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Which alternative to jump leads avoids connecting two vehicles?

  • A.A battery charger in boost mode, which is used with the engine running and therefore supplies the starting current
  • B.A tow start
  • C.A slave battery connected in series, which raises the voltage and therefore provides the current required to crank
  • D.A lithium jump pack

Answer: D

A compact lithium pack delivers hundreds of amps briefly and avoids any risk to the donor vehicle. Boost charging is genuinely used in workshops, which makes the second option a real alternative. Series connection would apply twenty four volts and cause damage. The shared behaviour explains why these belong together and the differences explain why both exist. Checking which component actually carries the load settles most questions of this kind at once.

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