Iphone connect us to friends and family, entertain us, keep us up to date, house our music collections, and let us capture the world around us — that is until they run out of battery juice at 4 p.m.

The first thing you’ll notice about iPhone 3GS is how quickly you can launch applications. Web pages render in a fraction of the time, and you can view email attachments faster. Improved performance and updated 3D graphics deliver an incredible gaming experience, too. In fact, everything you do on iPhone 3GS is up to 2x faster and more responsive than iPhone 3G.

To help you avoid “battery low” situations in the future, we’ve pulled together a list of iPhone charging options to keep you powered up whether you’re at home, on the go, in the car, or half way up a mountain.

BeamBox MiLi Power Pack

Finding an iPhone charger case that isn’t totally ugly isn’t easy, so feel free to thank us in the comments for bringing this little gem to your attention. Without adding too much bulk to your slimline handset, the MiLi gives you up to 16 hours of power. It’s not quite as powerful as some standalone options, but that’s the trade-off to maintain your sleek iPhone image.

Belkin TuneCast Auto

Being on four wheels shouldn’t stop you from juicing up your iPhone, or indeed enjoying its tunes. This little beauty from Belkin lets you do just that. The TuneCast Auto’s ClearScan tech automatically finds the best FM frequency to send your music to your car stereo and keeps your iPhone nicely topped up with some good old fashioned electricity at the same time. All you have to do is pick the driving tunes.

Griffin PowerDock 4

We love this option for its sheer socialness if nothing else. The Griffin PowerDock 4 offers not one, not two, not three, but four charging slots for iPhones and iPods. With this on your desk, you’ll be a friend to coworkers who can sidle up for a quick charge and a chat, while its clean brushed aluminum base won’t ruin the feng shui of your workspace. Just make sure everyone grabs the right phone at the end of the day.

Powermat Wireless Charger Mat

Believe us when we say that nothing (apart from a robotic maid named Rosie) will make you feel more like George Jetson than casually placing your iPhone on its wireless charging mat as you sashay through the door. Slip your iPhone into a special Powermat receiver case and the mat’s magnetic induction and top secret “proprietary technology” will charge it up sans cables.

Solio Solar Chargers

Solio chargers offer a very green charging option by harnessing the power of the sun to keep your iPhone going. If you aren’t in a hurry (they take 10-plus hours in sunlight to get charged up to the full) then you can keep your phone going and be a friend to the poor old planet. Also handy for any wilderness situations you might find yourself in where the nearest USB port is down there on the left — about 43 miles behind you.