I use besides the supplied original push my old Canon FD and EOS lenses via adapter. By using an adapter Metabones for Canon EF lenses, which uses the power of the alpha 7 and transmits the most functionality of the original objectives, the energy consumption of the camera falls safely even higher than with the original objectives. My Canon telephoto needs stronger and more frequent re-adjust to the adapter, for example, than on the EOS camera. Therefore, this double whose batteries in accordance with the performance of the original accessories came just at the right.
Anyone toying with the purchase of a battery grip, anyway needs at least a second battery. The Alpha 7 is then a succession, when both are under control.
In use, I can not tell the difference of replacement batteries to the original. Nominally, they also have the same performance.
The charger is very compact and can be connected to three different power sources may be used (mains socket 220 V, USB / computer, car 12 V socket). From me there is a clear recommendation without restrictions.
