I recently purchased two of the cheap CMore scopes from Amazon. Both dots were very bright which I put down to new dot modules.
After 4-5 months I am ready to replace the battery in the first one. On removal I measured the voltage expecting to get a voltage in the 2.6 - 2.8 volt range. Guess what - 4.0 volts!
The battery seems to be a standard unit marked on the back with Duracell CR 1/3N 3Volts Mn O2-Li cell Japan and the letters FDK.
Has anyone come across this type of battery before?
Obviously I would like to get more as they are bright and last a long time. Jim