For Immediate Roadside Starting (Boosters): They provide instant power to start your vehicle when the battery is low. They do not charge the battery.
For Charging from a Power Outlet (Chargers): They charge your vehicle's battery when it discharges during inactivity. They do not have the capability to start the vehicle immediately.
For Starting & Charging: They can start the vehicle and also charge its battery.
For Charging & Maintenance: They keep the battery in good condition, preventing discharge during inactivity. They offer slow and steady charging without causing wear to the battery.