The Anker 621 MagGo Magnetic Wireless 5,000mAh is the entry-level entry in Anker’s MagGo magnetic line — a slim, lightweight wireless bank that snaps onto the back of any MagSafe-compatible iPhone (iPhone 12 through iPhone 16) and tops it up with no cables. At around $35 it is the sensible first step into magnetic wireless charging. This Anker 621 MagGo review covers the capacity, wireless speed, build and value.
Anker 621 Magnetic Portable Charger (MagGo), 5,000mAh Wireless Power Bank with USB-C Cable, Magsafe-Compatible Battery Pack for iPhone 16/15/14/13/12 Series
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Anker 621 MagGo at a Glance
| Component | Specification |
|---|---|
| Capacity | 5,000mAh / 18.5Wh (3.7V nominal) |
| Maximum output power | 12W wired USB-C / 7.5W magnetic wireless |
| Input fast-charge | 10W USB-C recharge |
| Ports | 1x USB-C (in/out) + magnetic wireless pad (2 outputs) |
| Wireless charging | MagSafe-compatible 7.5W (Qi original) |
| Quick-charge protocols | USB PD 3.0 wired |
| Cycle life and warranty | 500+ cycles to 80% capacity, 18-month Anker warranty |
| Weight and dimensions | 140g; 105 x 67 x 11 mm |
| Approximate price | around $35 |
Capacity and Recharge Time
The 621 MagGo carries 5,000mAh / 18.5Wh of capacity — enough for roughly one full charge of an iPhone 15/16 (and a little extra), or two top-ups of an iPhone Mini or older model. That is deliberately modest; the 621 is a top-up bank, not a multi-day battery, and the capacity choice keeps the chassis slim enough to attach to the back of a phone without making the combination uncomfortable to hold. The 18.5Wh figure is well below airline carry-on limits — no concerns flying internationally. Recharge over the USB-C input at 10W takes around two and a half hours from empty, which is reasonable for a wireless-focused bank where the input port is used less frequently than the wireless face.
Wireless charging efficiency is the other factor that affects effective capacity. The 80% wireless efficiency rate means that of the bank’s 18.5Wh of stored energy, around 14.8Wh actually reaches the phone battery — the rest is dissipated as heat. For a phone with a 15Wh battery (iPhone 15/16) that delivers a full charge with a small reserve; for an iPhone Plus or Pro Max with a larger battery the bank delivers something closer to a 90% charge before running flat. The wired USB-C output, by contrast, is around 95% efficient, so plugging in a cable delivers fractionally more usable charge — useful to know on a long travel day when every percentage point counts.
Fast Charging and Power Delivery
The wired USB-C port delivers up to 12W of USB Power Delivery output — enough for a standard charge on any USB-C phone but not what most buyers will use this bank for. The headline is wireless: 7.5W magnetic wireless to a MagSafe-compatible iPhone. That is the original MagSafe-compatible Qi rating, which is the right number to expect from an entry-tier MagGo at this price. Compared with the Qi2-certified 15W chargers (the Anker MagGo Qi2 and the new Anker 622 MagGo updated models), 7.5W is half the rate — but 7.5W is still meaningfully faster than the 5W any standard Qi pad delivers, and the magnetic alignment guarantees the phone is always positioned correctly on the coil for full efficiency. For users who want full 15W magnetic charging the Anker MagGo Qi2 in this lineup is the right step up.
Wireless and Magnetic Features
The 621’s defining feature is the ring of magnets in the front face, which align with the magnet ring on iPhone 12-16 to lock the bank firmly to the back of the phone. The hold is strong enough that the bank does not slip when the phone is used one-handed, and the alignment means the wireless coils are always perfectly stacked — no fumbling for the right spot. The 621 does not include the integrated kickstand that the larger Anker 622 MagGo offers, so it is a flat puck rather than a stand; for hands-free video viewing the 622 is the better choice, while the 621 is the most pocketable MagGo Anker makes.
