Power Bank & mAh Guide

Power, On the Go.

Discover MagSafe and Qi wireless power banks, mAh explained, and how to choose the right capacity for daily carry or travel.

Right-Sized Power Magnetic wireless power banks for daily carry and travel.

MagSafe + Qi Wireless

Magnetic wireless power banks with built-in extras.

Airline Carry-On Safe

Meets standard flight regulations for portable batteries.

30-Day Returns

Try your power bank risk-free with easy returns.

US-Based Support

Simple guidance before and after your purchase.

Power Bank Capacity

What Does mAh Mean? (Power Bank Capacity Explained)

mAh stands for milliamp-hours — it's the unit that describes how much electrical charge a power bank can store. A higher mAh rating generally means more total charges before you need to recharge the power bank itself.

A power bank rarely delivers its full rated capacity to your device. Some energy is lost during conversion, so real-world output typically runs lower than the number printed on the box — this is normal and true across every brand, not a flaw specific to any one power bank.

That's why matching capacity to how you actually use a power bank matters more than chasing the highest mAh number. A slim 5,000mAh bank covers a full day of phone top-ups; a 10,000mAh bank covers multiple devices or multiple days away from an outlet.

5,000 mAh — PowerGo Slim
10,000 mAh — PowerGo
MagSafe + Qi Wireless
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What Does mAh Mean? (Power Bank Capacity Explained)

PowerGo vs PowerGo Slim — Which Do You Need?

Both power banks use magnetic wireless charging. Here's how to decide between maximum capacity and everyday-carry convenience.

Both use MagSafe-style magnetic snap-on charging — the difference is capacity vs. everyday carry. PowerGo prioritizes total power and multi-device charging. PowerGo Slim prioritizes pocketability and features built around one phone.
PowerGo

10,000mAh — Maximum Power

Multi-device charging hub
  • ✓ 10,000mAh capacity for multiple full charges
  • ✓ Built-in Lightning and USB-C cables — no cables to carry
  • ✓ 15W magnetic + 22.5W wired output
  • ✓ Charges up to 4 devices from one bank
  • ✓ Airline carry-on safe
  • ⚠ Larger and heavier than Slim

Best for: Travel, multi-device households, longer days away from an outlet

Shop PowerGo
PowerGo Slim

5,000mAh — Everyday Carry

Slim, pocketable, feature-packed
  • ✓ 5,000mAh — enough for a full day of phone top-ups
  • ✓ Slimmer profile built for pocket and bag carry
  • ✓ Built-in Apple Watch 2.5W charging
  • ✓ Magnetic cardholder wallet built in
  • ✓ Built-in kickstand for hands-free viewing
  • ⚠ Lower total capacity than PowerGo

Best for: Daily carry, Apple Watch owners, minimalist setups

Shop PowerGo Slim

Want to understand how wireless charging speed works? Read our Qi2 Wireless Charging Guide →

Wireless vs Wired Charging: What Actually Matters
Wireless vs Wired Charging

Wireless vs Wired Charging: What Actually Matters

Both PowerGo and PowerGo Slim support magnetic MagSafe-style wireless charging along with standard Qi wireless charging for other devices — no cable required for your phone.

Wireless charging is convenient, but wired charging through USB-C is typically faster for the same wattage rating, since it avoids the small efficiency loss inherent to wireless power transfer. If you need the fastest possible top-up, PowerGo's built-in cables give you that wired option in the same device.

Airline carry-on rules for power banks are based on watt-hours (Wh), not mAh. Standard consumer power banks — including PowerGo and PowerGo Slim — fall comfortably within standard carry-on limits.

15W Magnetic Wireless
22.5W Wired (PowerGo)
Carry-On Safe for Air Travel
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Find the Right Power Bank for How You Charge

Not every power bank fits every lifestyle. Here is how to choose the right capacity and features for daily carry, travel, or multi-device charging.

Daily Carry

Slim Enough to Forget It's There

PowerGo Slim's slim profile fits in a pocket or bag without adding bulk, while still delivering a full day of MagSafe top-ups for your iPhone.

Shop PowerGo Slim
Apple Watch Owners

Charge Your Watch Without a Separate Puck

PowerGo Slim has built-in 2.5W Apple Watch charging, so you can top up your watch and phone from the same slim device — no extra charger to pack.

Shop PowerGo Slim
Multi-Device Households

Charge 4 Devices From One Bank

PowerGo's built-in Lightning and USB-C cables plus Qi wireless pad mean phones, earbuds, and tablets can all charge from a single 10,000mAh bank without hunting for cables.

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Travel

Airline-Safe Power for Long Trips

Both PowerGo and PowerGo Slim are airline carry-on safe, with enough capacity to get through long flights, layovers, and days away from a wall outlet.

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Wallet Replacement

One Slim Device Instead of Three

PowerGo Slim's built-in magnetic cardholder carries your cards or ID, replacing a separate wallet, phone stand, and portable charger with one slim device.

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Hands-Free Viewing

Prop, Charge, and Watch

Both PowerGo and PowerGo Slim include a built-in kickstand, so you can charge your phone while it's propped up for video calls, streaming, or navigation.

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Why Choose The Urban Geek for Power Banks?

The Urban Geek focuses on magnetic wireless power banks built for real use — daily carry, travel, and multi-device charging — without unnecessary bulk or price.

