the.com/trickle charging
the battery equivalent of sipping water all day instead of chugging a gallon.
means charging a battery at a very low, slow current to top it off or maintain full charge without stressing it.
from emerged with early lead-acid batteries, where engineers found that a slow, steady current could offset a battery's natural self-discharge without cooking the plates.
rate usedoften under c/20, barely a whisper of current
purposemaintenance, not speed, keeps batteries topped off
risk if overdoneeven trickle charging can overheat old batteries
contrastopposite philosophy to fast charging's brute force
for instance
car battery tenders — keep a parked car's battery alive over winter months
nasa satellite batteries — trickle charged via solar panels for years in orbit
nickel cadmium chargers — 1960s consumer electronics relied on overnight trickle charging