Wall Charger Lab
Introduction
We have all been there -- you have bought a new charger and it feels like the charger is broken or your phone is broken... while the phone charges, it takes forever to charge.
This is because while most USB chargers use 5 volts, the amount of amps they put out is drastically different. While the voltage tells us how fast the energy is pushed, the amps tell us how much energy is pushed. Thus, we know that the more amps a charger has, the faster the phone will charge.
Lets look at a couple of examples:
Apple A1385 Travel USB 5V Wall Charger
This charger, made by Apple and sold for $9.00 boasts a fast charging speed! This charger uses 5 volts and 2.1 amps.
Xuma 2.4A USB Charger with Folding Prongs
This charger, is made by an offbrand and sells for $8.99. This charger uses 5 volts and 2.4 amps.
From this, we can see that this off-brand, while not an Apple product, is less money while providing 14% faster charging.
Galaxy S7 Adaptive Fast Charging Wall Charger
This charger, is made by an Samsung and sells for $8.99. This charger uses 5 volts and 2.1 amps.
From this, we can see that this Samsung charger says it is "fast charging" while charging 14% slower than the off-brand product
Lab Instructions:
Today, you will be using the internet to research five (5) separate wall chargers. You may use any internet website you want -- personally, I use Amazon, but if you like another site, feel free to use it.
Some of these chargers will have multiple ports -- remember, unless it specifically mentions it, these chargers will all use the same amps; e.g. if the charger is 2.4 amps and has two ports, then each port is 1.2 amps. Note: some chargers are specifically designed to accommodate multiple ports.
You will do research for five (5) wall chargers and document the following:
Name of Product
Picture
take a partial screen shot so we can see the item
Cost
If the item is sold in a pack, you will need to divide the cost by the amount of products.
Style
Is it a single port? Dual port? Multiple port?
Amps:
How many amps does the product use?
Amps per port:
If there are multiple ports, then unless the product specifically says the amount of amps per port, you need to assume that all the ports share the same amps... so divide the total amount of amps by the amount of ports.
Cost per amp:
Divide the cost of the product by the amount of amps per port
When everything is done, you will add them all to a slide and create a slideshow. It should look like this:
