Introduction

The iPad Pro 11-inch (M4) is Apple’s latest attempt at redefining what a tablet can do. With a stunning Ultra Retina XDR display, powered by dual-layer OLED technology, it delivers exceptional contrast, brightness, and ProMotion adaptive refresh rates (10-120Hz). Under the hood, the M4 chip brings unparalleled speed and efficiency, offering up to 10-core CPU and GPU with 16GB of RAM for seamless multitasking and pro-level workflows. Next, let's test its charging performance. 

Product Appearance

As Thin As 5.1 mm | Charging Review of iPad Pro 11-inch (M4)-Chargerlab

The packaging is in Apple's usual style, with a picture of the tablet printed on the front.

As Thin As 5.1 mm | Charging Review of iPad Pro 11-inch (M4)-Chargerlab

The box contains the iPad Pro 11-inch (M4), a 20W USB-C charger, a dual USB-C cable, and some documents.

As Thin As 5.1 mm | Charging Review of iPad Pro 11-inch (M4)-Chargerlab

The iPad Pro 11-inch (M4) Ultra Retina XDR display features dual-layer tandem OLED technology, delivering 1000 nits of full-screen brightness and 1600 nits of peak HDR brightness. It supports ProMotion adaptive refresh rate (automatically adjusting between 10-120Hz) and True Tone display, ensuring an exceptional visual experience.

As Thin As 5.1 mm | Charging Review of iPad Pro 11-inch (M4)-Chargerlab

It is only 5.1mm thick, making it incredibly slim, with excellent weight control. Available in Space Black and Silver, it offers a sleek and premium look.

As Thin As 5.1 mm | Charging Review of iPad Pro 11-inch (M4)-Chargerlab

The bottom of the back panel is marked with the product model: A2836, with a magnetic connector below it. It supports not only the Magic Keyboard but also the Apple Pencil Pro and Apple Pencil (USB-C).

As Thin As 5.1 mm | Charging Review of iPad Pro 11-inch (M4)-Chargerlab

It has a 12 MP wide camera with adaptive True Tone flash, landscape 12MP Center Stage camera, and studie-quality mics.

As Thin As 5.1 mm | Charging Review of iPad Pro 11-inch (M4)-Chargerlab

The volume buttons, Apple Pencil magnetic port, and microphone are on the right.

As Thin As 5.1 mm | Charging Review of iPad Pro 11-inch (M4)-Chargerlab

The Thunderbolt / USB 4 port allows for seamless connectivity, supporting external displays of up to 6K resolution, storage devices, and data transfer speeds of up to 40Gb/s. Additionally, it offers ultra-fast Wi-Fi and 5G support. The quad-speaker system enhances the experience with immersive audio quality.

As Thin As 5.1 mm | Charging Review of iPad Pro 11-inch (M4)-Chargerlab

There are no physical buttons on the left.

As Thin As 5.1 mm | Charging Review of iPad Pro 11-inch (M4)-Chargerlab

There is a power button, speaker, and microphone on the top.

As Thin As 5.1 mm | Charging Review of iPad Pro 11-inch (M4)-Chargerlab

The length of the iPad Pro 11-inch (M4) is about 24.3 cm (9.57 inches).

As Thin As 5.1 mm | Charging Review of iPad Pro 11-inch (M4)-Chargerlab

The width is about 17.77 cm (7 inches).

As Thin As 5.1 mm | Charging Review of iPad Pro 11-inch (M4)-Chargerlab

The thickness is about 5.14 mm (0.2 inches). 

As Thin As 5.1 mm | Charging Review of iPad Pro 11-inch (M4)-Chargerlab

The weight is about 444.0 g (15.66 oz).

As Thin As 5.1 mm | Charging Review of iPad Pro 11-inch (M4)-Chargerlab

The model of the included 20W charger is A2244. It can support input of 100-240V~ 50-60Hz 0.5A. It can support the output of 5V3A and 9V2.22A.

As Thin As 5.1 mm | Charging Review of iPad Pro 11-inch (M4)-Chargerlab

ChargerLAB POWER-Z KM003C shows it supports PD2.0 and DCP charging protocols.

As Thin As 5.1 mm | Charging Review of iPad Pro 11-inch (M4)-Chargerlab

The dual USB-C cable adopts a woven design.

As Thin As 5.1 mm | Charging Review of iPad Pro 11-inch (M4)-Chargerlab

ChargerLAB POWER-Z KM003C shows it doesn't have an E-marker chip.

Compatibility Test

Next, let's do the charging compatibility test.

Original Chargers

As Thin As 5.1 mm | Charging Review of iPad Pro 11-inch (M4)-Chargerlab

Charge with the Apple 20W charger, the power is about 8.63V 2.12A 18.28W.

