---
product_id: 464158830
title: "Anker 621 Magnetic Battery"
brand: "anker"
price: "S$84"
currency: SGD
in_stock: null
reviews_count: 8
category: "Anker"
url: https://www.desertcart.sg/products/464158830-anker-621-magnetic-battery
store_origin: SG
region: Singapore
---

# 4.13 x 2.62 x 0.45 inches slim design 5000mAh compact power Ultra-strong magnetic attachment Anker 621 Magnetic Battery

**Brand:** anker
**Price:** S$84
**Availability:** ❌ Out of Stock

## Summary

> ⚡ Snap, Charge, Go — Power that sticks with you!

## Quick Answers

- **What is this?** Anker 621 Magnetic Battery by anker
- **How much does it cost?** S$84 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.sg](https://www.desertcart.sg/products/464158830-anker-621-magnetic-battery)

## Best For

- anker enthusiasts

## Why This Product

- Trusted anker brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Safe & Reliable:** Meets international safety standards with smart heat management for worry-free use.
- • **Fast USB-C Recharge:** Recharges fully in just 2.5 hours, keeping you powered up faster.
- • **Sleek & Lightweight:** At under 5 ounces, it’s the perfect minimalist companion for busy professionals.
- • **Pocket-Sized Powerhouse:** Fits effortlessly in your bag or pocket without weighing you down.
- • **Magnetic Snap-On Convenience:** Securely attaches to your iPhone 12-16 series for seamless wireless charging on the go.

## Overview

The Anker 621 Magnetic Portable Charger (MagGo) is a 5000mAh wireless power bank designed for iPhone 12 through 16 series. Featuring Anker’s MiniCell tech, it delivers full charging performance in a compact, lightweight form factor (4.13 x 2.62 x 0.45 inches, 4.96 oz). Its ultra-strong magnets ensure a secure snap-on connection, eliminating wireless charging misalignment. Equipped with a USB-C cable, it fully recharges in 2.5 hours and meets international safety standards despite moderate heat generation during use. Ideal for professionals seeking sleek, on-the-go power without the bulk or hassle of cables.

## Description

Buy 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: Portable Power Banks - desertcart.com ✓ FREE DELIVERY possible on eligible purchases

Review: Matches iPhone in lavender - The color matches the new iPhone 17 in lavender. The charging is ok, it makes the phone pretty warm and is only good for 1 full charge or several partial charges. It's small, light and works in a pinch which is why we have it.
Review: Compact, Portable, No Wires, Gets Hot! - This was my first Magsafe battery. I had some older Qi wireless chargers and was familiar with heating issues. But these were older and lower power. Without the Magsafe feature, they were finicky and fussy and didn't properly fit around camera lens protrusions. I barely used these devices. This Anker 621 has a lot of promise. The Magsafe feature locks tight and the dimensions do not interfere with the camera protrusions, even with a case on the phone. It's compact and slim, and most importantly, does not require wires. It can be easily carried in a backpack or pocket without an accessory bag for wires and cables. When I first unpacked the battery, I fully charged with with a USB-C PD charger. It charged at 1A/5V. I used it to inductively charge my iPhone 14 Pro intermittently over the next few days. After about 10% charge, I determined the heat buildup to be intolerable. Therefore, I only used the pack intermittently. That worked fine for me over several days. When the battery was empty, it took 20Wh to fully charge. The battery was advertised for 5000mAh, which is impossible to measure without disassembling the unit. However, we can calculate 20Wh / 5V / 0.9 = 4400mAh (where 0.9 is the efficiency of the voltage converter for USB). This is below advertised capacity, but there’s a lot of assumptions in the conversion. Then I used a USB-C cable to charge my iPad Mini. It transferred 14.8Wh at about 9 Watts before exhausting. The round-trip efficiency was high, because recharging took 14.8Wh to fully recharge. I suspect I didn’t get the full 20Wh capacity with the iPad because the higher charge demand choked the battery before it could get fully empty. Using the inductive charge mode, both devices get hot relatively quickly. The switching power electronics get particularly hot. I can easily feel where the transistor is located beneath the plastic shell. The inductive transmitter loop gets warm on the battery and the receiver loop gets warm on the phone. Lithium-ion batteries degrade proportionally to temperature (the Arrhenius relationship), accelerating +25% degradation rate for every 10C, this is bad for the phone. In summary, • The battery delivers 20Wh of energy. If using inductive (Qi and Magsafe), much of the energy is converted to heat, so perhaps only 10-15Wh is actually delivered to the battery. • If using high-current devices using a charge cable, such as an iPad, the high current chokes the battery a bit early, stopping at 15Wh. • My back-of-the-envelope calculation shows 4400mAh vs. rated 5000mAh. I suspect the battery is not delivering rated capacity. Anker should be rating these batteries in Joules (watt-hours) instead of Coulombs (ampere-hours). • Inductive charging is inefficient, losing a quarter to half of energy to heat. This is not Anker’s fault but a result of real-world physics. With my iPhone 14 Pro, I saw about 10C rise per 10% of battery charge. I never let it progress beyond this point. • Lithium-ion batteries accelerate aging degradation due to the Arrhenius relationship about +25% per 10C temperature rise. Therefore, prolonged use of inductive charging will ultimately age your battery prematurely. • This battery is very worthwhile because I don’t have to carry an accessory kit with wires to use. Just slap it on the back of the phone and go. Plus, if frees the connector to use with wired headsets when using.

