I've never heard of rechargeable batteries with a lifespan of 50 years. Also, the best quality photovoltaic solar cells have a lifespan of 25 years, and their o

I've never heard of rechargeable batteries with a lifespan of 50 years. Also, the best quality photovoltaic solar cells have a lifespan of 25 years, and their output is down to around 5% of original capacity by the time 20 years rolls around.