Nice infographic explaining the situation attached.
Cocktail party dazzle – want some basic battery knowledge?
Unlike flashlight batteries, lithium-ion (Li-ion) batteries use “pressurized” “flammable” electrolyte chemistry. Exceeding any of the below ratings can create “sub-optimum combustion” ugliness.
Battery capability is the rate in MILLIAMPS a battery can serve to depletion in 1 hour expressed as “mAh”. Further complicating matters, mobile phones can use from 1/1000th mA to 3000 mA depending what apps are “fired” up at the moment.
Obviously the more the mAh, the longer the device will run with the resulting engineering puzzle of our time –
- Reduce power consumption through design elegance fighting against competitive development cycle demands
- Increase battery capability through chemical design fighting against size and weight demands
So we want our batteries to last a long time, and now we require ONE-HOUR charging. Battery flow rate is expressed in COULOMBS (C-rate) the maximum rate a battery serve (discharge) or ingest (charge) at any moment.
Fortunately, built in thermal sensors, electrical circuits and proper manufacturing have earned these batteries more than adequate safety ratings. Our demands to the industry and their zeal to deliver the next new thing, doing more, lasting longer, getting smaller and charging faster creates an edge where the Samsung situation can happen.
I would certainly never recommend putting an off-brand Amazon, Aliexpress or Ebay replacement battery in your pocket.