Dash Charge is one of the best fast charging protocols available today.
OnePlus rolled out Dash Charge in the OnePlus 3 and 3T, and while this year's OnePlus 5 and OnePlus 5T featured a new wall charger, the underlying tech has remained intact. Dash Charge allows the OnePlus 5T to attain a 60% charge in just 30 minutes, and while there are other fast charging solutions that let you top up your battery quickly, the advantage with OnePlus' tech is that it doesn't overheat your phone.
Dash Charge is licensed from OPPO, the parent company of OnePlus, and is different from the majority of quick charging options available today, most of which are based on Qualcomm's Quick Charge technology.
Here's what you need to know about Dash Charge on the OnePlus 5T.
A primer on fast charging
A standard smartphone battery is highly reactive, which is why phone manufacturers have several safeguards built into the charging circuitry. Based on the depletion level, batteries can take in more power, and it is on this principle that fast charging works.
Qualcomm's Quick Charge technology relies on delivering a higher voltage to the battery to expedite charging time. Quick Charge 4.0 is fully compliant with the USB-C Power Delivery (PD) spec, and is 20% faster and up to 30% more efficient than Quick Charge 3.0. Qualcomm has introduced a new power management algorithm called Intelligent Negotiation for Optimum Voltage (INOV) to ensure better temperature regulation, along with safeguards to protect against overheating and overcharging.
Qualcomm claims that with its parallel charging technology, you'll be able to use your phone for five hours with just a five-minute charge. The chip vendor licenses the technology to third-party OEMs, which is how companies like Samsung can offer Adaptive Fast Charging on the likes of the Galaxy Note 8. In Samsung's case, the company is still using Quick Charge 2.0, and although we're yet to see phones with Quick Charge 4.0 on the market, a majority of flagships today — like the HTC U11 and LG G6 — offer Quick Charge 3.0.
Qualcomm uses high voltages, whereas OPPO pushes more amperage.
Meanwhile, OPPO has its own fast charging solution called VOOC (Voltage Open Loop Multi-step Constant-Current Charging). The fast charging system is used in the F3 Plus, R9s, R11, and other OPPO phones, and on OnePlus devices as Dash Charge. OPPO uses dedicated circuitry in the charger itself for heat management and dissipation, which is why you can only get Dash Charge speeds with OnePlus-branded wall and car chargers — such as the one that's included in the OnePlus 5T's box.
The key difference between the two fast charging technologies is that while Qualcomm uses higher voltages to charge batteries, VOOC relies on delivering a higher amperage. For instance, Quick Charge 3.0 goes up to 6.5V at 3A, creating 19.5W, whereas VOOC delivers 5V at 4A to attain 20W. And that has a few advantages.
It's all cool
One of the main benefits of Dash Charge (and VOOC) is its ability to keep temperatures low while charging. The fast charging option allows you to watch videos or play games while the phone is charging, with no net drop in charging speeds. That isn't the case with Quick Charge, as the higher voltages invariably lead to the phone reverting to normal speeds to prevent overheating.
With Dash Charge, you can play games or watch videos while charging your phone without worrying about overheating.
Furthermore, even though the OnePlus 5T can charge up to 60% in 35 minutes, it takes slightly over 45 minutes to go from 60% to a full charge. That's to prevent damage to the battery (and in a way, to you), with the wall charger limiting output at 2A after hitting 75% and going even lower after reaching 85%. The microcontroller unit inside the phone constantly monitors the charge level to determine the desired amperage to be delivered.
The main disadvantage with Dash Charge is that you need to use OnePlus-branded chargers (it sells both a wall and car charger) to get the higher speeds on the OnePlus 5T, as OPPO is yet to license the technology to third-party vendors. You can use other chargers on the OnePlus 5T, and use the Dash Charge charger for other devices, but in both cases they will fall back to the lower common denominator of standard charging speeds.
Your thoughts
What do you think of Dash Charge on the OnePlus 5T? Let us know in the comments!
Updated in November 2017 with information specific to the OnePlus 5T.
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