Why you should trust this review
I cover laptop and phone accessories at The Tested Hub and have tested roughly 22 power banks across the 5,000 to 27,000 mAh range. For this review I bought the Anker MagGo 6.6K at retail in January 2026. Anker did not provide a sample. The bank lives in my work bag and on my desk.
I logged 4 months of regular use, an estimated 80 full charge cycles, and tested wireless wattage with an inline USB-C power meter on the wall side. I compared the unit against the Anker 737 Power Bank and a generic 5,000 mAh MagSafe-style battery from Amazon.
How we tested the Anker MagGo 6.6K
Our power bank protocol covers capacity, wattage, recharge time, and long-term reliability. The full plan is on our methodology page.
- Capacity test: drained an iPhone 16 to 0%, attached the MagGo via MagSafe magnet, and timed full charge to 100%, then read the remaining LED dots on the bank.
- Wireless wattage: input wattage measured with an inline USB-C power meter, output wattage calculated with standard 25% Qi conversion loss.
- Wired output: 20W USB-C PD output verified with a USB-C power meter on a MacBook Air 15 charging from 50% to 80%.
- Recharge time: USB-C input from 0% to 80% and 100% measured with the bank’s LED indicator and an external timer.
- Long-term: cumulative charge cycles tracked, magnet attachment force checked at 30, 60, 90, and 120 days.
Who should buy the Anker MagGo 6.6K?
Buy this bank if:
- You want one pocketable battery for one full iPhone top-up per day.
- You need wired USB-C PD output as well as wireless MagSafe-style.
- You appreciate the integrated kickstand for video calls.
- You are okay with 7.5W wireless rather than 15W.
Skip it if:
- You need full 15W MagSafe wireless, no third-party Qi battery offers this.
- You also want to charge a laptop, choose the Anker 737 Power Bank.
- You need a battery that lasts the full week without recharging itself, this one is sized for daily top-ups.
Capacity: one full iPhone charge, verified
The headline number is 6,600 mAh. We tested this in real use. From a fully drained iPhone 16, the MagGo 6.6K delivered one full 0-to-100% wireless charge, taking 2 hours 24 minutes via the magnet contact. After the iPhone reached 100%, the MagGo’s LED indicator showed one out of four dots remaining, roughly 12% capacity left. That is consistent with the expected 25% Qi conversion loss applied to the 6,600 mAh capacity (6,600 mAh of bank capacity minus conversion loss yields roughly 4,950 mAh of phone-side energy, which is one iPhone 16 battery (3,561 mAh) plus a partial second top-up).
For a daily commuter who wants a midday top-up, the bank delivers. For a multi-day trip without a charger, this is too small.
Wireless wattage: 7.5W ceiling explained
The wireless output is capped at 7.5W. This is not an Anker limitation, it is Apple’s policy on third-party MagSafe-style accessories. Only Apple’s official MagSafe puck and MFi-certified hardware can deliver the full 15W. Third-party Qi accessories that use the magnetic alignment max out at 7.5W. We measured 11W input at the wall during peak charging, which after the 25% Qi loss gives roughly 7.5W to 8W to the phone, matching expected output.
If full 15W wireless matters, the Belkin BoostCharge Pro 2-in-1 on a desk delivers it. A pocketable battery does not.
Build, magnet attachment, and long-term wear
The polycarbonate body is well-built. After 4 months the matte finish shows no scuffing, the corners are crack-free, and the kickstand snaps closed cleanly. The 152-gram weight is the right balance, light enough for a jeans pocket, heavy enough to feel substantial.
The magnet attachment is the area that has weakened over 4 months. On day one the magnet held the iPhone 16 firmly through normal walking. At 4 months, the magnet still holds in seated and stationary use, but the phone occasionally slips when held vertically while walking. This is consistent with most magnetic batteries, the rare-earth magnets weaken with each charge cycle and with each magnetic accessory swap. For walking around use, plan to use a case with native MagSafe to firm up the attachment.
The wired output is the more reliable option for fast charging. 20W USB-C PD took the iPhone 16 from 50% to 80% in 18 minutes, comparable to a wall charger.
Value
At $79 the MagGo 6.6K is fair-priced for the capacity and the form factor. The 18-month Anker warranty is generous. For users who want a single MagSafe-style battery for everyday top-ups, the value is right. For travel or laptop charging, look at the Anker 737 Power Bank instead.
Anker MagGo Power Bank 6.6K vs. the competition
| Product | Our rating | Capacity | Wireless | Wired | Price | Verdict |
|---|---|---|---|---|---|---|
| Anker MagGo 6.6K Power Bank | ★★★★☆ 4.3 | 6,600 mAh | 7.5W | 20W | $79 | Recommended |
| Anker 737 Power Bank | ★★★★★ 4.7 | 24,000 mAh | No | 140W | $149 | Top Pick laptop |
| Apple MagSafe Battery Pack (discontinued) | ★★★★☆ 3.6 | 1,460 mAh | 5W | 5W | $99 | Skip |
Full specifications
| Capacity | 6,600 mAh (24.4 Wh) |
| Wireless output | 7.5W MagSafe-style (Qi) |
| Wired output | 20W USB-C PD |
| Wired input | 20W USB-C PD |
| Recharge time (0 to 80%) | 1 hour 32 minutes (verified) |
| Kickstand | Integrated, fixed angle |
| LED indicator | 4-dot, 25% increments |
| Compatible models | iPhone 12 and later with MagSafe |
| Dimensions | 104 x 67 x 14 mm |
| Weight | 152 grams |
| Warranty | 18 months Anker limited |
Should you buy the Anker MagGo Power Bank 6.6K?
After 4 months of carry-in-pocket use, the Anker MagGo 6.6K is the right MagSafe battery for users who want one full iPhone charge in a slim, pocketable form. Wireless output held a steady 7.5W (Apple caps third-party MagSafe-style at 7.5W), the integrated kickstand held the phone at a useful angle, and 80 charge cycles produced no measurable capacity drop. It is not the fastest MagSafe battery, but it is the most pocketable that does the job reliably.
Frequently asked questions
Is the Anker MagGo 6.6K worth $79 in 2026?+
Yes for users who want one pocketable battery for one daily iPhone top-up. The 6,600 mAh capacity delivers exactly one full iPhone 16 charge with about 12% remaining in our testing. If you need to charge a laptop or multiple devices, step up to the [Anker 737 Power Bank](/reviews/anker-737-power-bank).
Why is it limited to 7.5W wireless?+
Apple caps third-party Qi-based MagSafe-style chargers at 7.5W. Only Apple's own MagSafe puck and MFi-certified hardware can deliver the full 15W. The MagGo 6.6K uses a Qi magnetic system that holds to the iPhone but charges at the third-party 7.5W ceiling.
Will the magnet hold the phone during a walk?+
On day one, yes. After 4 months of regular use, the magnet has weakened slightly, the phone occasionally slips when held vertically while walking. Still firm enough for desk use and seated charging in a coffee shop.
How fast does it recharge itself?+
USB-C PD at 20W input recharges the bank from 0% to 80% in 1 hour 32 minutes, and to 100% in 2 hours 18 minutes. We measured this with an inline USB-C power meter on a 30W Anker wall charger.
📅 Update log
- May 10, 2026Updated 4-month magnet-fatigue notes and re-verified capacity after 80 charge cycles.
- Jan 8, 2026Initial review published.
