I'm in the market for a MagSafe battery pack for my iPhone and feeling a little overwhelmed by all the options out there. I'm looking for something reliable, efficient, and ideally not too bulky.

What are your experiences? Any specific brands or models you absolutely love (or hate)?

Looking for the "best" in terms of:

• Charging speed

• Capacity vs. Size

• Durability

• Value for money

• Any extra features (like pass-through charging, etc.)

Hey r/GalaxyFold

I got tired of the wildly inaccurate capacity claims from MagSafe battery pack manufacturers and the constant gamble of whether a new pack would actually fit my phone case. So, I went down a bit of a rabbit hole, bought 14 different packs (including a ridiculous Haribo-branded one for a laugh), and decided to test them all.

My goal was to find out two main things: what's the real capacity behind the marketing, and how well do they fit with a couple of popular case styles for phones with larger camera bumps?

This is my first time doing a big write-up like this, so please bear with me if the formatting isn't perfect. I welcome any and all constructive feedback in the comments! Let's get to the data.

A Quick Note on Efficiency & My Testing Method

Before we dive in, let's talk about efficiency.

• Wireless charging (MagSafe/Qi2) is only about 60% efficient, with the rest lost as heat. So, a 5,000 mAh pack should deliver about 3,000 mAh... IF the packs didn't lie about their capacity.

• Wired charging is much better, at about 80-90% efficient.

Because of the misleading advertised numbers, I performed a wired 100-0% discharge test on each pack to find its true capacity.

My (non-scientific) wireless charging test was done as follows:

• Case: Generic AliExpress MagSafe case.

• Conditions: The phone was placed face up on my bed with the battery pack underneath it (pack touching the bed). The screen was on the entire time running Battery Guru, at about 1/3rd brightness.

• Disclaimer: Nothing here is sponsored and there are no affiliate links. This is purely for informational purposes for my fellow Fold friends.

The Cases

I am testing the fit of each battery pack with the following cases:

• FNT Case with camera bump cutout

• Generic Aramid MagSafe case with a flowing camera plynth

• Thinborne magsafe case with close hugging camera plynth - ⏳ (Awaiting delivery for testing)

THE TESTING: 5,000 mAh Units

Kuulaa MagOn Slim

• The Good: Ridiculously thin, feels incredible, supports passthrough.

• The Bad: No bottom magnet, slides around, got a bit hot.

• Test Results:

  • Wireless Speed: ~5-6W (115 mAh in 5 mins)

  • Actual Capacity (Wired Test): 1500 mAh

• Case Fit:

  • FNT Case: ✅ Fits.

  • Generic Case: ❌ Does not fit (sits at an angle).

  • Thinborne Case: ⏳ (Awaiting test)

Vonuv Ultra slim

• The Good: Second thinnest unit, nice digital readout, supports passthrough.

• The Bad: Weak bottom magnet, felt a bit hot.

• Test Results:

  • Wireless Speed: ~5-6W (117 mAh in 5 mins)

  • Actual Capacity (Wired Test): 2500 mAh

• Case Fit:

  • FNT Case: ✅ Fits.

  • Generic Case: ❌ Does not fit (sits at an angle).

  • Thinborne Case: ⏳ (Awaiting test)

Kuulaa "slim" with ring stand

• The Good: Stayed cool, has a built-in stand, supports passthrough.

• The Bad: Stand/ring is hard to pull out, no bottom magnet.

• Test Results:

  • Wireless Speed: ~5-6W (116 mAh in 5 mins)

  • Actual Capacity (Wired Test): 2200 mAh

• Case Fit:

  • FNT Case: ✅ Fits.

  • Generic Case: ❌ Does not fit (sits at an angle).

  • Thinborne Case: ⏳ (Awaiting test)

Sharge Carbonmag 5k

• The Good: Cool aesthetic, feels light, decent bottom magnet, supports passthrough.

• The Bad: Feels almost too light, borderline cheap.

• Test Results:

  • Wireless Speed: ~5-6W (112 mAh in 5 mins)

  • Actual Capacity (Wired Test): 2200 mAh

• Case Fit:

  • FNT Case: ✅ Fits.

  • Generic Case: ❌ Does not fit (sits at an angle).

  • Thinborne Case: ⏳ (Awaiting test)

Baseus PicoGo 5k

• The Good: Small footprint makes for a fantastic grip, super strong magnets, decent kickstand, passthrough support.

• The Bad: It's pretty thick.

• Test Results:

  • Wireless Speed: ~5-6W (104 mAh in 5 mins)

  • Actual Capacity (Wired Test): 2200 mAh

• Case Fit:

  • FNT Case: ✅ Fits.

  • Generic Case: ✅ Fits! (with a tiny, barely noticeable slant).

  • Thinborne Case: ⏳ (Awaiting test)

ummz magnetic 5k

• The Good: Supports passthrough, stayed cool.

• The Bad: Chunky, feels cheap, no bottom magnet. Not a fan.

• Test Results:

  • Wireless Speed: ~5-6W (113 mAh in 5 mins)

  • Actual Capacity (Wired Test): 3200 mAh

• Case Fit:

  • FNT Case: ✅ Fits.

  • Generic Case: ❌ Does not fit (sits at an angle).

  • Thinborne Case: ⏳ (Awaiting test)

LISEN 0.3" Ultra Slim

• The Good: Medium thickness, supports passthrough.

• The Bad: Feels cheap, no bottom magnet, incredibly slow charging. Hard skip.

• Test Results:

  • Wireless Speed: ~2.5-3.5W (64 mAh in 5 mins)

  • Actual Capacity (Wired Test): 2800 mAh

• Case Fit:

  • FNT Case: ✅ Fits.

