These are characteristics of battery chemistry, common to lithium - ion batteries across the industry. (businessinsider.com)
I don't need to go into battery chemistry here, but having too much voltage drop across the battery terminals will shorten the battery's lifespan. (mechanics.stackexchange.com)
The prices of batteries have changed over the past three years because of refined battery chemistry, and could be about half the price they were 3 years ago. (myfocuselectric.com)