Sony NP-FW50 battery holder

thingiverse

Sony's A7 cameras chew up batteries like candy. They all the the NP-FW50 batteries which are small and light - but you need to carry quite a lot of them around on a day's shoot. This is a simple holder for 4 batteries. You can insert the batteries terminal "out" or "in" and this can provide you a signal for which are charged, which are discharged. Rhino file provided in case you want to do a reconfiguration