I have been using mine for a week with no probs. I have been using the extended battery with the aluminum case and can get two days use out of it, and i have had BT on all day both days and done some small amounts of tethering and surfing with it.
Well, after several weeks of emails, phone calls and generally wasting WAY more time than I would like, I received an email from the "Customer Service" (yeah, right ) department stating that my batteries are shipping today and a tracking number to boot.
All's well that ends well, I guess. One thing's for sure, and that is I will never do business with this outfit ever again. Way too flaky for my taste. Sure, the price was right, but it cost me a whole lot more in aggravation.
Good on ya' to everyone who got theirs & are happy campers.
Sorry to hear about your bad experience Keith. I actually took a chance and bought two extended batteries from them last week. My order was pretty complicated, since I bought each battery separately, on two separate days, and then paid on a single invoice to save on shipping. They shipped promptly and I got the batteries within a week. They look 100% authentic and work great. I don't know where those people get them, but wow...
Well, I also decided to try this. Bought one for 5.99 (extended) and sent a message asking if I could buy another and combine the shipping. (It said you could, but I couldn't figure out how to do it....dumb me.) Anyhow, I sent an email to "originalcell" but never received a reply. After 5 days, I just paid for the one. Got an email today saying that it was being shipped and I got the tracking id number. So, I don't know about responsiveness to issues, but I guess I will be getting a pretty cheap battery (even with the shipping...total of $13).
I had a hard time trying to figure out how to make a multi-battery order and finally just bought (1) extended battery. Got it - works great. Now I wil buy a couple more.
Yes, it looks like they are not very responsive when you ask questions, but buying more than one item is pretty smooth (although not quite obvious). All you do is bid on several auctions and buy the stuff you want. Then you go to checkout. I clicked on the "pay now" link on the ebay page, which re-directs you to their checkout site. You give them your ebay-registered email address, and their checkout site pulls up all of the items you purchased. Then it shows you the total including the multi-item shipping discount. I ended up getting charged the exact amount they advertised in their auctions.
I have ordered two from this company on EBay and received very fast. no problems, also bought Mugen slim I don't use it anymore keeps falling off and the company has replaced it twice. (Love the battery, but keeps falling off) The snap in is not the same as the OEM.
I have ordered two from this company on EBay and received very fast. no problems, also bought Mugen slim I don't use it anymore keeps falling off and the company has replaced it twice. (Love the battery, but keeps falling off) The snap in is not the same as the OEM.
I have purchased four of the slim Mugen batteries now, and three of the four have all developed the same symptoms as you describe. However, it is not the "snap" as you say - there really is no snap on the battery, but a catch that slips into the phone. The problem is that the back of the battery develops a "swelling" over time. Meaning, it becomes slightly rounded. The round shape pushes against the inside of the phone, and prevents the battery from locking in place.
The company, Lion Battery, has been very good to work with, and has replace the defective batteries, but even the new ones sent to me soon develop the same problem. Neither I nor Mugen knows why. They don't make the battery; they are only the distributor for them. Mark at Lion has told me that he is checking with them to see what the problem is, but I have not heard back from him about this, and I currently have one swelled-non-usable battery from them, and one that is still ok, at least as I write this.
My suspicion is that the battery overheats and then swells up. But, when I use a Samsung battery under obviously the same conditions, no swelling problem is found.
So, I too have bought a number of the Samsung batteries from the same eBay seller, and they all work fine - just not as long as the Mugen.
The problem is probably in the plastic. Under certain loads the phone gets fairly hot, and the battery can also get just as hot, and I would be they are using a cheaper grade of plastic, or a thiner plastic (to get more juice in the battery). I have a plastics company for a client and I asked once about the differences in plastics, and they said that some have a higher heating point, making them less likely to bend over time and with temperature changes, and other's are regrinds which can lead to problems too, depending on how often the plastic was "reground".
I was asking about a few parts I had for my R/C car, and the fact that some of the pieces held up well, while others snapped and bent. They said that some were made better (better quality plastics).
But you never know...
__________________
-Michael
Need help setting up your i730/i830 or other WM2003/WM5 Phone, as well as the other hacks I have done, check out the MRailing Guides and Links
Michael, I am thinking that you are absolutely correct about this, especially about the Mugen batteries. On the original Samsung batteries, the back side of the battery (the part that faces the inside of the phone) seems to be of the same material as the outside of the batteries. However, on the Mugen batteries, the back side is different - it is a thin, black piece of plastic. It is this part that swells up over time, thus not allowing the battery to fit against the phone correctly.
Update
) department stating that my batteries are shipping today and a tracking number to boot. 
Way too flaky for my taste. Sure, the price was right, but it cost me a whole lot more in aggravation.
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