A battery charger is a device that allows you to charge your iPhone (or any supported device) for when you are on the move. There are so many battery charger out there for you iPhone that it can be hard at times to know what to choose. Today we will be looking at some of the best and most popular battery chargers on the market for your iPhone.

First lets take a look at the Anker® Astro3 10000mAh Dual 2A USB Output External Battery Backup and Charger

The Anker Astro3 comes with a massive capacity of 10000mAh / 3.7V. It adds about 40 hours of talk time to the iPhone.It features a Lithium Polymer battery that gets you about 500+ recharges. It has 2 USB ports with 2A output provide instant power for fast dual charging you devices .It also comes with a 18 Months Warranty. This device scored 4.6 out of 5 from more than 270 buyers voting on it.
Compatibility
USB Output I – 5V / 2A Designed for Apple:
iPhone 4S 4 3GS 3G / iPod Touch Classic Nano / iPad / iPad 2 / iPad 3
USB Output S – 5V / 2A Designed for Samsung Galaxy Tablets:
NTT DoCoMo Galaxy Tab 7.0 SC-01C / GT-P1000 Galaxy Tab 7.0
Both USB Output Compatible With:
HTC: One X / One S / Sensation 4G / Sensation XE XL / Radar 4G / EVO 3D 4G / Inspire 4G / Vivid 4G / Wildfire S / ThunderBolt / Incredible 2 S / Rezound / Desire HD S Z

Samsung: I9000 / Galaxy S3 S III I9300 / Verizon Galaxy S3 S III I535 / AT&T Galaxy S3 III I747 / Sprint Galaxy S3 III L710 / T-Mobile Galaxy S3 III T999 / Galaxy S II I9100 / T-Mobile Galaxy S II
T989 / AT&T Galaxy S II I777 / AT&T Galaxy S II Skyrocket SGH-I727 / Sprint Galaxy S II Epic 4G Touch / Galaxy Nexus / Galaxy Note / Focus S / Infuse
Motorola: Atrix 2 / Triumph / Photon 4G / Verizon Droid 3 X X2 Bionic Razr
LG: Vortex / Revolution / Quantum / Thrill 4G / Optimus V S T 2X 3D 7
Nokia: N900 / N9 / N8 / N97 / C6 / C3 / E71 / E72 / Lumia 900 800
Amazon: Kindle Fire
Others: Blackberry Bold 9900 / Sony Ericsson Xperia Arc S / 3G 4G mobile WIFI hotpot / Nook Color / MP3 MP4 MP5 / GoPro

The next charger we will be looking at is the Anker® Astro 5600mAh Backup External Battery Pack

This Astro charger has a High Capacity of 5600mAh. It adds about 22 hours talk time to your iPhone. The charger was designed with portability in mind. It also comes with a 18 Months Warranty.
The Astro scored 4.6 out of 5 out of more than 200 buyers voting on the device.
Compatibility
Apple: iPhone 4S (AT&T, Verizon, Sprint) / iPhone 4 (AT&T, Verizon) / iPhone 3GS / iPod Touch Classic Nano / iPad / iPad 2
HTC: One X / One S / T-Mobile Sensation 4G / Sensation XE XL / Radar 4G / EVO 3D 4G / Inspire 4G / Vivid 4G / Wildfire S / ThunderBolt / Incredible 2 S / Rezound / Desire HD S Z
Samsung: I9000 / Galaxy S3 S III I9300 / Verizon Galaxy S3 S III I535 / AT&T Galaxy S3 III I747 / Sprint Galaxy S3 III L710 / T-Mobile Galaxy S3 III T999 / Galaxy S II I9100 / T-Mobile Galaxy S II T989 / AT&T Galaxy S II I777 / AT&T Galaxy S II Skyrocket SGH-I727 / Sprint Galaxy S II Epic 4G Touch / Galaxy Nexus Prime / Galaxy Note / Focus S / Infuse
Motorola: Atrix 2 / Triumph / Photon 4G / Verizon Droid 3 X X2 Bionic Razr
LG: Vortex / Revolution / Quantum / Thrill 4G / Rumer Touch / P500 / GT540 / GW620 / GX500 / KP500 / Optimus V S T 2X 3D 7
Nokia: N900 / N9 / N8 / N97 / C6 / C3 / E71 / E72 / Lumia 900 800
Amazon: Kindle Fire / Kindle Series
Others: Blackberry Bold 9900 / Sony Ericsson Xperia Arc S / 3G 4G mobile WIFI hotpot / PSP / Nook Color / MP3 MP4 MP5 / GoPro