As Thin As 5.1 mm | Charging Review of iPad Pro 11-inch (M4)-Chargerlab

Charge with the Apple 61W charger, the power is about 14.71V 2.2A 33.27W.

As Thin As 5.1 mm | Charging Review of iPad Pro 11-inch (M4)-Chargerlab

We tested Apple chargers one by one, all paired with the original 3A dual USB-C cable. The compatibility is excellent.

As Thin As 5.1 mm | Charging Review of iPad Pro 11-inch (M4)-Chargerlab

We summarize the test results into a bar chart. All tested chargers can reach the power limit of the charger itself or the power limit of the tablet, with a maximum charging power of 33.27W.

Third-party Chargers

We also used a variety of third-party chargers with the original cable during the test. Let’s take a look at the results.

As Thin As 5.1 mm | Charging Review of iPad Pro 11-inch (M4)-Chargerlab

There are no compatibility issues. Most third-party chargers can reach a voltage of around 15V, and a few are 12V and 5V.

As Thin As 5.1 mm | Charging Review of iPad Pro 11-inch (M4)-Chargerlab

We summarize the test results into a bar chart. Third-party chargers can reach the maximum charging power supported by the charger or tablet, and the overall compatibility performance is excellent.

Third-party Power Banks

We also used a variety of third-party power banks with the original cable during the test. Let’s take a look at the results.

As Thin As 5.1 mm | Charging Review of iPad Pro 11-inch (M4)-Chargerlab

There are no compatibility issues. Most power banks can reach a voltage of about 14V, and a few can reach a voltage of 9V.

As Thin As 5.1 mm | Charging Review of iPad Pro 11-inch (M4)-Chargerlab

According to the bar chart, the test results are consistent with those of third-party chargers, and the overall compatibility performance is also excellent.

Full Charging Test

The iPad Pro 11-inch (M4) has a built-in 31.29Wh battery with up to 10 hours of battery life. It is equipped with a Thunderbolt/USB4 port and a 20W USB-C power adapter is included in the package.

As Thin As 5.1 mm | Charging Review of iPad Pro 11-inch (M4)-Chargerlab

Charge with the Apple 70W charger, the power is about 14.65V 2.23A 32.63W.

Next, we'll use the Apple 70W charger to fully charge the iPad Pro 11-inch (M4). And put them into a 25°C (77℉) thermotank throughout the test.

As Thin As 5.1 mm | Charging Review of iPad Pro 11-inch (M4)-Chargerlab

The voltage is always around 15V. The charging curve can be divided into five parts. When the power is just turned on, the peak power reaches 35W for the first 16 seconds. And the power stays at 34W until 40 minutes. Then, the power gradually drops to 24W and 18W in turn. The final part begins at 1 hour and 23 minutes, the power slowly drops to almost zero. It takes 2 hours and 9 minutes to be fully charged.

As Thin As 5.1 mm | Charging Review of iPad Pro 11-inch (M4)-Chargerlab

We also turn it into another curve. The Apple 70W charger can charge the iPad Pro 11-inch (M4) to 50% in 37 minutes. And it can reach 80% in 1 hour and 11 minutes, 100% in 2 hours and 9 minutes.

Summary of ChargerLAB

The iPad Pro 11-inch (M4) continues Apple’s signature minimalist design, featuring a sleek, squared-off look with smooth, flowing lines. At just 5.1mm thick, it is impressively slim. The Ultra Retina XDR display utilizes dual-layer tandem OLED technology and supports ProMotion adaptive refresh rates (10-120Hz), delivering stunning visuals. Powered by the Apple M4 chip, the device ensures buttery-smooth performance for everyday tasks. With excellent weight distribution, it remains comfortable for extended handheld use, whether you're watching movies, reading, or carrying it in a bag—offering portability without compromise.

It is equipped with a 31.29Wh battery and a 20W charger, but after testing, the charging power can reach 35W. It has excellent compatibility with original chargers. As for third-party chargers and power banks, the tablet is also very compatible and can reach the highest power supported by the charger or tablet. It can reach 50% in 37 minutes, 100% in 2 hours and 9 minutes with the Apple 70W charger.

The iPad Pro 11-inch (M4) stands out in the tablet market with its ultra-thin and portable design, powerful M4 chip, stunning display, rich software ecosystem, and seamless compatibility with the Apple Pencil Pro and Magic Keyboard. It excels as both an entertainment and learning device and a productivity powerhouse for professionals. However, battery life and thermal management leave room for improvement in future iterations. Overall, if you seek top-tier performance, an exceptional display, and a robust creative experience—and are less sensitive to price—the iPad Pro 11-inch (M4) is a premium tablet well worth considering.

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2. Charging Compatibility Test of Apple iPad Pro M4
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