Are you using older iOS devices which have 30 pin connector? in that case you must check this charge and sync cable. This dexim green cable has EL lights,which shows us how fast the device is charging . The EL lights flows from the stranded USB port to the 30 pin port, which shows the flow of current to the device from the charger.
This charger has inbuilt controller which has 3 best features. If your iOS device low charge, the EL lights flows faster, once the device is almost charged (70%) the EL lights flows slower. When the Device is fully charged the EL lights stops flowing and power off. We don’t need to look at the device to check the charge status of the device.
This cable also works perfectly with car chargers. I tested this cable with wall charger with my iPhone and iPad, I really enjoyed it. Available for $20 in major stores. Do checkout my other iPhone accessories reviews here.