Just bougth an old Geodimeter "Unicom" Radio for Geodimeter EDM.
Unicom is an one way reciever for voice transmission between the instrument and a receiver
on the prism. The speech is transfered with help of the infrared measuring beam.
But the Unicom came without Charger. So removed 4 screws at the back and opened the unit.Found two empty old rechargeable nickel-cadmium nive-volt batteries. https://en.wikipedia.org/wiki/Nine-volt_battery
Replaced the batteries with new charged 9V batteries. Used my Geodimeter 220 EDM, spoke into the microphone and IT STILL WORKS 🙂
The Problem is how to charge the Unicom batteries without opening. The charging connector looks strange to me and i don??t know with how much Volt and Ampere to charge.
Does anybody own such an Unicom with original Charger who can help?
I've just stumbled across your request for info on the AgA Unicom device 2- 2 years later!! If you are still interested I have a Unicom and Charger which I could check for you if you wish
Regards
Maptack
Thanks for your offer, but on January 2019 i sold the item. But i will tell the new owner about your offer, maybe he will contact you.