Do li-ion rechargeable batteries in flashlights discharge gradually like normal batteries (letting you know you should change them) or do they abruptly stop working? - Quora
![9 (7.4v) Li-ion rechargeable battery maximium drain current? - Electrical Engineering Stack Exchange 9 (7.4v) Li-ion rechargeable battery maximium drain current? - Electrical Engineering Stack Exchange](https://i.stack.imgur.com/6bfqm.png)
9 (7.4v) Li-ion rechargeable battery maximium drain current? - Electrical Engineering Stack Exchange
Why does my lithium ion phone battery discharge fast from 100% till 85% then discharge rate slows till emptying? - Quora
![How to charge Lithium Iron Phosphate lithium ion battery packs including packs with high current and High Capacity. How to charge Lithium Iron Phosphate lithium ion battery packs including packs with high current and High Capacity.](https://www.powerstream.com/z/charge.jpg)