The 45W PD Power Bank Was Released As Energear's First Power Bank Supporting USB Power Delivery
The 45W PD Power Bank by Energear uses USB Power Delivery 2.0 technology for fast charging over its single Type-C port. The USB Type-C port serves as both the output and input for sourcing/sinking power meaning it will charge any connected peripheral as well as getting power supplied by an external charger to charge the battery.
The Energear 45W PD Power Bank looks to be the first power bank sold by Energear supporting up to 45 watts using 5 volts @ 3 amps (15 watts), 9 volts @ 3 amps (27 watts), 12 volts @ 3 amps (36 watts), 15 volts @ 3 amps (45 watts) and 20 volts @ 2.25 amps (45 watts) power profiles over the USB Type-C interface. You can also charge the power bank using these power profiles as well.
You can use the Energear 45W PD Power Bank to quickly charge latest phones like the Apple iPhone XS Max or Android phones such as Google's Pixel 3 XL and the Samsung Galaxy S9+ over USB Power Delivery. The power bank should also sufficiently charge certain USB Type-C tablets and notebook PC's like Apple's 11-inch iPad Pro (2018) and MacBook 12" Retina 2017 or the Dell XPS 13 9370 and the Google Pixelbook.
Here's a closer view of how the Energear 45W PD Power Bank looks like from inside the box.
The USB-IF certification logo is not explicitly displayed on the packaging but shows up on the power bank's product page.
The nice thing about Energear products is that they mostly include a separate cable with the product itself, in this case a USB Type-C cable which should come in handy.
To set the Energear 45W PD Power Bank's USB Type-C port for charging out or to get charged by a USB Power Delivery based power source, you need to press the power button on the power bank. The LED's beside the power button will indicate how much charge is left.
The Energear 45W PD Power Bank also comes in black casing other than white as seen below.
We can see how the Energear 45W PD Power Bank supports power using the USB Power Test App from Granite River Labs with the Granite River Labs USB Power Delivery Compliance C2 Tester to generate the following test results.
The USB Power Test App first negotiates a power contract for every PDO supported by the Energear 45W PD Power Bank, and increases the load gradually to find the threshold where over current protection (OCP) kicks in and voltage and current start to drop for safety reasons. However, we do see more current instability after OCP triggers at 9V, 15V, and 20V PDO's.
The USB Power Test App reports out all the PDO's supported by the Energear power bank and their OCP thresholds.
|PDO#1 Fixed: 5V 3A|
|PDO#2 Fixed: 9V 3A|
|PDO#3 Fixed: 12V 3A|
|PDO#4 Fixed: 15V 3A|
|PDO#5 Fixed: 20V 2.2A|
The USB Power Test App from Granite River Labs takes this data to produce an I-V curve which graphically shows the relationship between voltage and current for each PDO. We can observe the current for 20V PDO just drops without reaching the 4.24A OCP threshold.
To determine the Power Delivery Sink capabilities of the Energear 45W PD Power Bank, the USB Power Test App first negotiates a power contract emulating the Source and then reports out the voltage and current supported by the power bank for each of the Source PDO's advertised to the power bank. Unfortunately the power bank had problems charging at 5V.
Using the USB Power Delivery Compliance C2 Tester from Granite River Labs to run just a subset of the full USB Power Delivery compliance test suite, some compliance failures were observed for the Energear 45W PD Power Bank even though it has been claimed to be USB-IF certified.
USB-IF High Level Mapping Summary
Test Group Description
BMC Physical Layer Transmitter
BMC Physical Layer Receiver
Protocol Specific Primary
TDA.188.8.131.52 BMC PHY TX EYE
TDA.184.108.40.206 BMC PHY TX BIT
TDA.220.127.116.11 BMC PHY RX INT REJ
TDA.18.104.22.168 BMC PHY RX BUSIDL
TDA.22.214.171.124 BMC PHY TERM
TDA.2.2.1 BMC PROT SEQ GETCAPS
TDA.126.96.36.199 BMC PROT SEQ CHKCAP P PC
TDA.188.8.131.52 BMC PROT SEQ CHKCAP NOMARK P PC
TDA.184.108.40.206 BMC PROT SEQ CHKCAP CP ACC
TDA.220.127.116.11 BMC PROT SEQ CHKCAP NOMRK CP ACC
TDA.2.2.7 BMC PROT BIST NOT 5V SRC
TDA.2.2.9 BMC PROT GSC REC
TDA.2.2.10 BMC PROT IGN PPS
TDA.18.104.22.168 POW SRC LOAD P PC
TDA.22.214.171.124 POW SRC LOAD CP ACC
TDA.126.96.36.199 POW SNK TRANS C CP
BMC Eye Diagram