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Energizer Energi to Go Portable Case Charger for AT&T and Verizon iPhone 4 (Black)

Energizer Energi to Go Portable Case Charger for AT&T and Verizon iPhone 4 (Black)
From Energizer

List Price: $49.99
Price: $40.00

Availability: Usually ships in 1-2 business days
Ships from and sold by Shop Smart Online

39 new or used available from $27.82

Average customer review:
(54 customer reviews)

Product Description

Portable Case Charger for iPhone 4. Full Cover Protection. Extremely Thin (17 mm). Rubber edges – silicon back (durable and shock resistant). Micro USB charging port. Product Dimensions: 2.5 W x 5.1 L x 0.65 H inches. Talk Time: Up to 6 hours 3G and up to 11 hours on 2G. Internet Time: Up to 5 hours on 3G and up to 8 hours on Wi-Fi. Video Playback: Up to 8 hours. Audio Playback: Up to 32 hours. Power Capacity: 1200 mAh. Input Specs: 5V 500 mA. Output Specs: 5V 500 mA.

Product Details

  • Amazon Sales Rank: #1077 in Cell Phone Accessories
  • Color: Black
  • Brand: Energizer
  • Model: AP1201
  • Original language: English, French
  • Number of items: 1
  • Dimensions: 2.50″ h x .60″ w x 5.10″ l, .11 pounds


  • Flexible form-fitting silicone rubber case with built-in rechargeable battery; made for iPhone 4
  • Integrated bumper eliminates prevents signal loss or antennae interference caused by direct contact
  • Simultaneous pass through charge to your iPhone 4 and the case
  • Extra thin and easy to handle; durable, nonslip material
  • Provides up to 5 hours of 3G talk time, 7 hours of video playback, and 27 hours of music playback (in addition to iPhone’s battery)

Editorial Reviews

From the Manufacturer

The Energizer AP1201 case for iPhone 4 is the first and only silicone case with built-in rechargeable battery that provides a permanent power source that extends the life of the iPhone 4 providing twice the amount of power to keep you going. It’s the power, protection and style that you expect from a brand you know and trust.

Energizer AP1201 case for iPhone 4

Extremely thin, soft silicone
rubber case.

Power Management

The AP1201 provides high speed charge direct to your iPhone 4 or simultaneous pass through charge to your iPhone 4 and the case.

  • Standby up to 200 Hours
  • Music 27 up to Hours
  • Video up to 7 Hours
  • Talk up to 5 Hours on 3G (9 Hours on 2G)
  • Internet up to 4 Hours on 3G (7 Hours on Wi-Fi)
Energizer AP1201 case for iPhone 4

Keep your iPhone 4 charged up to twice as long when on the go.


Energizer AP1201 case for iPhone 4

Low Profile Protection

The AP1201 is a lightweight, flexible form-fitting silicone rubber case that is extra thin and easy to handle. The case is a one-piece construction made from a durable, nonslip, and finger prong resistant material.


An integrated bumper eliminates prevents signal loss or antennae interference caused by direct contact. A Smart LEDS monitor on the back cover monitors power status and lets you know when it’s time to recharge.

Made for iPhone 4 Certification

The Energizer AP1201 has been certified by an Apple designated test lab and received certification from Apple as a Made for iPhone 4 product. The AP1201 utilizes an Apple-designated 30 pin dock connector from an Apple certified vendor. We ensure 100% compatibility with your iPhone 4.

Powersafe Technology

All products integrate a minimum 12 safety logics into every cell for maximum protection of the battery, device and user. In addition, each product uses a mathematical circuit control unit with built-in proprietary software to control and regulate temperature, voltage and current.

Trusted Brand

The AP1201 is just one of a full line of Energizer Energi to Go solutions that is bringing convenient power to consumers, making mobility easier. Energizer continues to fulfill its role as a technology innovator by redefining portable power solutions to meet people’s active lifestyle needs for today and tomorrow with Energizer Energi to Go chargers for rechargeable portable devices.

What’s in the Box

Energizer AP1201 (black), USB charging cable, user manual, and welcome card

Customer Reviews

Most helpful customer reviews

28 of 29 people found the following review helpful.
4Power and Style
By John Braunstein
So far, I love my new case. I tend to be a heavy user (texting, music & game playing) and so I usually have to recharge my iPhone by late afternoon. This new case has solved that issue. In the 2 weeks that I have had it, I have yet to have to recharge it during the day. When I plug it in at night, I like how the case allows the phone to charge first and then it charges the case.

I also like the way the case looks and feels. I used to have a silicon case for my old BlackBerry and I loved it. With this iPhone case, I get a nice black finish (very stylish) with the feel of silicon. And it’s super thin (again like my old BlackBerry case).

I have no idea what the reviewer Jim is talking about. When I first got my iPhone 4, I definitely had the antenna problems that so many others were having, but I got my free bumper from Apple and the problem was solved. Since I have switched over to this case, not only have I not noticed any signal issues (aside from the usual ones created by AT&T), it seems that my signal strength may have improved. Now, I’m not sure if I am imagining the improved signal or not, but I do know that the case performs as well (if not better) as the Apple provided bumper that I was using before.

17 of 17 people found the following review helpful.
3Not bad if you can find it cheap
By J. Centers
– The extra battery life is fantastic. Easily another 5-6 hours.
– You can charge and sync the iPhone via the case’s microUSB port. The iPhone will charge before the case.
– Camera cut-out is large enough to not interfere with the flash.

– Silicone is a lint magnet, albeit not as bad as the Otterbox.
– Case blocks the dock connector.
– Bottom ridge scuffs my Zagg screen protector.
– Volume and lock buttons are hard to push.
– Actually syncing while the phone is in the case is touch and go at best.
– MicroUSB port is on the side of the case, near the bottom, which means I can’t charge it while it’s in my car dock. Very awkward.

I found this case for $30, and for that price it’s a steal. But at $60-70, I would probably go with one of the Morphie Juice Packs.

12 of 12 people found the following review helpful.
4Works well, is handy and convenient. Not perfect.
By James T. Jacobs
I ordered two; one for my wife, one for me. The positives: The case is not bulky or too heavy. It fits and protects the iPhone 4 well, and is no larger than most of the protective cases we already have. (I always carry my phones in a protective case.) If you start with a full charge on the phone and the case, you will have a very long use time, depending on what you’re doing with it. I tend to do things that drain the battery such as playing 3-D games and using GPS apps such as using it as my bicycle computer and navigator on long rides. This will keep me from running out of juice in the middle of nowhere when riding weather returns.

The negatives: There is a button to push on a bottom corner of the case to see how much charge you have left. It also functions to put the case in “quick charge” mode, so if you are charging the phone while it’s in the case, it will charge the phone first, then the case. Otherwise, it charges both at the same rate.

The button on my wife’s case works. The button on mine does not.

I’m not going to send it back, because otherwise it charges properly and works fine, and I like it. I charge the case separately from the phone, so the quick charge mode isn’t important to me. When I plug it in, the dots properly flash one at a time to show you how far the charge has progressed. (According to the instructions, there should be five lights, but there are only four.) I don’t really need the button function to know how much charge is left. If you start with the phone and the case fully charged, the case will keep feeding the phone, so the phone will continue to read 100% charge until the case is drained. Then, you will have the normal expected phone charge left.

This beats the little back-up batteries which plug into the end of the phone, because it is a protective case as well.

See all 54 customer reviews…



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