Capacity not really 2400mAh???

«See all threads (in Product Forum)

Product Forum

Gmozz Sunday, March 01, 2009 6:30 AM Reply

Just received mine and find that the capacity on both is only 1600mAh on a 1A discharge test.

Has anyone else found disappointing capacity on these or did I just a get some duds?

Posts(3) | Reviews | Tip post
captjimjam Sunday, March 01, 2009 12:01 PM Reply

Lots of the manufacturers like to exaddurate their batteries capacities.

Addicted to yellow envelopes!--UK--
I'm a forum only moderator and not part of DX staff.
To contact DX staff use: http://services.dealextreme.com
New customer guide: www.tinyurl.com/help-dx

Posts(6823) | Reviews | Tip post
algerath1 Sunday, March 01, 2009 12:19 PM Reply

I am not an expert with lithium ion cells but MANY years ago when I was in school for electronics most manufacturers would rate batteries at something like a 20 hour discharge rate.

example: a 1000mah battery would provide 50mA for 20 hours it would not provide 500mA for 2 hours, the capacity would drop as the discharge rate increased.

I know a lot of manufacturers do overstate capacity, but I also wonder if a lower discharge rate would get numbers at least closer to claimed capacity.

as I said I am not an expert on lithium ion cells, so it is possible that they don't suffer from this condition or not as much as the older cells I dealt with, just a thought.

Posts(170) | Reviews | Tip post
frills Sunday, March 01, 2009 12:37 PM Reply

I bought this SKU a few times back when it was around $11 and it performed pretty close to rated in field tests with a buck/boost driver in a single-cell cree light known to pull an average of 1.2A. It got a few minutes past 2 hours with dropoff in the last ~15 minutes before the protection circuit cut in, so we estimated a 1:50hr run giving at least 2200mAh capacity.

I really hope this isn't a reduction in production quality that coincides with the price drop, because I just ordered a new pair recently.

Posts(3318) | Reviews | Tip post
sheepish Tuesday, March 17, 2009 5:02 AM Reply

Lead-acid batteries are indeed normally specified by their capacity from a 20 hour discharge. They suffer a lot from the Peukert effect, which means they have much less capacity when discharged faster. However Li-ion cells aren't affected anywhere near as much.

DX has found a new way to deceive customers:
Use reviews for different products that have not been bought
by the person who wrote the review.
http://club.dx.com/forums/forums.dx/threadid.1462252

Posts(24527) | Reviews | Tip post
stevelines Sunday, April 26, 2009 3:56 PM Reply

Just got mine in the past week... Every one of them is coming up between 1000 mah and 1700 mah.
Very disappointed in these.

Using the Mystery Charger / Discharger sold on DX.

Posts(12) | Reviews | Tip post

«Reply to this thread (in Product Forum)

Product Forum

Reply

Subject:

* 50 characters max

Message:

Please note: HTML codes are not allowed anywhere on this page (otherwise you will see an error).
Subscribe to this thread (get an e-mail for every reply)
I agree to DX's Terms of use

Post Message

* DX Forums are not a sales or product support board. For sales or specific product related questions, please send us a message. For after-sales support inquiries, please send us a message or submit a support incident to receive the fastest response.

o All postings not relating to product information or discussion will be forwarded to appropriate department accordingly and will be removed from our forum.
o No posting of any unsolicited advertising, promotional materials, or any other forms of solicitation. This includes any kind of references to other gadgets and/or electronics vendors, and price comparison web sites, appearing anywhere in the posts (including but not limited to subjects, contents, editorial comments and usernames).
o No pornography, obscenities, and defamatory postings are allowed anywhere on DX forum. Postings of this kind will be removed immediately, and a violation will be issued to the person responsible for the posting (several violations will result in blocking of your access to the forum).
o All users' IP will be recorded but real e-mail address is not required when posting on the forum.
o No usernames that contain obscene words, derogatory or racist remarks, or references to sexual acts or sexual anatomy are allowed on DX.com. Postings containing any usernames with obscene words, derogatory or racist remarks will be removed immediately.
o In the Forums, please keep all your postings relevant to the product information or discussion. Postings that are irrelevant, or that are designed to disclose personal contact information, promote personal pages, voting polls, or third parties may be removed. If you see postings that contain foul language or that are intended to harass other people, please contact us immediately.
o Intentional disruption of the flow of content or discussion by repeatedly posting the same message is not permitted. Members who cause disruption of this kind will be issued a violation that can result in blocking of access to the forum.
o Harassment of another person via emails or postings is not permitted. Harassment means: saying bad things about them; sending them unwanted messages; attacking their race, heritage, etc. Unsolicited "Spam" messages are also not permitted unless expressly authorized by the recipient. If you feel that another person is harassing you, please contact us.
o We reserve the right to remove all postings at any time, including any postings that violate these standards without any notice. This forum is designed for general product information and discussion, DX will not take any responsibilities for any material posted by people that you might encounter while using our forum.

Disclaimer and Limitation of Liability

THE DX.COM WEB SITES AND THE MATERIALS THEREIN ARE PROVIDED AS IS. DX MAKES NO REPRESENTATIONS OR WARRANTIES, EITHER EXPRESS OR IMPLIED, OF ANY KIND WITH RESPECT TO THE DX.COM SITES, THEIR OPERATION, CONTENTS, INFORMATION, MATERIALS . DX EXPRESSLY DISCLAIMS ALL WARRANTIES AND CONDITIONS, EXPRESS OR IMPLIED, OF ANY KIND WITH RESPECT TO THE SITES OR THEIR USE, INCLUDING BUT NOT LIMITED TO IMPLIED WARRANTIES OR CONDITIONS OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. YOU AGREE THAT DX, ITS DIRECTORS, OFFICERS, EMPLOYEES OR OTHER REPRESENTATIVES SHALL NOT BE LIABLE FOR DAMAGES ARISING FROM THE OPERATION, CONTENT OR USE OF THE DX.COM SITES. YOU AGREE THAT THIS LIMITATION OF LIABILITY IS COMPREHENSIVE AND APPLIES TO ALL DAMAGES OF ANY KIND, INCLUDING WITHOUT LIMITATION DIRECT, INDIRECT, COMPENSATORY, SPECIAL, INCIDENTAL, PUNITIVE AND CONSEQUENTIAL DAMAGES.

Please note that DealExtreme Forums are not a sales or product support board. While we do constantly participate in this forum, please contact us via support ticket for a guaranteed fast response. We make every effort to make the quickest replies.

Forums

Interest Groups

Other Features

Group Buying

AU/US/EU DIRECT

Country Site

APP & Mobile Site