Do most underground pet fence systems come with a battery backup included in the base cost? Always 6% In most cases 6% In some cases 18% Never 12% Not sure 56% Get Free Quotes Today! Question: Do most underground pet fence systems come with a battery backup included in the base cost? Top Answer (56% of 16 votes): Not sure. Answer: Not sure Explanation: Guess Pemberton Painting Get Free Quotes Today! Find Local Pros Free Electronic Pet Fence Installation Cost Estimates Related Questions Does each wireless pet fence collar require its own transmitter box?Top answer: Not sure Is it possible to install a pet containment system without any underground wires?Top answer: Yes, there are wireless systems Can the wire for an underground pet fence be installed above ground?Top answer: In some cases Is purchasing a lightning protector for an underground pet fence a good idea?Top answer: Always How long does it typically take for a dog or cat to learn the boundaries of a wireless fence?Top answer: 1-2 days