0 sats \ 1 reply \ @okpj 23 Jan freebie \ parent \ on: What possible future (technological) breakthrough might be a grave mistake? science
Link to an article: BETAVOLTAIC BATTERY RATED TO PROVIDE POWER FOR 50 YEARS
While the batteries in the picture and article are low power/long life batteries, it's only a matter of time before the Wh/kg of battery tech reaches a point these drone swarms become feasible.
On the bright side there's money to be made developing personal low-range EMPs or similar for defence, but that's another can of worms.