirectional charging covering daily use without any extra cables to lose, and coming as a pack of two makes it simple to keep one spare.
Anyone who wants to also charge a laptop should look at the UGREEN 100W bank, while the Belkin BoostCharge 20,000mAh is the better pick for multi-day capacity without the higher price tag of a 100W design. For a cable-free top-up, the Anker 622 MagGo or the tougher DEWALT Heavy Duty magnetic bank both snap straight onto a MagSafe-compatible iPhone.
FAQs
How many watts is best for a power bank?
15-30W is plenty for charging a phone or tablet at a reasonably fast speed. If you also want to top up a laptop, look for at least 65W, and ideally 100W, on the USB-C port.
Can I carry a 20,000mAh power bank on a flight?
Most airlines allow power banks up to 100Wh (roughly a 27,000mAh bank at 3.7V) in carry-on luggage, but not in checked bags. A 20,000mAh bank sits comfortably under that limit, but always check your specific airline’s rules before flying.
What does mAh actually mean for how many charges I get?
mAh measures the battery’s raw capacity, but the actual number of charges you get is lower than a straight capacity comparison suggests, since some energy is lost converting between the bank’s voltage and your device’s battery. As a rough guide, expect a bank to deliver about 60-70% of its rated mAh to your phone.
Does fast charging damage my phone’s battery over time?
Modern phones and power banks negotiate a safe charging speed automatically, and features like Power Delivery (PD) are designed to protect the battery from excess heat. Consistently keeping a phone at a very low or a full 100% charge tends to affect long-term battery health more than the charging speed itself.
Can I use a power bank while it is charging?
Most modern power banks, including the ones in this guide, support pass-through charging, meaning you can plug the bank into the wall and charge a phone from it at the same time. Check the specific listing if this matters, as older or budget banks sometimes handle simultaneous charging less gracefully.
How long do power banks typically last before the battery degrades?
Most lithium-ion power banks are rated for around 300-500 full charge cycles before their capacity drops meaningfully, which for typical use works out to roughly 1-2 years of regular use. Keeping a bank away from extreme heat and avoiding letting it sit fully drained for long periods helps it last closer to the upper end of that range.
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