Build Quality and Portability
At 140g and just 11mm thick the 621 disappears against the back of an iPhone — phone-and-bank-stacked is still slimmer than many phone-plus-case combinations. The shell is a soft-touch silicone-feel finish in a choice of subtle colours, and the four-LED bar on the side gives clear charge indication. Build is typical Anker quality with an 18-month warranty. The combination of slim profile and full magnetic alignment makes this the easiest magnetic bank to carry in a jacket pocket alongside a phone.
Heat management is the other important build detail. Wireless charging is around 80% efficient — the 20% of power that does not reach the phone battery is dissipated as heat in both the bank and the phone. The 621’s slim aluminium-reinforced shell acts as a heat spreader, and Anker tunes the wireless coil to ramp down output if internal temperatures rise above safe limits, which protects both the bank’s cells and the phone battery from heat-stress damage over years of daily use. That kind of thermal engineering is invisible in normal operation but is the reason the slim MagGo line has maintained its reputation across multiple iPhone generations.
Best For: Phone Top-Up or Laptop?
The 621 is a phone bank, and specifically a single-iPhone top-up bank. It will not meaningfully charge a tablet (too slow and too low capacity), it cannot charge a laptop, and it does not target Android — though the wireless face will charge any Qi phone at 5W if pressed against the coil, only iPhones get the magnetic alignment. The natural buyer is an iPhone user who wants a no-cable top-up for the work day, a transit commute or an evening out. For multi-device use the Anker 633 Magnetic 10,000mAh or the UGREEN Magnetic 10,000mAh are better choices.
Verdict: Is the Anker 621 MagGo Worth Around $35?
Yes, with a clear understanding of what it is. At around $35 the Anker 621 MagGo 5,000mAh is the slimmest, most pocketable way to add a one-charge wireless cushion to an iPhone 12-16. The 7.5W wireless rate is the trade-off compared with newer Qi2 chargers, but the price reflects that. For iPhone users who want the most discreet possible magnetic top-up bank, it remains a sensible buy. Anyone who wants 15W magnetic should step up to the Anker MagGo Qi2 in this same lineup.
Pros: The slimmest profile in the MagGo line at just 11mm thick; magnetic MagSafe-compatible hold to iPhone 12-16 is firm; 50% faster than a standard 5W Qi pad; pocket-friendly 140g weight; 18-month Anker warranty; full PD 3.0 wired fallback at 12W.
Cons: 5,000mAh capacity covers only a single iPhone charge; 7.5W wireless rate is half that of newer Qi2 chargers; no integrated kickstand (the 622 adds one for $15 more); no Apple Watch puck; wired output is only 12W.
Frequently Asked Questions
Will the Anker 621 MagGo work with iPhone 16?
Yes. The 621 attaches magnetically to any MagSafe-compatible iPhone, which includes iPhone 12 through iPhone 16 — alignment and hold are unchanged across the range.
Is the 7.5W wireless charging rate slow?
It is slower than the newer Qi2 15W rate, but it is still 50% faster than any standard 5W Qi pad. For overnight or all-day top-up use the difference is small; for a single quick top-up before leaving the house, Qi2 is faster.
Does the Anker 621 MagGo charge Android phones?
It will wirelessly charge any Qi-compatible phone at the standard 5W rate, but only iPhones get the magnetic alignment — Android phones must be placed carefully on the coil to charge.
Can the Anker 621 MagGo charge a laptop?
No. The 5,000mAh capacity and 12W wired output are not built for laptop charging — for that the Anker 737 140W is the right tool.
More Power Bank Reviews
- Anker 737 140W 24,000mAh Laptop Power Bank Review
- UGREEN 10,000mAh Magnetic Wireless 20W PD Power Bank Review
- Anker 622 MagGo 5,000mAh Foldable Magnetic Review
- Anker Nano 5,000mAh Built-in USB-C Connector Review
- Anker 633 Magnetic 10,000mAh 20W USB-C PD Review
- Jackery Explorer 300 Review: 292Wh Portable Power Station
- Anker Nano 10,000mAh 30W Built-in USB-C Cable Review
- Anker Laptop Power Bank 25,000mAh Triple 100W Review
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