  • Generic Case: ❌ Does not fit (sits at an angle).

  • Thinborne Case: ⏳ (Awaiting test)

Generic apple watch style battery pack

• The Good: Supports passthrough.

• The Bad: Thick, feels cheap, gimmick "crown" is garbage, no bottom magnet, charging speed dropped mid-test.

• Test Results:

  • Wireless Speed: Dropped from ~6W to 3W (86 mAh in 5 mins)

  • Actual Capacity (Wired Test): 2600 mAh

• Case Fit:

  • FNT Case: ✅ Fits.

  • Generic Case: ❌ Does not fit (sits at an angle).

  • Thinborne Case: ⏳ (Awaiting test)

Anker 622

• The Good: It's Anker. Supports passthrough.

• The Bad: Pretty thick, kickstand isn't great, weak bottom magnet, slow wireless charging.

• Test Results:

  • Wireless Speed: ~3-4W (62 mAh in 5 mins)

  • Actual Capacity (Wired Test): 3100 mAh

• Case Fit:

  • FNT Case: ✅ Fits.

  • Generic Case: ❌ Does not fit (sits at an angle).

  • Thinborne Case: ⏳ (Awaiting test)

Minthouz Magnetic 5k

• The Good: Extra USB-A and USB-C ports, passthrough support, has a bottom magnet, stayed cool.

• The Bad: On the thicker side.

• Test Results:

  • Wireless Speed: ~5-6W (118 mAh in 5 mins)

  • Actual Capacity (Wired Test): 3000 mAh

• Case Fit:

  • FNT Case: ✅ Fits.

  • Generic Case: ❌ Does not fit (sits at an angle).

  • Thinborne Case: ⏳ (Awaiting test)

INIU for MagSafe, ultra slim 5k

• The Good: Quite slim, nice kickstand, awesome lanyard that doubles as a built-in USB-C cable, has a bottom magnet, supports passthrough.

• The Bad: Got a bit warm.

• Test Results:

  • Wireless Speed: ~5-6W (136 mAh in 5 mins)

  • Actual Capacity (Wired Test): 3200 mAh

• Case Fit:

  • FNT Case: ✅ Fits.

  • Generic Case: ❌ Does not fit (sits at an angle).

  • Thinborne Case: ⏳ (Awaiting test)

THE TESTING: 10,000 mAh Units

Mekiki Portable Charger

• The Good: Raised MagSafe ring for universal case compatibility, bonus USB-A port, passthrough support, high true capacity.

• The Bad: Very thick, no bottom magnet.

• Test Results:

  • Wireless Speed: ~5-6W (120 mAh in 5 mins)

  • Actual Capacity (Wired Test): 6000 mAh

• Case Fit:

  • FNT Case: ✅ Fits.

  • Generic Case: ✅ Fits!

  • Thinborne Case: ⏳ (Awaiting test)

iWalk Magnetic Power Bank

• The Good: Raised ring for compatibility, strong bottom magnet, built-in wired charging cable, passthrough support.

• The Bad: Second thickest overall, sticks out from the bottom of the phone.

• Test Results:

  • Wireless Speed: ~5-6W (126 mAh in 5 mins)

  • Actual Capacity (Wired Test): 6100 mAh

• Case Fit:

  • FNT Case: ✅ Fits.

  • Generic Case: ✅ Fits!

  • Thinborne Case: ⏳ (Awaiting test)

Haribo branded DHCK 10000 mAh powerbook

• The Good: Has a built-in cable and supports passthrough. Fits the generic case.

• The Bad: Not very good overall. Weak bottom magnet, got a bit hot, and has a very low true capacity for its advertised size.

• Test Results:

  • Wireless Speed: ~5-6W (125 mAh in 5 mins)

  • Actual Capacity (Wired Test): 5200 mAh

• Case Fit:

  • FNT Case: ✅ Fits.

  • Generic Case: ✅ Fits!

  • Thinborne Case: ⏳ (Awaiting test)

⭐ My Personal Favorites ⭐

• Baseus PicoGo 5k: My top choice for a daily driver. Even with a lower actual capacity (2200 mAh), its compact size, amazing grip, and super-strong magnets are unbeatable. It's also one of the few 5k packs that fits my generic case.

• INIU ultra slim 5k: A very close second. It has one of the highest true capacities (3200 mAh) of the 5k bunch, is quite slim, and has that cool-as-hell lanyard that's also a built-in USB-C cable. A fantastic all-rounder.

Summary / TL;DR

• Advertised Capacity is a Lie: Every single battery pack tested well below its advertised mAh. "5000 mAh" packs ranged from 1500 to 3200 mAh. The "10000 mAh" packs were a wide spread from a disappointing 5200 mAh to a more honest 6100 mAh.

• Case Fit is Crucial: For cases with a continuous camera ridge (like many aramid fiber/Thinborne styles), most flat battery packs will not fit. You need one with a smaller footprint (like the Baseus) or a raised MagSafe ring.

• Top Picks:

  • For Everyday Carry: Baseus PicoGo (best grip & magnet) and INIU 5k (highest 5k capacity & clever cable).

  • For Max Capacity: iWalk 10k or Mekiki 10k. Both are true ~6000 mAh packs that fit all cases tested so far.

• Notable Mentions:

  • The Joke Entry: The Haribo 10k pack underdelivered significantly on capacity (5200 mAh) but does fit the generic case. Buy it for the memes, not the performance.

• Avoid: The LISEN Ultra Slim due to its painfully slow charging speed.

• Coming Soon: I will update this post once the Thinborne case arrives and I've had a chance to test compatibility across the board. Stay tuned!