Honda Odyssey jump starter B&D 300 amp.

  • If you're needing it to start your car over and over, then replace your >3 year old battery, or repair the faulty underlying system. Nov 13 '19 at 5:43

It depends on the type of jump starter you have.

If your jump starter is using a lead acid battery then this is likely fine but you should refer to the manual.

If you’re using a li-ion jump starter then it will contain diodes to prevent current flowing back in to the li-ion battery as they will get damaged and explode from the charge off of an alternator.

This tear down of a li-ion jump pack’s cables on youtube by bigclivedotcom shows the diodes:


  • I realise in the question description it lists the model of jump starter. I don’t know the specifics of it but others landing on this question from google should know not all packs can.
    – Pricey
    Nov 12 '19 at 23:08

No you can not.

These small portable jump starters have a different type of battery than what your car has. you must use the included charger to recharge your jump starter.

leaving it connected may actually damage the jump charger as they are not designed to be charged fast, the way your car battery is.


Can you recharge jump starter by connecting to battery

You can, even at idle the alternator will raise the vehicle system voltage, causing the battery to charge, and the jump starter connected to it. This model has a lead-acid battery that will tolerate a fair rate of charging - obviously it's aimed solely at cranking duty, so they're more optimized for high currents rather than energy density. It's a sealed battery, with typically small rubber valves that vent the cells, so don't let them get overcharged (when they start gassing). The regulator on the alternator would prevent that, though.

while driving

However - never move the vehicle with those big clamps on the battery terminals. It's an unfused circuit with not very mechanically positive connections, and the potential for a lot of current to flow should they move.

  • The alternator will not always produce sufficient current at engine idle...
    – Solar Mike
    Nov 13 '19 at 15:54
  • @SolarMike I've not seen any vehicle built in the last 30 years where the alternator can't cover the system loads at idle.It's generally a requirement of the design of the charging system. It was common on older vehicles with dynamos.
    – Phil G
    Nov 13 '19 at 17:09

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