Feature: The ideal solution for many cameras such as the Olympus OM1, Rollei 35, Yashica 124G, etc. that used the PX625 (1.35V) battery. (But will not fit Leica M5.) Today's equivalent to the PX625 battery is the PX625U. It is the same size and shape, but the voltage is 1.55V — which may cause inaccurate light meter readings. One solution is to use a Weincell PX625 battery; however, zinc-air batteries have a limited shelf life once activated. An alternative solution is to use this adapter — designed to match the physical dimensions of the PX625 battery — and power your camera with a 1.4V zinc-air battery. The 1.4V zinc-air battery is commonly known as a size 675 battery (also referred to as a hearing aid battery) and has the same form factor as an LR44 battery. The adapter is precision made. Please note: This listing is for the adapter only. Zinc-air batteries are not included and must be purchased separately. (Image shows PX625 battery against adapter and Yashica 124G — neither of which are included.) Q: Does this adapter convert battery voltage? A: No. The adapter does not convert voltage. It only adapts the physical size and shape to fit the camera’s battery compartment. Q: Are there voltage-converting adapters available? A: Yes, some adapters include microchips for voltage regulation. However, these may become unreliable over time. This adapter contains no electronics, offering consistent performance and accurate meter readings when used with a 1.4V zinc-air battery. Q: Which battery should I use? A: A 1.4V zinc-air battery (size 675). Name: Battery Converter Adapter Packing List: 1 × Battery Converter Adapter (battery not included)