## Features

- Smaller Than Ever: Anker's new MiniCell technology delivers identical charging performance with fewer components. This means it's smaller and lighter than ever before
- Pocket-Sized Power: At just 4.13 × 2.62 × 0.45" and 4.41 oz, it snaps to your phone and fits effortlessly into your bag, purse, or pocket
- Strong Attachment: Equipped with ultra-strong magnets that firmly attach to the back of the iPhone 15 or 14 so you can single-handedly take selfies, make calls, and more.
- Charge in a Snap: Align your iPhone and battery with a snap. Say goodbye to disconnection issues caused by wireless charging misalignment. （Note：It's normal for the power bank to reach temperatures between 98-118°F when the ambient temperature is 77°F. Rest assured, this device meets international safety standards for safe operation.）
- What You Get: Anker 621 Magnetic Battery (MagGo), 23.6 in (60 cm) USB-C to USB-C cable, welcome guide, worry-free 24-month warranty, and friendly customer service.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B099284SRR |
| Antenna Location | Outdoor |
| Battery Capacity | 5000 Milliamp Hours |
| Battery Cell Type | Lithium Polymer |
| Battery Charge Time | 2.5 Hours |
| Battery Weight | 76 Grams |
| Best Sellers Rank | #172 in Cell Phones & Accessories ( See Top 100 in Cell Phones & Accessories ) #13 in Cell Phone Portable Power Banks |
| Brand | Anker |
| Cable Length | 0.45 Inches |
| Color | Black |
| Compatible Devices | iPhone 16/15 Plus/15 Pro/15 Pro Max/14/14 pro/13 Series, iPad, |
| Compatible Phone Models | iPhone |
| Connector Type | USB Type C |
| Customer Reviews | 4.3 out of 5 stars 17,743 Reviews |
| Is Electric | No |
| Item Dimensions | 4.13 x 2.62 x 0.45 inches |
| Item Dimensions L x W x Thickness | 4.13"L x 2.62"W x 0.45"Th |
| Item Weight | 4.96 ounces |
| Manufacturer | Anker |
| Model Number | A1610 |
| Number of Batteries | 1 C batteries required. |
| Number of Ports | 1 |
| Other Special Features of the Product | Wireless Charging |
| Portable | No |
| Power Source | Battery |
| Reusability | Rechargeable |
| Special Feature | Wireless Charging |
| UPC | 194644086718 194644077624 |
| Unit Count | 1.0 Count |
| Voltage | 3.85 Volts |
| Warranty Description | 24-month warranty |
| Warranty Type | Limited |

## Product Details

- **Battery Capacity:** 5000 Milliamp Hours
- **Brand:** Anker
- **Color:** Black
- **Connector Type:** USB Type C
- **Special Feature:** Wireless Charging

## Images

![Anker 621 Magnetic Battery - Image 1](https://m.media-amazon.com/images/I/61BgnPuSS2L.jpg)

## Available Options

This product comes in different **Color, Size** options.

## Questions & Answers

**Q: Why is my power bank providing fewer charges than expected?**
A: The capacity reduction during charging is due to a 30% to 45% energy loss in the battery cells and conversion circuitry. Therefore, a fully charged Anker A1610 Battery (PowerCore 5K) offers an estimated 2,750mAh~3,250mAh to power devices.

**Q: How can I estimate the number of charges for my device?**
A: To estimate charging cycles, use these formula (Power Bank Capacity × 0.5) ÷ Device Battery Capacity ≈ Number of Charges. For instance, charging a 3,000mAh device using a 5,000mAh Wireless power bank would offer approximately 0.83 charges.

