With the arrival of mobile phones with connectors USB Type-C, it is not clear whether the chargers are compatible, if all of them can be used, or if a specific one is simply necessary USB Type-A to USB Type-C adapter. However, the app CheckR It is perfect to know if your charger is compatible.
USB Type-C
USB Type-C connectors are different from USB Type-A connectors, not only because they have a different design, but also because they have a electronic design different. Because of this, to use a conventional charger with a USB Type-A cable with a USB Type-C adapter, the latter must have modifications at the electronic level. And the big problem is that not all adapters have the precise design, so some might even damage our smartphoneHow do we know if our adapter is the right one?
In the adapters of Type-A to Type-C Properly designed cables include an identification resistor on the CC pin (typically 56 kΩ) to safely limit the current. For higher wattage cables and chargers, USB-C cables incorporate a e-marker chip that communicates capabilities (current, voltage, data, and video). Without these protections, a device may demand more current than the port allows, with risks of overheating and failures. To understand this, read Why does my phone charge slower? with some chargers.
Additionally, USB-C charging relies on USB Power Delivery (PD), which negotiates safe voltages and currents. Today there are SPR (up to 20 V) and EPR (up to 48 V) profiles that enable power outputs of up to 240 WIf the cable is not prepared (no e-marker or poor quality), it will force lower limits or may cause instability.
CheckR
CheckR is a very simple application that, although it has been designed especially for the Nexus 5X and the Nexus 6P, can be used with any smartphone with a USB Type-C connector. The app analyzes the adapter and check if it has the appropriate codes to identify the identification resistors and, where appropriate, the presence of e-marker. If not, then it would be best to replace the adapter for a different one.
Additionally, CheckR is useful for detecting "charge-only" cables that limit transfer speeds or don't support higher-voltage PD profiles. Always use it when you get a new one. cable or adapter to avoid surprises and confirm that power negotiation is carried out correctly.
Google Play – CheckR.
Charging and data cables: key differences
Although all USB-C cables look the same, there is a lot of complexity inside. electronicsThere are cables oriented to load and cables of data (which also charge). Standard charging ones usually support up to 60 W; above that value (100 W and 240 W) require e-marker. Remember: the effective power is always limited by the weakest element between charger, cable and device.
In data, the speed can be 5, 10, 20 or 40 Gbps depending on the supported version. Designations such as USB 3.2 Gen 1/2, USB4 and technologies such as Thunderbolt add complexity: a faster cable is often backward compatible, but a slower one will make you a bottleneck. For video, you need support for DisplayPort AltMode; Not all USB-C cables display an image, even if they charge and transfer files.
Are there many adapters that are not suitable?
But of course, one might think that adapters will generally be adequate, even though some may be of poor quality. In reality, this is not the case. It is claimed that the adapter itself OnePlus USB Type-C adapter is not suitable, it is an adapter which could therefore damage our smartphone. When we talk about smartphone battery charge, and we talk about electricity, we are also talking about one of the elements that is most likely to damage our smartphone. If it is damages the motherboard If we lose our smartphone, we are left without a mobile phone, because replacing it would be so expensive that it would be better to buy a new smartphone. So, if you have a USB Type-C, it would be better for you to buy a quality adapter, or even just use a charger that supports USB Type-C out of the box.
Beyond specific brands, the real problem is the products that do not meet the specification: adapters that omit DC resistance, cables without e-markers that are advertised as 100/240 W, or “data” cables limited to 480 Mbps. These faults are not always visible to the naked eye; that is why it is a good idea to verify certifications and test them with diagnostic apps.
How to choose a safe USB-C cable and charger
- Check powersIf your laptop supports 65/100/140/240W, the cable should indicate this and have an e-marker for >60W. For mobile devices, a well-built 60W cable is usually sufficient.
- Look for certification: logos and references of USB-IF on packaging and tab. Be wary of vague claims like “super fast” without any specific details. W o Gbps.
- Data and video: If you need fast transfers or to connect a monitor, require USB 3.2/USB4 and compatibility DisplayPort AltModeFor docks, prioritize full, short cables.
- Test and monitor: uses CheckR and monitor the temperature during extended charging. Overheating cables or heads are a bad sign.
Choosing well not only improves the loading rate and data: it also protects your battery and electronics. With a certified cable, a reliable PD charger, and CheckR testing, you'll have a safe, fast, and compatible experience with most current USB-C devices, from phones to laptops and monitors.
