MR-9 PX625 adapter for Olympus OM1, FT F1 film camera battery converter Feature:<br> The ideal solution for many cameras such as the Olympus OM1, Rollei 35, Yashica 124G, etc that used the original PX625 (1.35V) battery. (But will not fit Leica M5)<br> Today's equivalent to the PX625 battery is the "PX625U". It is the same size and shape, but the voltage is 1.55v - which means that the battery will give an "over-voltage" and would give incorrect meter readings.<br> One of the solutions is to buy a Weincell PX625 Battery, which at around 6.99 can make running your camera a bit expensive (as zinc air batteries only last a few months once they are activated)<br> So is there another solution?<br> Yes - fit this adapter (which is the same shape as the PX625 battery) into the battery terminal of your camera and power it using a "Zinc Air 1.4v battery "<br> - the good news is the 1.4v Zinc air battery (which is shaped like a standard LR44 battery) can be bought for around 50p - so it is a great saving if you use your cameras often. The zinc air battery are known as 675 battery (aka: hearing aid batteries)<br> The adapter is precision made<br> Please note: the listing is just for the adapter only - the "1.4v zinc air batteries" can be found online from a number of sources<br> (Image shows original PX625 battery against adapter and Yashica 124G - both of which are not included)<br> Q: Will this convert the voltage of a battery?<br> A: No - the adapter will not convert a voltage - it only converts the physical size of the battery<br> Q: Is there an adapter made that converted voltage?<br> A: Yes, there is an adapter made with a small micro chip - however, they are not too reliable - they work fine at the beginning, but after a few uses they start to give intermittent problems with the voltage. Our adapter has no chip, so it is much more reliable - and still gives the correct reading! (When using zinc air battery).<br> Q: So what battery do I need?<br> A: You will require a Zinc Air 1.4v battery - which is known as a 675 (often referred as a hearing aid battery). They cost around 50p<br> Name:Battery Converter Adapter<br> Packing List: 1*Battery Converter Adapter( Battery is not included)