PX625 Battery Alternatives
The original mercury batteries (1.35V) have long been banned. Here you’ll find the three best solutions for your analog camera — and learn which fits your model.
⚡ Quick check: Which solution fits?
How to find the right solution
What matters is how your camera draws battery power. Open the battery compartment and check:
- Contact top + bottom? → The O-Ring Adapter is enough (cheapest solution)
- Unsure or side contact? → Use the Universal adapter made of conductive plastic — works in almost all cameras
- Never want to buy batteries again? → Get the Varta V80H Set with USB-C charger (sustainable but more expensive)
Important: All three solutions replace the banned PX625 / MR-9 / PX13 mercury batteries. Do not use 1.5V alkaline batteries (LR44/AG13) — they distort the exposure meter.
Comparison at a glance
| Solution | Voltage | Battery type | Price from | Contact type | Durability | Special feature |
|---|---|---|---|---|---|---|
| O-Ring Adapter | 1.4V | 675 Zinc-Air | €16,95 | Top + Bottom | 3–6 months | Cheapest option |
| Universal (Conductive) ★ | 1.4V | 675 Zinc-Air | €19,95 | Universal | 3–6 months | Always fits — when in doubt, choose this one |
| Varta V80H Set | 1.25–1.30V | NiMH (rechargeable) | €49,95 | Universal | Rechargeable | Sustainable, USB-C charger |
O-Ring Adapter
The simplest and cheapest solution: A rubber ring centers the smaller 675 battery (zinc-air, 1.4V) in the PX625 compartment. Ideal for cameras that draw power through contacts on top and bottom.
When is the O-Ring the best choice?
If your battery compartment has a contact at the bottom and one at the cap (top). This is the case, for example, with the Rollei 35, Olympus OM-1, and Canon F-1. The zinc-air battery delivers 1.4V — very close to the original 1.35V — and has a flat discharge curve like the old mercury battery.
Compatible with
- Rollei 35 / 35S / 35T
- Olympus OM-1
- Canon F-1 (old)
- Canon FTb / FT-QL
- Minolta SRT 100 / 101 / 303
- Nikon F (Photomic)
- Nikkormat FT
- Pentax Spotmatic F
- Leica SL2
Universal adapter (conductive plastic)
The safe choice for all cameras. The adapter is made of conductive plastic and works regardless of whether the contact is on top, bottom, or side.
★ Our recommendation
You don’t know what type of contact your camera has? Then use this one. The conductive plastic conducts electricity over the entire surface — no matter how your battery compartment is designed. Works in almost all cameras that use PX625 / MR-9 / PX13.
Compatible with
- Agfa Optima 500
- Canon Canonet GIII QL17
- Canon F-1 / FTb / FT-QL
- Konica Autoreflex T3/T4
- Leica CL / SL / SL2
- Minolta Hi-Matic 7S
- Minolta SRT 100/101/303
- Nikon F / Nikkormat FT
- Olympus OM-1 / 35 RC / Pen FT
- Pentax Spotmatic F
- Praktica TL / LTL / MTL
- Rollei 35 / 35S / XF35
- Voigtländer Vitessa 500
- Yashica Mat 124G
Rechargeable set (Varta V80H + USB-C)
The sustainable premium solution: A Varta V80H NiMH battery with its own USB-C charger. Never buy disposable batteries again.
Who is this set for?
Ideal for frequent photographers who regularly use their analog camera on the go. The V80H battery delivers about 1.25–1.30V — slightly lower than 1.35V. With negative film, this isn’t a problem (about 1/3 EV slight overexposure). The charger is compact enough for any camera bag and charges via USB-C.
Cost factor for 2 batteries: Some cameras (e.g. Gossen Lunasix, certain Leica models) require two PX625 batteries. In this case, you need two V80H batteries (€9.95 each extra), which increases the cost. Zinc-air based solutions (O-ring or universal) are significantly cheaper in this case.
Compatible with
- Rollei 35 / 35S / 35T
- Leica CL / M5
- Canon F-1 (old) / FTb / FT
- Minolta SRT 101 / 303
- Olympus OM-1 / OM-1n
- Nikon F (Photomic)
Supplies & accessories
Replacement batteries and refill packs so you’re always ready to shoot.
Further Resources
Battery Problems & Solutions (FAQ)
No contact? Draining too fast? Light meter acting up? All common problems and solutions.
Canon F-1: Changing the battery
Step-by-step guide with pictures — replace PX625 with type 675 + O-ring.
Rollei 35: Changing the battery
Complete guide for Rollei 35, 35S, and 35T — including contact cleaning and tips.
Battery Finder
Find the right battery for your camera model — in under 60 seconds.
Not sure which solution fits your camera?
Send us a message with your camera model — we’ll help you find the right battery solution.
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