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0:00 Why do phones charge faster using a bundled charger?
0:40 Why did old mobiles took long to fully charge?
1:19 What does duration of charge depend on?
2:06 What processes happen in battery when charging and discharging?
3:28 Why do manufacturers use built-in batteries?
3:58 How is li-polymer different from li-ion?
5:00 What do amper-hours mean?
5:48 Why does the charger current rating does not affect actual charging current?
6:40 How to transfer energy needed for fast charging into the phone?
7:38 How did Qualcomm QC2.0 come about?
8:22 How to activate QC2.0 mode in a charging cable?
9:08 Observing the QC2.0 mode using a testing rig and a USB tester.
12:46 The QC2.0 and its ammendments. DCP protocol.
14:13 How to push 8A of current inside the phone via USB cable?
14:53 Nikola Tesla's Alternating Current System. High voltage power lines.
16:12 How does USB PD work in modern chargers?
17:36 Why does the charger increases voltage gradually?
18:36 Why does the phone behave differently with different chargers?
19:00 What is the data exchange process between the phone and the charger in USB PD mode?
19:50 Observing the Macbook charger operation using USB tester.
20:39 Measuring wall outlet power of Macbook charger in fast mode.
21:16 How is USB-A 3.0 different from USB Type-C?
21:45 Building a testing rig to observe operation of Macbook charger.
22:51 How safe is our rig? :)
23:37 Monitoring voltage and current of Macbook Type-C charger.
24:23 Observing Galaxy S8 charging process using our new rig.
25:13 The latest additions to USB PD protocol. Increasing charging power.
26:11 What else can USB PD offer?
26:39 Danger of using non-original USB Type-C chargers.
27:14 How does Direct Charge mode work?
28:25 Interactive USB cables.