The time it takes to fully charge the battery.
The device works longer without being charged.
3.has a rechargeable battery
The battery can be recharged and used over again.
4.operating power consumption
How much power the device consumes when it's switched on.
Battery power, or battery capacity, represents the amount of electrical energy that a battery can store. More battery power can be an indication of longer battery life.
This feature conserves power when unit is not in use or recharging. It also shuts the machine down if it inadvertently gets trapped in a confined space.