OPPO Admits Its 40W Wireless Fast Charging Dramatically Reduces Battery Life
Karamchand Rameshwar - May 11, 2020
If you don't want to change your phones for less than three years, you should not purchase any smartphones that support OPPO’s 40W wireless charging tech.
- OPPO Reno 14 Series Hits India: Launch Date, Cameras, and Specs
- POCO X2 vs POCO F2 Pro: Reasons Why POCO X2 Is A Better Choice
- Samsung Galaxy M12 Debuts In India With 90Hz Display & 48MP Quad Cam
Last April, OPPO launched the Ace 2 smartphone, with Snapdragon 865 chipset, 90Hz screen, and an in-display fingerprint sensor for an attractive price of only $565 (around Rs. 42,800).

However, the most prominent feature of OPPO Ace 2 is the battery, with a capacity of 4,000 mAh that supports 65W fast wired charging and 40W wireless fast charging. Both fast charging technologies are impressive, but the 40W wireless fast charging technology is even more impressive because many smartphones today can still charge only 15W even when plugged in.
But it seems like users will have to trade many things when using OPPO's rapid wireless charging technology. The most significant thing is the battery capacity, which will be degraded much more rapidly compared to traditional charging technology.
Andrei F. of AnandTech revealed on his Twitter page: “OPPO confirms that its 40W fast charging technology will reduce the maximum capacity of the battery to 70%, in the same cycle that a conventional 15W charge does. reduce battery capacity to 90% ”.

That's why fast charging isn’t always good. That is also why major companies like Apple or Samsung are not jointing the competition of fast charging technology. While the iPhone only supports up to 18W fast charging, Samsung's flagship smartphone also only supports up to 25W charging.
However, nowadays, users tend to change their smartphones after 2-3 years. As a result, they may not realize the consequences of battery drain due to fast charging technology. OPPO might also believe that so that they are willing to accept the trade-off of battery capacity for faster-charging speed, bringing more utilities to users.
But if you are not a fan of changing for smartphones after less than three years, you should consider not going for the OPPO Ace 2 or any other smartphones that support OPPO’s 40W wireless charging technology.
>>> OPPO Launched Reno Ace 2 With 65W Fast Charging & Snapdragon 865
Featured Stories
Mobile - Mar 08, 2026
Transforming Android: New Desktop Mode Makes Phones PC-Capable
Mobile - Mar 07, 2026
Xiaomi Unveils Cutting-Edge 17 Series Smartphones and Teases Vision GT Hypercar
Mobile - Mar 06, 2026
Samsung Galaxy S26 Series Sets New Pre-Order Records: Ultra Model Captures 70...
ICT News - Feb 18, 2026
Google's Project Toscana: Elevating Pixel Face Unlock to Rival Apple's Face ID
Mobile - Feb 17, 2026
Anticipating the Samsung Galaxy S26 and S26+: Key Rumors and Specs
Mobile - Feb 16, 2026
Xiaomi Launches Affordable Tracker to Compete with Apple's AirTag
Mobile - Feb 14, 2026
Android 17 Beta 1 Now Available for Pixel Devices
Mobile - Feb 12, 2026
What is the Most Powerful Gaming Phone Currently?
Mobile - Feb 11, 2026
Top 5 Cheap and Efficient Gaming Phones in 2026
Mobile - Jan 31, 2026
Generalist vs Specialist: Why the Redmi Note Series Remains Xiaomi's Easiest...
Read more
Mobile- Mar 08, 2026
Transforming Android: New Desktop Mode Makes Phones PC-Capable
This update marks an exciting era for Android, empowering users to do more with their everyday devices.
Gadgets- Mar 08, 2026
Best Budget Keyboards of 2026
These budget keyboards prove that you don't need to spend hundreds for a quality typing experience in 2026.
Comments
Sort by Newest | Popular