Customer Review

1,683 of 1,776 people found the following review helpful
5.0 out of 5 stars Generic USB charger, USB cable not included, September 28, 2011
This review is from: Amazon 5W USB Charger (also compatible with other android and iOS devices) (Accessory)
This exact power adapter came standard with what Amazon calls now the 'Kindle Keyboard' models (Kindle 3) but NOT with the Kindle Touch and the least expensive model ($69 no touch) now known as plain 'Kindle'. It should NOT be used with any of the Kindle Fire models. It can be used just about anywhere in the world (100-240V) for as long as you have the proper plug adapter.

To charge a Kindle you will need a generic USB Type A/Micro B cable and one is supplied with every Kindle purchased and you can do it in several different ways:

- Off a laptop or PC through one of their 'powered' USB ports (you will need a laptop or a PC)
- With this adapter which comes with all Kindle 3s or can be purchased separately (you will need the Amazon-supplied or any generic USB cable)
- With a third-party, branded or generic USB charger (search Amazon for either 'kindle charger' or 'usb charger')

This specific charger works for all 3d and 4th generation Kindles and is also great for charging lots of other gadgets that get charged through an USB port. I'm using it to charge my Blackberry Torch, a couple of other phones and the kids charge their MP3 players. And the reverse is also true: most other USB chargers will work with your Kindle. One good example is the Blackberry's.

Amazon's charger may cost a couple of dollars more than a generic but it comes with Amazon's logo and some peace of mind. For anyone going 'generic', here are the Amazon adapter's specs:

INPUT (AC): 100-240V, 50/60Hz
OUTPUT (DC): 4.9V, 0.85A

Prices fluctuate so I'm not going to discuss 'price' but it's always a good idea to search Amazon for alternatives before placing an order.
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Comments

Tracked by 10 customers

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Showing 1-10 of 74 posts in this discussion
Initial post: Sep 28, 2011 5:47:34 PM PDT
[Customers don't think this post adds to the discussion. Show post anyway. Show all unhelpful posts.]

In reply to an earlier post on Oct 4, 2011 2:32:56 PM PDT
D. Giggy says:
[Customers don't think this post adds to the discussion. Show post anyway. Show all unhelpful posts.]

Posted on Oct 11, 2011 12:45:40 PM PDT
Jim says:
Thanks for posting the electrical specs; I was wondering about the current output for charging other devices.

Posted on Oct 17, 2011 12:43:58 PM PDT
Nemesis says:
Thanks for the specs. Always nice to get that type of info.

Posted on Oct 18, 2011 4:46:48 PM PDT
Wayne says:
Actually, the specs, as well as tolerance range, are a clear part of the highly standard USB spec. All adapters would have to work the same way since the devices get the same power levels when the USB cable is plugged into a computer. Furthermore, battery powered computers will have varying voltage levels since batteries die. So the standards have to account for fluctuation, and the Kindle will be designed to handle larger fluctuation ranges than the spec allows. Amazon doesn't want people returning defective Kindles that burnt up when somebody used a third party adapter sold at Amazon and advertised as meeting specs -- which people would blame them for anyway.

I'm not suggesting that people stay away from this one to save a few dollars on a cheaper one, since this is a perfectly good one that's guaranteed to be well made. (Plus it looks the part.) But it's not as if the engineering challenge is so great that a company can't make a 5v adapter that's well enough regulated to work without it costing more than a few dollars.

The problem is that if you save a few dollars on a defective alternative, you may wish you hadn't wasted your time over a few dollars.

Posted on Oct 21, 2011 9:37:40 AM PDT
Dave says:
This is no different from any other USB charger, except that it costs $10 instead of $2.

In reply to an earlier post on Oct 21, 2011 10:22:32 AM PDT
Wayne says:
OK, I'll bite. Show me one that's otherwise identical in every respect except for the price.

In reply to an earlier post on Oct 26, 2011 9:31:04 AM PDT
Last edited by the author on Oct 26, 2011 9:34:04 AM PDT
I found this information very interesting.

In reply to an earlier post on Nov 12, 2011 5:47:00 PM PST
Joel Kolstad says:
Wayne -- While you're correct that USB specs are quite standardized, the specs have also evolved over time... and for that matter, there are many USB devices out there that aren't compliant with the spec, as well as many power adapter that aren't either.

The significant point with this particular adapter is that it's rated to 850mA. Current beyond 500mA is a relatively new part of the spec, having only been adopted a couple of years ago. Hence, there's a very good likelihood that many people will have 500mA (or even less)-rated adapter around which, AFAICT, will charge a Kindle, albeit more slowly than this one.

In reply to an earlier post on Nov 12, 2011 5:52:19 PM PST
Joel Kolstad says:
Dave -- that's a little short-sighted; there are plenty of "$2 USB chargers" out there that do not provide as much current as this one, and there are also plenty where the quality of the components used absolutely won't be as good.

What you're buying here is basically the assurance that this particular charger will work "just fine" with a Kindle. *Based on my own experience with dirt-cheap (e.g., $2) USB chargers over many years now,* if you do get a cheapy I'd say the potential outcomes are as follows:

60% -- Works fine, although charges the Kindle a bit more slowly than this one (because it was designed back when 500mA was the maximum USB current spec)
35% -- Works fine, charges just as quickly as this one.
4.99% -- Doesn't work to charge at all (or takes extraordinarily long to charge).
0.01% -- Might actually damage your Kindle!
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Review Details

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A. Dent "Aragorn"
(VINE VOICE)    (TOP 50 REVIEWER)    (#1 Hall OF FAME REVIEWER)   

Location: Minas Anor, GD

Top Reviewer Ranking: 17