Rechargeable 2800mAh External Power Battery Back Case for Samsung Galaxy S2 i9100 - Black

Pros: - good build quality - good stand on the tabel

Cons: - only good for one time loading up to 80% - blue blinking loading leds are tooo bright - fully loaded in more then 4 hours

Other: Less then half the price like the original, good build quality and 80% loading are good for recharging even it could be loaded a little faster, over 4 hours i think it's to long. Butt over all strong buy.

Pros: A good case to have when you're gonna be out all day with some heavy phone usage. It extends your phone's battery life by about 50-60%. Convenient because it is a case and not a separate external battery.

Cons: It doesn't charge the phone while it is getting charged itself. It adds quite a bit of bulk but it is to be expected from carrying an extra battery inside.

Other: Highly recommended!

Pros: Compared to samsung galaxy s2 normal battery size, this product is a must have addition to the phone. Normal battery size is 1650mAh + this external battery case 2800mAh = 4450mAh battery capasity!!!!! Much more than with the power batteries and their big ass back covers. The battery case cover makes the phone grow about 2cm (1" = 2,5cm) in vertical direction and 1cm in depth. I can't see a huge difference at the weight, phone still fits pocket and you can feel its there.

Cons: The material is hard black plastic and is resistable to water, greaze and scratch. Keeps the phone safe and running over 2 days of aggressive playing and mobile surfing.

Other: Also the backstand is very usable and practical addition. The angle could be a little wider and the backstand pops very easily back in to the case. Some kind of lock mechanism would solve this problem.

Pros: Easy to use. Charges from 5% to 80% (provided the phone while charging, do not use). Has a convenient hinged stand - useful when watching video. When you connect the AC charger, charging only the default Power Bank. To charge Power Bank and the phone, after connecting to the charger, press the Power Bank. In this case, first charge the phone and then Power Bank. Then charging automatically shut down.

Cons: When disassembling it was found that the internal battery has a capacity of 2300 mA/h, instead of the declared 2800mA/h - this is an obvious deception. LEDs mode charge-discharge is too bright. It is uncomfortable to view. USB host for finding the phone Power Bank, does not work - this is an obvious flaw, as Power Bank created for Samsung Galaxy S2, which has this feature (OTG).

Other: Despite these drawbacks, it is recommended to purchase. Convenient to use without additional wiring, as if with additional sources of autonomous power supply.

Pros: Great device, very helpful. Extends battery life two-three times. Charging phone battery until it is full, then works on own until is discharged. When it is discharged, phone use own battery. Can be charged separately.

Cons: No visible cons. Will see durability in the future. Blue leds are irritating, could be little discrete. But that is only my opinion.

Other: easy to use. does what it should. great look and finishing. also protects the phone

Pros: Perfeito, acabamento sensacional. Material de qualidade, superou e muito minhas expectativas. Recomendo para todos aqueles que queiram um produto como este. Super fácil de usar, basta apenas plugar o aparelho e sair usando. pode ser acionado a qualquer momento, o que garante o seu uso apenas nas horas de necessárias.

Cons: Um pouco pesado, e aumenta a espessura do celular para cerca de 1cm. Se torna um parelho grande e pesado, mas nada que atrapalhe o uso do aparelho.

Other: Custo benefício excelente.

Pros: Quality material Light Fast Arrival

Cons: None, really... if I have to name one, it would be that the charging indicator lights are on as the device charges and you can't turn it off.

Other: If you are out a lot and have nowhere to charge your phone on the go, BUY IT! Does what it says.

Pros: Large capacity, you can use the phone while the battery charges internal battery. Easy to set up and understand how it works. Very good value for money.

Cons: Bit bulky. LED lights indicating charge level of external battery pack cannot be turned off while charging the internal battery. Cover doesn't protect the screen much, some cases (without battery) offer better protection.

Other: Very good device. Apart for few minor quirks extremely useful and not expensive.

Pros: I'm really happy with this product. It does what is has to do and the charging works like a charm. You can charge your phone at least once with the case. The case itself is very nice. It doesn't block any of your buttons and camera. It feels really descent. If you're going on a trip, this product will save your life.

Cons: The leds are a too bright. It would have been nicer if the case was a bit smaller.

Other: If you own a Galaxy S2 this is definately a must.

Pros: Very simlple in use and very usefull for traveling or even in everyday life. You can place this gadget on rechardge separately while using the phone.

Cons: Very simlple in use and very usefull for traveling or even in everyday life. You can place this gadget on rechardge separately while using the phone.

Other: Very simlple in use and very usefull for traveling or even in everyday life. You can place this gadget on rechardge separately while using the phone.