He also says he gets 300- 350g of Silver per 1Kg of batteriesfrom the document:
From my own experience the composition of 1 kilogram of mixed spent button batteries(Li,MnO2 and Ag2O) is:
Manganese dioxide type Lithium type Silver oxide type
350 gr. 150 gr. 500 gr.
manuel was last active sept.2022. he might not get your message.
Quote from Manuel's document:
From my own experience you can get 300 to 350 gr. pure silver from one kilogram of spent silver oxide batteries.