Car Chargers for Rideshare Drivers: Watts, PD, Qi2 and Safety

In 2016 I reviewed a two-port car charger rated at 4.8 amps, or 24 watts in total, and wrote that a charger in the car was one of the best things I could do for passengers. I said I had received a lot of tips just because I had a charger available. I removed that review because the product is old and phone charging has changed. The idea that a dead phone is a rider’s worst problem still holds, and now your own phone needs a good charger too.

What 4.8A / 24W actually meant

That charger put out 5 volts, and 4.8 amps across two ports is 24 watts. Each port could deliver about 2.4 amps, or 12 watts, if both were in use. That was fast in 2016. Today, Apple says the iPhone 17, 17 Pro and 17 Pro Max reach 50 percent in about 20 minutes with a 40-watt or stronger adapter. The iPhone 17e and iPhone Air need 20 watts or more to hit 50 percent in about 30 minutes. A 12-watt port is slow for either.

What changed since 2016

• USB-C Power Delivery (PD). The charger and phone negotiate the voltage. Standard PD runs at 5, 9, 15 and 20 volts and up to 100 watts. USB-A ports on car chargers are often limited to lower power. One current Anker model I read about caps its USB-A port at 22.5 watts.
• PPS (Programmable Power Supply). An extension of PD that lets the charger adjust voltage and current in small steps. Samsung says Super Fast Charging requires a charger that supports USB PD with PPS, so a charger with a high watt rating but no PPS may not give your Galaxy phone its top speed.
• GaN. Gallium nitride lets a charger deliver a given wattage in a smaller body. It is a size advantage, not a speed guarantee.
• Wireless: Qi2 and MagSafe. Apple lists up to 25 watts for MagSafe and Qi2 charging on the iPhone 17, and says it needs an adapter of 30 watts or more. Magnetic mounts that charge are now common.
• Higher per-port wattage. A single port of 30 watts or more is normal. Samsung’s phones range from 25 watts on the regular Galaxy S26 to 45 on the S26 Plus and 60 on the S26 Ultra, according to Android Authority. Check the spec page for your phone.

How many watts you actually need

Look up your phone’s maximum wired charging speed on the manufacturer’s spec page. Then plan like this:

Use	Roughly what to look for
Your phone, running navigation and a hotspot	At least what the phone accepts. 30 watts per port covers most phones, and 45 watts or more helps phones that can use it.
A passenger-facing port	12 to 20 watts is enough to top off a phone.
Two phones at once	Check per-port numbers when both ports are in use.

The total on the box is often not what each port gets. Android Authority gives an example where a charger that can reach 40 watts on one port drops to 12 watts on the others when three devices are connected. If you want to charge your phone fast while a rider charges theirs, buy a charger that lists wattage per port with both in use.

Cables

The cable limits the charger. USB-IF cable logos mark 60-watt and 240-watt ratings, and cables that carry more than 60 watts have an embedded chip that tells the devices what they can handle. A basic 60-watt cable may carry only USB 2 data, which does not matter for charging. A cable that gets bent and tugged for ten hours a day wears out, so replace one that frays or starts charging intermittently, and keep a spare. A modern PD charger usually needs a USB-C to USB-C cable (or USB-C to Lightning for older iPhones), so check what your phone takes.

Heat, navigation and a hotspot

Running navigation with the screen on and a hotspot for hours is among the harshest loads a phone sees, and the car is hot. Apple says iPhone charging slows or stops when the phone gets too hot, including with wireless chargers, and that parked cars can exceed the phone’s operating range of 32 to 95 degrees Fahrenheit. It suggests removing the case if the phone heats up while charging.

Wireless charging adds heat because the energy lost in the transfer becomes heat, according to Android Authority’s Qi2 explainer. In its testing, a Qi2 charger with a cooling fan kept one phone about 6 to 8 degrees Fahrenheit cooler than without the fan, and the Pixel 10 throttled its wireless charging quickly. Android Authority also notes a reader’s report that, in a hot car, wireless charging could not keep up with navigation. That is one reader’s experience and not a test. My takeaway is that for long shifts a wired PD connection is the more dependable option, and a vent mount that puts the phone in the airflow helps with heat. For a vent mount, see my magnet vent mount post.

Avoiding counterfeit and cheap chargers

A charger that overheats in your car can ruin a phone or start a fire, and counterfeits are common. A printed logo proves nothing, because fakes print them. Here is what to check:

• USB-IF certification. The USB Implementers Forum says that to confirm a product is certified, check the USB-IF Integrators List at usb.org, because uncertified products do display the logo. A listed product has passed the USB-IF compliance tests.
• UL listing. Look for a UL file number (usually starting with E) in the fine print and look it up in UL’s online directory. It should match the brand name. This advice comes from retailer and tutorial sites, not UL, so confirm it on UL’s site.
• Price. A charger priced far under its name-brand equivalent should make you suspicious.
• Report fakes. If you think you have a counterfeit or dangerous charger, you can report it to the Consumer Product Safety Commission.

I am not naming a specific charger. I could not verify a current best car charger from a testing site, and the car-charger guides I found were several years old. Look for PD with PPS, per-port wattage that fits your phone, and USB-IF or UL verification.

What your car’s 12V socket can handle

A 12V socket is on a fused circuit, commonly 10 or 15 amps. At 12 volts, 10 amps is 120 watts and 15 amps is 180 watts on paper. The real limit is in your owner’s manual and it can be lower. One Kia owner’s manual I found says accessories should draw under 10 amps, and another Kia manual says under 15. Tesla’s Model S and X manuals give 11 amps continuous (15 peak), or 150 watts continuous (180 peak), and the Model 3 manual gives 12 amps continuous (16 peak). Do not swap in a bigger fuse.

If you run a dash cam, a charger, and maybe an inverter off the same circuit, add the draws up. A 65-watt charger is fine on most circuits by itself. Several high-wattage devices on one circuit can blow the fuse.

EV quirks

In an EV the 12V socket and USB ports may behave differently when the car is off. Tesla’s update 2024.32 turned off the 12V sockets and USB ports when the car went to sleep in Sentry Mode, and owners reported a later update with an Accessory Power setting to turn them back on. Those reports come from owner forums and news sites, so check your own car’s settings and manual. If you hardwire a dash cam for parking mode in an EV, confirm what stays powered.

Bottom line

Look for a USB-C PD charger, ideally with PPS, whose per-port wattage fits your phone, from a company that lists its certification. Pair it with a good cable, keep your phone out of direct sun, and treat wireless as a convenience, not the main way you charge on a long shift.

Car chargers reviewers recommend

If you want a place to start, these two cover the main cases: a Qi2 magnetic charging mount and a high-wattage dual-output charger. The full list of chargers and cables has more.