Posted on 08/26/2015 3:54:21 AM PDT by Swordmaker
An analysis of smartphone charging times comparing the Apple iPhone 6, Samsung Galaxy S6, LG G4, Motorola Droid Turbo, Google Nexus 6, Asus Zenfone 2, and HTC OnePlus 2 has been published by Tom's Guide.
Here's how the tests were performed:
To test each handset, we ran it down until it was powered off. Then, we charged each device back up to 5 percent. This put all of the phones on an even playing field, as some don't power down until the battery is completely dead and others cut out when there's still 3 percent or more battery remaining. Once each phone had reached 5-percent battery life, we plugged them in and started the clock. We then noted the charge of the battery at 5 minutes, 15 minutes and 30 minutes. Finally, we noted how long it took to charge the battery, first to 80 percent and then to 100 percent.
The Asus Zenfone 2 led the pack initially charging to 17% in 5 minutes, 32% in 15 minutes, and 53% in 30 minutes. Compare that to the iPhone at 6% in 5 minutes, 20% in 15 minutes, and 36% in 30 minutes.
Examining the time it takes to reach 80% and 100%, the Galaxy S6 comes out on top reaching 80% in 48 minutes and 100% charge in 1 hour and 22 minutes. The iPhone 6 comes in at the bottom of pack taking 1 hour and 15 minutes to reach 80% and a lengthy 2 hours and 35 minutes to reach 100%.
Considering that each phone has a different size battery, the site also calculated milliamps per minute to determine the fastest charging device.
The Zenfone 2 fared the best at the 15-minute mark, with a score of 64 milliamps per minute, and second place went to the Droid Turbo, with a score of 57.2. The Zenfone 2 also won at the 30 minute mark charging at 53 milliamps per minute followed by the Droid Turbo at 49.4. In the race to 100%, the Droid Turbo comes out on top charging at 36.45 milliamps per minute, while the LG G4 (31.25) and Galaxy S6 (31.1) came in second and third.
Check out a couple charts below or hit the link for the full report.
They perhaps meant to multiply with time which would yield the accumulated charge (in Coulombs).
Well smarty pants, I close all my apps every day and can do the same thing. So...
I use my phone all day
Charged for 30 minutes while listening to an audiobook and running Waze on the way into work.
My battery meter says I still have 49% & 17 hours to go.
It would follow, then, that the maximum temperature would come from the maximum current - and thus, for a given amount of charge of a given duration of time, the minimum temperature would be attained by minimizing the maximum rate of charging - by making it equal to the minimum rate. IOW, constant charge rate.For Lithium batteries, a constant current is required, so the applied voltage will change as the battery charges to maintain a constant current
Everything is clear. The voltage listed is not what appears at the terminals - the voltage applied to the terminals is whatever it takes to produce the nominal current.A current source, rather than a voltage source.
Get the right charger. I bought this and the phone and tablet charge quickly. Faster then the provided charger.
Mopower 36 Watt 7.2A Portable 4 Ports
http://www.amazon.com/Charger-Mopower-Portable-Adapter-Technology/dp/B00V4JI7G0/ref=pd_bxgy_147_img_z
A couple of thoughts...
Modern battery technology still has some “issues” - one of which is you must make a choice - battery life (long-term) or convenience when it comes to charging. Regardless of the software behind charing (Apple makes a big deal out of their regulation of charging), the higher the amperage you charge at (aka - faster charge), the shorter life that battery will have. The long-standing rule of battery charging (regardless of battery type), is that a slow charge is better for it. Deep cycling of the battery on a regular basis is also hard on it.
So - while the convenience of a fast charge might be appealing, realize that it comes at a price - and that is the physical battery will need to be replaced sooner (and the overall life per-charge will also diminish quicker).
Now - with a lot of consumers, they don’t keep a device long enough for this to be a major problem.
Yep - I left that factor out of my post...
What are the rated capacities of the batteries in these devices? I would definitely be interested in seeing if that correlates with the charging times at all...
Look for any documentation you might have received when you bought it - If you bought the warranty under the claim of $100 replacement/repair, then they cannot arbitrarily change that deductible to $150...
Also - and I cannot speak to Android devices on this matter - but an iPhone reaches “100%”, it actually is NOT 100% charged. Indeed, for the last couple of % and beyond the indicated 100%, the battery continues to “trickle charge” up to the maximum capacity of the battery (which decreases with every charge).
I am looking to buy out my contract and charging duration is my number 1 beef with all cell phones. I am thinking the S5 must be just behind the S6? Will likely get the S6 - just that the S5 is quite a bit cheaper. I’m Canadian so we have the least competitive phone market in the Western world, meaning plans here are an outrage.
I’m constantly running out of charge on my phone and like to use it on the bus to and from work, so it’s a big deal to me.
There is a direct correlation between charging rate, and battery temperature. The faster the phone charges, the hotter the battery gets.
There is a direct correlation between battery temperature and battery life. The hotter a battery gets, the shorter it’s expected life expectancy will be.
So, what would you rather have, a phone that charges slower - but with a battery that dependably lasts more than a year or two; or a phone that charges very fast but with a battery life that is just not that great?
I’ll wait for the slower charging, but more dependable battery.
Disclaimer: Opinions posted on Free Republic are those of the individual posters and do not necessarily represent the opinion of Free Republic or its management. All materials posted herein are protected by copyright law and the exemption for fair use of copyrighted works.