Since battery technology is having an extremely difficult time catching up with the rest of mobile developments, phone makers have resorted to working on battery charging technologies instead. OPPO has one of the most outrageous numbers and speeds in that department, at least as far as commercially available phones go, and it dipped its toes into the wireless charging arena last month with the launch of the OPPO Ace 2. Unfortunately, not even OPPO can escape the laws of physics and it might have bitten off more than it could chew.
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https://www.slashgear.com/oppo-ace-2-40w-fast-wireless-charging-may-come-at-a-terrible-price-11619963/