Every year in the cold season, in areas without heating, some friends turn on the air conditioner to keep warm, and some keep warm by wearing thermal underwear. There are various ways to keep warm,among various heating equipment, electric hot water bottles are the most popular, it is relatively cost-effective. It can keep you warm for several hours after charging for a few minutes. It does bring comfortable warmth when it is cold. However, in order to buy a high quality electric hot water bottle, What to look for when buying a hot water bottle?
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