My phone provider supplied us with a backup battery. If we lose power, the battery will let us use our landline phone for up to 8 hours. The batteries need to be replaced and cost $50 each. The last one only lasted one year.
I read on a blog that oftentimes you can reset the battery and it can last months or even years.
Total Time: 5 minutes
Source: Blog
Supplies:
Steps:
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