The 9V battery in the multimeter reads 9.3V. Why can't I use it?
This will be explained in two aspects. Because 9V laminated batteries are divided into carbon batteries and alkaline batteries!
1. Carbon batteries have large instantaneous current, but they don't last long! The point is cheap! If you don't use it and leave it for a month or two, it will basically consume a lot of power. When you use it up and the battery is low, you replace it with a spare battery, only to find that it runs out of power again not long after use. The specific performance is displayed on the multimeter, and there is no word. Turn it off and on again and it will show up again. Take off the measurement voltage, there is 8V voltage.
2. Alkaline batteries have stable output and long life, and are very suitable for use with multimeters. I used to use carbon batteries, and I used several of them a year. Since I replaced the alkaline battery with a well-known domestic brand, I haven't had any problems like yours. If you think about it, when you are detecting voltage and resistance, the multimeter has insufficient power and a large error occurs. How deceptive? The low discharge characteristics of alkaline batteries enable them to be stored for a long time. The shelf life is 10 years, so you can store it with confidence.
If your 9V battery is used up quickly, it is recommended that you use rechargeable batteries. Even if you use ordinary batteries, it is also recommended that you use the freshest batteries. All batteries have a factory date, but some people will use old batteries or even used batteries to recharge them. Packaging is marked with the date, so the place where you buy the battery is also important.
