How long will it take to fill the teacher's horn?

First of all, you didn't say which brand of teaching speaker it is. This is difficult to answer, because different brands of speakers have different charging indicators.

But don't care so much about ordinary chargers. You don't have to look at the indicator light.

When the charger of the speaker is not fully charged, it should display a red light, but it displays a green light. What should I do?

Answer: The indicator light for speaker charging may be out of order, but it will not affect the use of the speaker. Generally, you can charge by time. Shengli brand speakers are generally nickel-hydrogen batteries, and the charging time of this battery is generally around 10 hour. It's probably like charging electricity for one night. When charging, you can charge by time. You can charge enough time when there is no electricity. There is no need to look at the indicator light.

Little oriole brand, Shengwei brand and Hongyun brand are all lithium battery amplifiers, which can be fully charged in 3 to 4 hours, depending on the time. Of course, under normal circumstances, there will be no problem.