Charging the iPhone 12 Pro with the Anker PowerCore Fusion 10000 and the Zendure X5 USB-C PD
Started with the phone reporting 23% battery charge (the phone is about a year old and iOS reports the battery has degraded to 85% of its original capacity). The phone was kept on but unused, screen off, all radios (cellular, WiFi, Bluetooth) hot.
The Anker charged the iPhone at about 18W (~9V ~2A) and after about 50 minutes, the phone is reporting 88% charge, charging has slowed to 5W (5V 1A) if not lower (I’m often seeing, e.g., 5.08V at 0.55A, about 2.8W), and 6 of the 8 “charge status” lights on the Anker remain illuminated.
I can definitely live with those numbers.
It took about another hour, and one more “dot” on the Anker, to bring the phone all the way up to 100% charge reported. The Klein logged 1343 mAh, and 9.925 Wh, of power transmission.
The stock iPhone 12 Pro battery is a 10.78 Wh unit, probably closer to 9.2 Wh now. If 9.928 Wh brought it up 77%, 7.1 Wh, that’s about 72% efficient which, for a fast charging system, ain’t half bad. If the Anker is a 35.2Wh device (9700mAh at 3.63V), this “10000 mAh” device should charge the iPhone 12 Pro fully (well, fully as degraded to 85% original capacity) about 2.7 times. Given five out of eight dots remaining lit, that seems to be roughly the case.
Update: I took the Zendure X5 to the Disneyland Resort for a full day (~9 a.m. – ~10 p.m.) of park hopping, using the Anker cable to top off my iPhone twice during the day, once at lunch, and again at dinner. I didn’t time it exactly, but in both instances the phone went from ~35% to fully charged within an hour. I’m now completely a believer. Looking at USB-C chargers for the car (want something with pass-through for a radar detector and fridge, and other USB power for a dash cam, etc).
Update 2: I’ve done a quick instrumented charge with the ET920. At 53% the iPhone draws 9V at about 1.35A (roughly 12W). When the phone hit 80% (after about 21 minutes, 438 mAh, 3.77 Wh) it drops to 5V fluctuating between 1.1-1.5A (max about 7.5W). So the Anker charges the phone faster, but if I’m only carrying one device, it’d be the Zendure, which has a larger capacity and can charge a MacBook Air. Another ~20 minutes it’s up another 10% (to 90%). Finally, after about 1 hour 15 minutes (935 mAh, 6.30 Wh), the phone is showing 98% and the power delivery has dropped to a trickle; 4/4 dots on the X5 lit, showing it’s still carrying a “full” charge.
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