What to do if my Energizer 50904 Battery Charger shows Er2 error and the battery won't charge?
- RRebecca MorrisAug 4, 2025
If your Energizer Battery Charger displays 'Er2' and the battery voltage remains below 11V after charging for 4 minutes, or if the battery isn't fully charged after 24 hours, the battery might be defective and needs replacement. Alternatively, a load connected to the battery could be the issue; disconnect it and try charging again. Also, the charge current might be too low, so try selecting a higher charge rate.