"2350mAh" Rechargeable External Battery Back Case for iPhone 4 - Black

Pros: This is one HECK of an amazing product... ESP for the price!
It fits the iPhone 4 nicely, in a slide-on manner, than it clips at the top to keep it from sliding off. It's nice.
The weight is nice... doesn't add a lot of weight at all... definitely nothing to be worried about.
It does add a little bit of bulk to the iPhone 4, but it does so in a way that you can still use the iPhone 4 and all of it's functions without being in the way.
When my iPhone 4 is reaching 5% battery power, I clip on this case and it will charge it back to 100%, and I do believe it will still add more charge. I've never been able to deplete the case yet.

Cons: Zero. For the Price, not a darn thing I would find wrong.
Oh wait. Charging the Case does take over an hour or so, but it's not a big issue at all. It's a battery, and most batteries do take a little while to charge.

Other: This is the type of Battery pack that most people are looking for. It adds additional power to your iPhone 4... and it's amazing for the price.
I once charged this battery case from zero to 100% and left it in my truck for 2 MONTHS over the middle of dead winter.... and then I put it on my phone in need... and it worked. The battery charged my phone back to 100% and it wasn't drained from the weather.
This is definitely an amazing product. :)

Pros: Good capacity. Uses standard iphone charging cable making it easy to charge without carrying another cable. On/off switch prevents draining battery while connected unless you intend to use it. Fully charges battery when battery is low, more than doubles runtime between charges. Hold iPhone firmly in place and does protect the back of the iphone yet easy to insert and remove phone

Cons: No throughput for audio or sync as none of the pins are connected except for power on the input. Does not protect the top corners of the iphone or the sides fully

Other: Great value, good product. Minotr drawbacks that with some skill can be overcome. Would be nicer if it provided more protection to the sides of the phone, however that would also give it a drawback of being harder to connect and disconnect from the phone. Overall a very good product.

Pros: Does the job very well. Good quality product, very resistent. Charges the full battery of my iPhone 4, if it's in locked mode. Gives 3 hours of charging to your iPhone battery and gives something like a day of iPhone use, depend on the use.

Cons: Doesn't have an indicator of its charge. You'll have to guess how much battery of it you have used based on the time you have left it charge your iPhone.

Other: It's not perfect, but it's cheap and very good. The best buy I've ever made on Dealextreme.

Pros: This model holds ou to 50% more cmarge than most great product for the bucks I HAVE FOUND BEST OPPERATION IS TO USE THE MAIN PHONE BATTERY AND THE CHARGER TO BOOST THE MAIN AS NEEDED DOING THIS i CAN STRETCH USE TO A WEEK.

Cons: when removing phone u can press the volume buttons and worse accidently turn the volume off - I have made a habit of hecking this when I reassemble

Other: Well done good product

Pros: Awsome product. This external battery / case is awsome. It has four very good points: 1. Gives a lot of extra energy to my iPhone; 2. Holds firmly and protects the phone; 3. Looks very nice! Even tough it looks a little big it is quite nice. 4. Very usefull for people who uses a lot of GPS on the phone and tourists visiting new place (you won't be abandoned by your phone.

Cons: None. Since the product is very cheap it is worth the price. Some people might not like the size of this case, but you get used to it.

Other: Awsome product. Worth to buy!

Pros: - indispensable product! It does its job perfectly! - good quality product - very resistant - charges the full battery - works also as cover and protect the iphone very well - good capacity (the best on dealextreme) - gives new life to the iPhone battery! - it use the same cable of iPhone! - very good price!

Cons: - Doesn't have an indicator of the charge - doesn't have throughput for sync

Other: If you always looking for an electric socket in order to charge your iphone, you really have to buy this battery! It will save your life! :)

Pros: - Cheap - Reliable - Easy to use - Light weight - Works as a case, protecting the back of iPhone

Cons: - Charge of battery don't get to 100% when iPhone is in 3G mode (I use an iPhone 4S)

Other: It's a cheap and reliable product which satisfied most of expectations and worth the price. I recommend this.

Pros: Extra power on the go. Charges your iphone from empty to full, and a little more (like 30% or so). Looks great, charges with original apple iphone adapter

Cons: No cons actually, some status led indicators would be nice, but this for the $

Other: Great product, for this price you won't find something similar, at least not in The Netherlands. So if you need one ( even if you dont need one, it always comes handy if you leave it in the car of something), dont search any further, just buy this awsome battery case!

Pros: This is a great gadget for you iPhone 4 or iPhone 4S. It really works fine and recharges your iPhone completelly. Very useful when you are going to be far away from any plug and want to track your activity (wih any GPS-based application).

Cons: The only con I can find for this external battery pack is that it does not protect completelly the borders of my iPhone from scratches and other damages.

Other: If you need a cheap, external battery pack for your iPhone 4 or iPhone 4S go for it!

Pros: I have a real problem with my Iphone's battery - it won't last me even half a day without charging, so I was constantly worried that I would ran out, and carried a charging cable with me at all times. This charger solves this issue completely - it doubles the battery life, and you can start charging on the go without a worry in your head. it adds up very little to your phone width, but fits comfortably in you pocket. you charge it with your normal iphone cable, it takes a few hours to charge and there is a light indicating that the battery is fully charged.

Cons: I can hardly say it's a con, as it happens with all chargers - the device heats up a bit during the charge, but as I said - that always happens when you charge your phone.

Other: If you're looking for a reliable charger for your iphone - buy it.