2000mAh External Backup Battery Pack Case for Samsung Galaxy SII I9100 - Black

Pros: *Cheaper the the orginal one made by samsung. *Will always give you a full charge if the phone is off *Nice design *Goes flush with the phone front when you hold it up to you ear. *holes for the speaker (but the sound gets a little lower thats all) *gives you extra use time and prolonges your battery time.

Cons: * I dont think its 2000mAh *does not charge your phone fully if you use it while you charge *the indicator leds stays one while charging phone so it wastes energy. *The first charge took a long time.. *the case cant be charged while the phone is chargeing but has to be charged seperatly. * makes transferring data unusable. but if you connect the usb directly to the phone as normal or but the case in charge mode it does work. * the usb connector has to be flipped around instead of being put in the same way as the phone.

Other: The case prolonges your use but it also wastes some of the charge on powering the indicator leds...

Pros: Well constructed, works fine, charge with the same original cable micro usb. Dont add to much wieght or size for the phone! works the same way a mophie on an iphone, but with less then half of the price

Cons: the only cons is the button on the bottom, that you should press to start using the external battery...its kind a too sensive...causing some pocket pressing. But is not a real problem...just a comment

Other: Must have for Galaxy S2 owners! really nice!

Pros: It Suits the Samsung Galaxy S2 I9100 really great, the battery is pretty good. The materials are really good looking and good quality. 100% Recomenden. I live in Mexico and i can't find this even at online stores.

Cons: Maybe a Con, could be that it makes the phone a little bigger and you can't take it in your pocket. The texture of the case it's a little uncofortable if you have it in your pocket.

Other: Buy it if you have a SII it's the perfect gadget.

Pros: Extend battery life of your phone at least two times. No cheap feeling at all. All inputs and buttons are accesible when using this case

Cons: Power button and volume control is little bit difficult to use with this case, but you can get used. No fashion case - nice mobile as SII looks really big with this case

Other: Must have thing for all active users. Price is low, but it is really useful for my activities.

Pros: acabamento fino e reforçado encaixe perfeito e leve.

Cons: Carreguei e ele não esta carregando meu aparelho. Parece que esta com defeito. Estou carregando novamente pra ver se funciona. Ele lida mas logo depois desliga.

Other: não funciona perfeitamente deve ter vindo com defeito Power Pack Galaxy 2200mAh S2 / SII i9100 Super bateria externa, para emergências ou até carregar sua bateria de forma portátil e sem tomada. Modelo: Samsung Galaxy S2 - i9100 Características Material: ABS Black +UV Capacidade: 2200mAh Tipo Célula: Li Polymer battery Lithium-ion Peso: 50g Output voltage: 5V Output current: 750 mA Input voltage: 5V Input current:100~400mA Tempo de carga: 4hrs Carga através do USB pelo computador, notebook, tomada, etc... Cor: Black Itens inclusos Case Bateria externa Galaxy S2 i9100 2200mAh Manual Usuário Cabo USB2.0

Pros: Good product overall. It can be attached to phone and use the phone while charging.

Cons: LED's are too bright (i used some black marker to make them "dimmer"). It will load from ~20% -> 9x% if your phone is on and gets little warm on pocket. Also after several months of usage the clipping is not that tight anymore but still holds.

Other: I think i buy second one.