Next up is the Anker® Astro2 Dual

The Anker Astro2 has a Capacity of 8400mAh and adds about 33 talk hours for you iPhone (4 full charges). Also has a Compact design to be very portable. Like the previous chargers you will get 500 + recharges out of this device. The device features 2 USB ports for dual charging your devices. And like the other chargers the Anker® Astro2 comes with a 18 Months Warranty.
Compatibility
Apple: iPhone 4S (AT&T, Verizon, Sprint) / iPhone 4 (AT&T, Verizon) / iPhone 3GS / iPod Touch Classic Nano / iPad / iPad 2 / iPad 3
HTC: One X / One S / T-Mobile Sensation 4G / Sensation XE XL / Radar 4G / EVO 3D 4G / Inspire 4G / Vivid 4G / Wildfire S / ThunderBolt / Incredible 2 S / Rezound / Desire HD S Z
Samsung: I9000 / Galaxy S3 S III I9300 / Verizon Galaxy S3 S III I535 / AT&T Galaxy S3 III I747 / Sprint Galaxy S3 III L710 / T-Mobile Galaxy S3 III T999 / Galaxy S II I9100 / T-Mobile Galaxy S II T989 / AT&T Galaxy S II I777 / AT&T Galaxy S II Skyrocket SGH-I727 / Sprint Galaxy S II Epic 4G Touch / Galaxy Nexus Prime / Galaxy Note / Focus S / Infuse
Motorola: Atrix 2 / Triumph / Photon 4G / Verizon Droid 3 X X2 Bionic Razr
LG: Vortex / Revolution / Quantum / Thrill 4G / Rumer Touch / P500 / GT540 / GW620 / GX500 / KP500 / Optimus V S T 2X 3D 7
Nokia: N900 / N9 / N8 / N97 / C6 / C3 / E71 / E72 / Lumia 900 800
Others: Blackberry Bold 9900 / Sony Ericsson Xperia Arc S / 3G 4G mobile WIFI hotpot / PSP / Nook Color / MP3 MP4 MP5 / GoPro / Amazon Kindle Fire

Next up is the PowerGen Mobile Juice Pack

The PowerGen has a Capacity of 5200mAh and provides 2 charges for iPhone 4. It has a portable and stylish Design. The PowerGen uses the a LG Cell that is very reliable. Output: DC 5V/1000mA; Intput: DC 5V/1000mA. It also comes with a 1 Year Limited warranty. It scored 4.5 out of 5 stars from more then 220 buyers.
Compatibility
Apple:iPhone 4S / iPhone 4 / iPhone 3GS/ ipod touch/classic/nano/ iPad/ iPad 2 [OEM CABLE REQUIRED]
HTC Sensation XE XL / Thunderbolt / EVO 3D / EVO 4G / Incredible S / Evo Shift 4g …
Samsung Galaxy S 2 / Epic 4G / Galaxy S 4G / Galaxy Nexus …
Blackberry Curve / Storm 2 / Tour Style / Bold …
Motorola Atrix / Bionic / Droid X , X2, 2 , 3, 4, Pro , R2D2 / triumph …
Nokia N900 / N8 / N97 / C6 / C3 C7 / E7 / X6 …
LG Optimus , 2x , V , S , T / Quantum / Vortex …
Sony Experia ARC Arc / Neo / Play / Mini …
Amazon Kindle Fire, and all other kindles …
Others Nook Color, NDS, Portable Wifi, PSP (NOT compatible with PSP vista)

Lastly lets take a look at the Trent iTorch IMP52D

The Trent iTorch adds about 27 hours of Movie time to your iPhone. It comes with a very reliable Lithium-Ion battery that has a capacity of 5200mAh. It has a life cycle of about 500 charges that are pretty standard these days. The IMP52D is compatible with all original Apple cables and AC chargers.
Input: 5V / 1A
Output: DC 5V /1A
It scored 4.4 out of 5 with more than 500 buyers voting on it.
Compatibility
Apple:The New iPad/iPad2/iPad/iPhone 4s/ iPhone 4/ iPhone 3Gs/ iPod Touch/Classic/Nano
Samsung Galaxy Note/Galaxy S3/Galaxy S2 / Galaxy Nexus /All the other Samsung cell phones
HTC Evo Shift 4G/Incredible S/Sensation XL /Thunderbolt / EVO 3D / EVO 4G / All the other Samsung cell phones.
Motorola Razr/Atrix / Bionic/ Droid X , X2/ triumph/All the other Motorola cell phones
Nokia Lumia N900 / C6 / C3 C7 / E7 / X6/ N8 / N97 / All the other Motorola cell phones
Blackberry Playbook/Tour/Storm 2/Curve/ Bold/All the other Blackberry cell phones
LG Optimus / Quantum / Vortex/All the other cell phones