**Q: Why does charging stop at 80%?**
A: Your iPhone may automatically stop charging at 80% to protect its battery from overheating, as part of iOS 17's thermal management strategy. Charging will resume once the device cools down. Moving it to a cooler spot can help speed up this process.

**Q: Why is my phone overheating?**
A: It's normal for the power bank to reach temperatures between 98-118°F when the ambient temperature is 77°F. Rest assured, this device meets international safety standards for safe operation.

**Q: Why is wireless charging slower than wired charging?**
A: Wireless charging uses coil coupling technology, which is less efficient under the same power conditions. For faster charging, use a wired connection. To improve wireless charging speeds, minimize phone usage and close high-power apps while charging.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Matches iPhone in lavender
*by K***E on December 30, 2025*

The color matches the new iPhone 17 in lavender. The charging is ok, it makes the phone pretty warm and is only good for 1 full charge or several partial charges. It's small, light and works in a pinch which is why we have it.

### ⭐⭐⭐⭐⭐ Compact, Portable, No Wires, Gets Hot!
*by S***E on June 19, 2025*

This was my first Magsafe battery. I had some older Qi wireless chargers and was familiar with heating issues. But these were older and lower power. Without the Magsafe feature, they were finicky and fussy and didn't properly fit around camera lens protrusions. I barely used these devices. This Anker 621 has a lot of promise. The Magsafe feature locks tight and the dimensions do not interfere with the camera protrusions, even with a case on the phone. It's compact and slim, and most importantly, does not require wires. It can be easily carried in a backpack or pocket without an accessory bag for wires and cables. When I first unpacked the battery, I fully charged with with a USB-C PD charger. It charged at 1A/5V. I used it to inductively charge my iPhone 14 Pro intermittently over the next few days. After about 10% charge, I determined the heat buildup to be intolerable. Therefore, I only used the pack intermittently. That worked fine for me over several days. When the battery was empty, it took 20Wh to fully charge. The battery was advertised for 5000mAh, which is impossible to measure without disassembling the unit. However, we can calculate 20Wh / 5V / 0.9 = 4400mAh (where 0.9 is the efficiency of the voltage converter for USB). This is below advertised capacity, but there’s a lot of assumptions in the conversion. Then I used a USB-C cable to charge my iPad Mini. It transferred 14.8Wh at about 9 Watts before exhausting. The round-trip efficiency was high, because recharging took 14.8Wh to fully recharge. I suspect I didn’t get the full 20Wh capacity with the iPad because the higher charge demand choked the battery before it could get fully empty. Using the inductive charge mode, both devices get hot relatively quickly. The switching power electronics get particularly hot. I can easily feel where the transistor is located beneath the plastic shell. The inductive transmitter loop gets warm on the battery and the receiver loop gets warm on the phone. Lithium-ion batteries degrade proportionally to temperature (the Arrhenius relationship), accelerating +25% degradation rate for every 10C, this is bad for the phone. In summary, • The battery delivers 20Wh of energy. If using inductive (Qi and Magsafe), much of the energy is converted to heat, so perhaps only 10-15Wh is actually delivered to the battery. • If using high-current devices using a charge cable, such as an iPad, the high current chokes the battery a bit early, stopping at 15Wh. • My back-of-the-envelope calculation shows 4400mAh vs. rated 5000mAh. I suspect the battery is not delivering rated capacity. Anker should be rating these batteries in Joules (watt-hours) instead of Coulombs (ampere-hours). • Inductive charging is inefficient, losing a quarter to half of energy to heat. This is not Anker’s fault but a result of real-world physics. With my iPhone 14 Pro, I saw about 10C rise per 10% of battery charge. I never let it progress beyond this point. • Lithium-ion batteries accelerate aging degradation due to the Arrhenius relationship about +25% per 10C temperature rise. Therefore, prolonged use of inductive charging will ultimately age your battery prematurely. • This battery is very worthwhile because I don’t have to carry an accessory kit with wires to use. Just slap it on the back of the phone and go. Plus, if frees the connector to use with wired headsets when using.

### ⭐⭐⭐⭐⭐ Amazing product
*by I***A on January 18, 2026*

Durable I’ve had it for 2 years and it still works great, it’s portable, it kinda gets warm when in use.

## Frequently Bought Together

- 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
- Anker USB C to USB C Cable, Type-C 60W Fast Charging Cable (6FT, 2Pack) for iPhone 16 Series, iPad mini 6 and More (Black)

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---

*Product available on Desertcart Singapore*
*Store origin: SG*
*Last updated: 2026-02-05*