This is just the fact, all smart phones have short battery life. I carried two extra batteries and a wall plug charger around. Then I still found it annoying has to shut down the phone to replace battery. So I tried those external battery charging pack, like those iphone users have to use.
Tried the New Trent IMP500, IMP50D, and IMP1000. The results are
IMP1000 - it works but too heavy to carry around. I returned it.
IMP50D - two USB charging ports. It sounds promising. One port has a higher Amp output for charging IPAD too. However, if connect to MT4G without pressing the power button on IMP50D, it actually drain battery from the phone. There is no locking mechanism or any kind on the power button. It's flat and easily be hit. By carrying it, you might end up draining battery instead of charging. Also, it takes a very very long time to get a full charge to the phone. Not practical.
Now this is the winner IMP500. It's light weight and very portable. Only 1 USB port but it charges MT4G very quickly. The power button needs to be press and hold to turn on and off. So it will avoid accidentally turning on and off. Compared to IMP50D, it won't reverse drain the battery of the phone if connected without power on.
So I have been carrying this little piece around on trips. I can just it to charge if I see the phone battery is running low. Then in 2 hours or so, it becomes 80% charged. Very happy with it.
Tried the New Trent IMP500, IMP50D, and IMP1000. The results are
IMP1000 - it works but too heavy to carry around. I returned it.
IMP50D - two USB charging ports. It sounds promising. One port has a higher Amp output for charging IPAD too. However, if connect to MT4G without pressing the power button on IMP50D, it actually drain battery from the phone. There is no locking mechanism or any kind on the power button. It's flat and easily be hit. By carrying it, you might end up draining battery instead of charging. Also, it takes a very very long time to get a full charge to the phone. Not practical.
Now this is the winner IMP500. It's light weight and very portable. Only 1 USB port but it charges MT4G very quickly. The power button needs to be press and hold to turn on and off. So it will avoid accidentally turning on and off. Compared to IMP50D, it won't reverse drain the battery of the phone if connected without power on.
So I have been carrying this little piece around on trips. I can just it to charge if I see the phone battery is running low. Then in 2 hours or so, it becomes 80% charged. Very happy with it.
I always have it running as I am here now with WiFi using forum App.
