Water heater can't fire solution: check the ac power plug lights are bright, to rule out power supply part of the question.
热水器打不着火的解决方法：检查交流电源插头指示灯是否亮，先排除电源供电部分的疑问。
Ac power sockets are receptacle for US 2 or 3 pins plug and European standard.
交流电源插座适合美式2或3脚插头及欧洲制式插头使用。
This means you can leave the AC power cable behind and only plug it in to the mains power when you need to recharge the batteries.
这意味着你可以离开空调的背后，仅电力电缆的水管堵塞，在当你需要电力充电。
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