Are trickle chargers safe?

Related questions

1. Can a car battery be too dead to jump start?
2. Can you drive a car with a bad alternator?
3. Does an alternator need power to work?
4. Is there a difference between a power supply and a battery charger?
5. Is trickle charging bad?
6. Can a dead battery kill an alternator?
7. Do I need a trickle charger?
8. Do AGM batteries need a special charger?
9. Do car batteries charge while idling?
10. Can you trickle charge a completely dead battery?

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