2350mAh Rechargeable External Battery Pack for iPhone 4 - Black

Pros: i've tested with iphone 4 and it fits perfect . The phone starts charging when you change the bottom on/off. You have a LED with led light when you recharge and greed light when recharge is over. Plastic used is high quality and the battery pack don't dis-charge if is not used for a long period of time. Also you can recharge Ipod 4 (tested) but it not fits for it.

Cons: i have H2000 (SKU 56423) but the position of charge socket is not the same as Iphone 4 s-o it doesn't fit into the battery pack.

Other: good product if you have Iphone 4 and don't mind if your phone will look bigger.

Pros: -Brings a TON OF LIFE TO YOUR IPHONE4! Don't have to worry about playing games and your battery dying!
-Glossy sleek back
-uses ipod plug to charge! useful if you have more than one ipod charger!
- option to charge or not to charge ( i have a Digipower charger too and it doesnt ahve the option to stop charging)

Cons: Bigger than most of those brand name external battery pack!
Can't check how much battery is left..

Other: Would suggest anyone to buy because its best for its buck! save a lot of money depsite being a little bigger.

Pros: Super battery backup for the price. Keeps my iPhone at 100% for several hours. Fit and finish is very good.

Cons: Slippery finish, no instructions, status light doesn't work without unplugging the cable from the power source.

Other: Buy it -- I don't think you'll find better at anything close to the price.

Pros: - Design magnificent, looks great!!!
- Build quality is excellent
- The precision they made it with is awesome
- Finishing touches like matte and glossy are a beauty
- You have a ton of power
- You can recharge the iPhone battery from 20% to 85% two times, and you still have a little bit more power
- I love the optional switch for charging
- It's a light weight

Cons: - It's BIG (it's length is, but I don't mind)
- Does not pass-through data, nor it connects with iTunes

Other: You can go on a Holiday (4~5 days) without recharging.

Pros: > This is a great little battery pack/iPhone case. It gives my iPhone 4S double the battery life it normally would have.
> Slim design, lightweight. It doesn't add much weight or an excessive amount of extra "bulk"

Cons: > The build quality isn't outstanding. It's not bad by any means but not amazing. For the price however you can't go wrong.
> Doesn't give the phone a lot of protection.

Other: For the price this battery pack is a great deal. A great option if you're going on vacation and need that extra battery boost. The battery pack isn't the best for protecting the phone, it IS however is very small and compact and fairly "stylish".

Pros: It looks nice and expensive, fits perfectly on my iPhone 4, works great! Tem uma aparência bonita e cara, serve perfeitamente no meu iPhone 4, funciona muito bem!

Cons: - Sometimes the iPhone shows the message that can not charge with this product, but if you turn off and on again, it works again. - As vezes o iPhone mostra a mensagem de que não pode recarregar com esse produto, mas se desligar e ligar de novo, volta a funcionar.

Other: It could come with the cable to recharge, but it's ok. Poderia vir com o cabo pra recarregar, mas tudo bem.

Pros: is really easy to use, it can charge my 4S from 5% to 100% like the original charger. is great when you are late and the phone is with low battery or in trips. it's have a interrupter below that you activate the battery if you want yo charge or not.

Cons: it doesn't have a battery level bar so you can't see the charge left. the connector do not do data transferring .. can't connect to itunes with it on or use an accessory like radio emitter.

Other: inside have 2 batteries

Pros: - Looks neat! - Charges my battery as it should, I would say that it charges about 150% of my iPhone 4 battery - Great on/off switch fot charging - Great LED that indicates when its charging - Lightweight

Cons: - Looks kinda weird, because it's kinda tall, but I dont mind - It gets kinda hot if charged for long periods None more that I can think of really

Other: If you use your cellphone too much, or don't like to charge your iphone all the time, its a good buy

Pros: you are able to charge your phone on the go! It has a light to see if it is fully charged or not. It is a nice design and not too thick.

Cons: Doesn't protect your phone too well. Phone gets a little warm while charging.

Other: Great product especially for the price. If you go on a long car ride this comes in handy.

Pros: Quality. I don't how to say, but quality is not "Chinese". Plastic and printing is very "European". It feat IPhone 4 very well. It is easy to install and dismount. It has a switch to begin charging IPhone. Full capacity of this battery can charge your iPhone from 5 to 100 % of battery two times.

Cons: It is looks too big for its capacity. S2 external batteries have same capacity, but twice smaller. Long charging. No, VERY long charging. Standard internal iPhone 4 battery has approximately 1400 and charges 1,5-2 hours (using computer USB port). This thing charging 10-12 hours. If you use your phone while charging, it will charge only 5-10 % of battery for an hour. So you need to give a rest for your iPhone while charging, if you want to charge it quickly.

Other: If you have enough time for charging it is good buying. It's very stylish. But it is electric scheme don't allow urgent charging, amperage is too low.