Good capacity (at least 2200 mAh), good quality of the replacement back cover. Adding a camera shutter might have been a good idea.

Price is a bit too high - some 50$ would be more appropriate. (Posted on 2/25/12)

For those who considering to buy it, just go for it, perfect quality and fast shipment...and for those who crying about 45º stand on backcover, just buy a TV set :) and i don't need camera cover, because 90% phones on the market has no cover, isn't it....good product, cheers (Posted on 10/13/11)

Bit of a bummer that I've had to ditch my leather case but well worth it for being able to get more than a day between charges
(Posted on 8/29/11)

Thank you for your prompt delivery. All is well and I plan to use the battery as a backup to the current one in use. I enjoy your product very much.
(Posted on 7/27/11)

Pros.
*Excellent Battery life, wifi is usable for longer periods of time.
*Perfect for those long days when you need an extra-large powersource to switch to.
*Has camera compabilitty (wouldn't expect anything else to be honest, as camera is a serious powerdrainer.

Cons.
*No lid for the camera, lense is visable at all times, even when camera-slider is shut.
*Big and clumsy, no 45º stand like the old backcover got.
*Takes a bloody long time to charge, even though it's mearly twice as big. (Posted on 6/16/11)

I had a mugen battery for my N95 which more then tripled the battery time.. I had the same hope for this one, and my prayers came true! Three days of intensive use (music + IM-ing + browsing all at the same time) is possible. With my old original battery it would last maybe 3-4 hours max.. Yes my device is quite alot bigger now, but I don't mind it that much. It still fits in my pocket and the weight is pretty much the same I think.

Final note: after my order i didnt hear anything for 3.5 weeks and I got a bit scared so I emailed the webmaster. Got a quick reply saying it was out of stock and coming in soon! Which it did! 2 days later it got shipped and I got it quite fast (1 week). Also the webmaster asked if I had suggestions to improve the site! Excellent service, excellent product.. Don't be afraid to purchase! Well worth the money. (Posted on 6/16/11)

Awesome battery.... at first i was in doubt but when i finally ordered it and start suing it it is awesome... the whole day my Internet is on and i receive calls and also before going to work i play music on it... and still with all that it keeps my 900 alive...
the original battery used to die after 6hrs or so....... the back cover is awesome.... compatible with the battery.... the best part it i can now use a dual sim jacket as well.. which fits perfectly above the battery..... (Posted on 4/7/11)

I purchased my n900 when it first hit the street. I was happy with it but disappointed in the battery life. I know that any mobile device will use power depending on settings. But with the extended battery, I can compute, surf and make calls all day without worrying about recharging.
Like one reviewer experienced, my case was broken in shipment. I contacted Mugen and a replacement arrived in like 3 days (and I am in Alaska's Bush region).
Yeah, it may look like a brick and the camera switch does not protect the camera lens (bummer), I still like it. (Posted on 3/13/11)

I can use my N900 for two days without any problems - I mean use - bluetooth still on coupled with my BH-905i headset and listening to the music, web browser, applications, 3G on... (using autodisconnect). Before my ritual was to plug in charger after I had arrived to the office, then plug in at home. One day out without USB or charger was impossible. Now two days are possible. For normal usage (mostly phone calls) I think it can work for 4 days without problems. So double battery life. But still not enough for whole day VoIP usage :( I'd buy even higher capacity one - 4000 mAh would be great.

One problem I had (and thus one star down) - I received cover without magnet - I found it in the shipping case so I had to use glue to make the cover working again. Otherwise - cover is well built, it holds even better than original one. And I really miss the stand... (Posted on 2/16/11)

I love this battery ,now im happy with Mugen.
For All users of driver injection or other software like NEOPWN V2 on n900, this is your solution ....
Thanx Mugen Battery. (Posted on 2/5/11)