MagSafe + Qi Wireless in One

  • Magnetic snap-on charging for MagSafe-compatible iPhones
  • Qi wireless charging for other Qi-compatible devices
  • No cables needed for wireless-first charging

Right-Sized Capacity — 5,000 to 10,000mAh

  • PowerGo Slim — 5,000mAh for daily carry
  • PowerGo — 10,000mAh for multi-device and travel use
  • No overpaying — choose the capacity that matches how you use it

Built-In Extras, Not Add-Ons

  • Built-in kickstand on both PowerGo and PowerGo Slim
  • Built-in cables on PowerGo — nothing extra to pack
  • Built-in cardholder wallet on PowerGo Slim

Travel-Ready by Design

  • Airline carry-on safe — both models meet standard flight regulations
  • Compact builds made for bags, pockets, and carry-ons
  • LED battery display so you always know remaining power

Built-In Safety Protections

  • Overcurrent protection (OCP) on every unit
  • Overvoltage protection (OVP) for daily peace of mind
  • Temperature protection during charging

Value Without the Bulk

  • Factory-direct pricing on both models
  • 1-year warranty included
  • 30-day returns + US support — buy with confidence

Power Bank Questions Answered

What does mAh mean on a power bank?

mAh stands for milliamp-hours — it measures how much electrical charge a power bank can store. A higher mAh rating generally means more total charges before the power bank itself needs to be recharged.

How many mAh do I need?

For daily phone top-ups, 5,000mAh (like PowerGo Slim) is typically enough for a full day. For multi-device charging or longer trips away from an outlet, 10,000mAh (like PowerGo) gives more headroom.

Does a 10,000mAh power bank fully charge my phone 3 times?

Not quite — a power bank rarely delivers its full rated capacity to your device due to normal energy loss during conversion. Real-world charges are typically fewer than the math suggests, which is normal across all power bank brands.

What is a MagSafe power bank?

A MagSafe power bank uses magnets to snap securely onto the back of a MagSafe-compatible iPhone and charge it wirelessly, without needing a cable or precise alignment.

Is a magnetic power bank the same as a MagSafe power bank?

They're closely related. "Magnetic power bank" is the general term for any power bank that attaches magnetically; "MagSafe power bank" specifically refers to ones built to Apple's MagSafe magnetic alignment standard.

Can I use a magnetic power bank with Android phones?

Yes, for wireless charging — most magnetic power banks also support standard Qi wireless charging, which works with Qi-compatible Android phones, though the magnetic snap-on alignment is designed specifically for MagSafe iPhones.

Is wireless charging slower than wired charging?

Generally yes, for the same wattage rating — wireless charging has a small efficiency loss that wired USB-C charging avoids. If speed matters more than convenience, a wired connection is typically faster.

Can I bring a power bank on a plane?

Yes — standard consumer power banks, including PowerGo and PowerGo Slim, fall within typical airline carry-on limits. Airline rules for power banks are based on watt-hours (Wh), not mAh, and power banks generally must be packed in carry-on luggage, not checked bags.

Why is my power bank not charging my phone?

Common causes include a low power bank charge, a phone case that's too thick for magnetic alignment, debris on the charging contacts, or a wireless charging mode that's been accidentally disabled. Checking the power bank's own battery level first is usually the fastest first step.

Can I charge the power bank and my phone at the same time?

Many power banks, including PowerGo, support pass-through charging — charging the bank itself while also outputting power to a connected device — though this can be slower than charging each separately.

What's the difference between PowerGo and PowerGo Slim?

PowerGo is a 10,000mAh power bank with built-in Lightning and USB-C cables for multi-device charging. PowerGo Slim is a 5,000mAh, slimmer everyday-carry option with a built-in Apple Watch charger and magnetic cardholder wallet.

Does PowerGo Slim charge my Apple Watch?

Yes — PowerGo Slim has a built-in 2.5W Apple Watch charging output, separate from its main wireless charging surface for your phone.

Can I keep cards in the PowerGo Slim wallet with my phone attached?

Yes — the magnetic cardholder is built into PowerGo Slim specifically so you can carry cards and charge your phone from the same slim device.

How do I know how much charge is left in my power bank?

Both PowerGo and PowerGo Slim include an LED battery display that shows the remaining charge level at a glance, so you're not caught off guard by a dead power bank.

What safety protections should a good power bank have?

Look for overcurrent protection (OCP), overvoltage protection (OVP), and temperature protection — these guard against the most common causes of battery pack failure or device damage during charging.

Will a thick phone case affect magnetic charging?

Thick or metal phone cases can weaken magnetic alignment and reduce wireless charging efficiency. Slim, MagSafe-compatible cases generally work best with magnetic power banks.

Can I use the kickstand while charging?

Yes — the built-in kickstand on PowerGo and PowerGo Slim is designed to prop your phone up for hands-free video calls, streaming, or navigation while it charges.

How do I recharge the power bank itself?

Both PowerGo and PowerGo Slim recharge via USB-C. Using a higher-wattage USB-C charger, like PowerPort 30 or 45, will recharge the power bank faster than a low-wattage charger.

What should I look for when buying a power bank?

Match capacity (mAh) to how you actually use it, check whether you need MagSafe magnetic alignment or just standard Qi wireless, look for built-in safety protections, and consider extras like a kickstand or built-in cables based on your daily habits.

Why do people choose The Urban Geek for power banks?

The Urban Geek offers both a maximum-capacity option (PowerGo) and an everyday-carry option (PowerGo Slim), both with MagSafe and Qi wireless charging, built-in safety protections, and factory-direct pricing without unnecessary markup.

Power, Simplified.

Shop magnetic wireless power banks from The Urban Geek — right-sized power for daily carry and travel.