Film cameras
Yashica Electro 35 GSN battery
1 × 5.6V mercury (legacy) cell
The Electro 35 GSN booklet names Mallory PX32 or Eveready E164. Mercury cells are obsolete — use modern alkaline PX32A / A32PX. Insert (−) end first; check the green battery light.
How to replace it
| How to open | Unscrew the battery compartment cover with a coin. Insert the 5.6V-class cell with the (−) end in first, replace the cover, then press the battery-check button — a bright green light in the exposure counter means adequate power. |
|---|---|
| Orientation | Minus (−) end in first |
| Access | Coin or simple twist |
| Notes | Remove the cell for long storage. Prefer true PX32-size alkaline replacements; PX28 adapters are a workaround, not the OEM fit. |
Important
- Original mercury PX32 is obsolete — use modern alkaline PX32A / A32PX sized replacements.
- Not an automatic 4LR44 / PX28 drop-in without an adapter and fit check.
- GTN shares the same PX32 / E164 family callout in period manuals.
Sources
Helpful for this device
Optional tools for opening, testing or charging — separate from the battery answer.
- iFixit Opening Picks
Non-marring opening for tool-free / clip housings
- Fluke 101 Digital Multimeter
Accurate open-circuit voltage and basic electrical checks
- Digital multimeter
Measure open-circuit voltage and general electronics checks
New battery but still not working?
A fresh 1 × PX32 should restore Yashica Electro 35 GSN if the battery was the problem. Work through the checks below before replacing the device.
- Check orientation
Confirm the cell is seated correctly: Minus (−) end in first
- Check the battery type
This device needs 1 × PX32 (mercury_oxide_legacy). Rechargeable cells are not supported for this device. Same size does not always mean the same battery.
- Check known model-specific issues
Original mercury PX32 is obsolete — use modern alkaline PX32A / A32PX sized replacements. Not an automatic 4LR44 / PX28 drop-in without an adapter and fit check. GTN shares the same PX32 / E164 family callout in period manuals.
- Confirm the battery itself
Try a known-good fresh cell of the exact code listed above.
- Still not responding?
If a correct, fresh battery installed properly does not restore the device, the fault may be elsewhere — the device may need service or replacement.