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All materialsForewarned is forearmed! Types of sockets in different countries of the world
Sockets in the world differ not only in voltage, but also in the types of plugs for them.
How to choose a surge protector
We consider from different angles the issues of protecting household appliances from too high or low voltage
Common battery types
Pros and cons of common types of batteries
How to calculate the battery life of home and computer equipment
How long will a conditional computer or refrigerator last from the UPS during power outages?