What I'm gathering with batteries and silverdisks lead me to better describe them in my house rules for the game I'm running.
The basic gist I get is this:
Burnt out silverdisks lose their shimmer and appear to have dull, flat grey circuitry. 10gp value.
Dead, but still usable silverdisks have a dull silver shimmer to their circuitry. 100gp value.
Partially charged silverdisks have a dull blue shimmer to their circuitry. 100gp value.
Fully charged silverdisks have a distinct blue shimmer to their circuitry that can be seen in the dark. 100gp value.
Since the description in the book states that silverdisks destroyed by the recharge process are still worth 10gp, I'm making the assumption that the failed recharge burns out the circuitry rather than fully destroying the object.
Any thoughts? I feel it retains the flavor of the silverdisks while making it clear that batteries being called silverdisks are functional while silverdisks being used as currency are not.
For random piles of silverdisks as loot, I'm undecided whether to treat them all as being burnt out/unusable, or to go ahead and have a small percentage roll that determines how many of them are usable and how many charges they might have. After all, generators are few and far between. I may just toss in viable ones on a whim from time to time instead too.