Lithium jump starter

[PaulRainbow]

Wise people allow for the unexpected, especially on a boat. The more back ups you have the better. Failing to plan is planning to fail. I am a believer in sods law and also "what if"

Better to carry two jump packs then, just in case.

 

[Alex_Blackwood]

Better to carry two jump packs then, just in case.

But what if they both fail

 

[ducked]

But what if they both fail

To misquote Butch Cassidy "Are you crazy, the fire'll probably kill ya?"

 

[PaulRainbow]

But what if they both fail

The Gods are out to get you, just give up.

 

[Chiara’s slave]

I count myself fortunate. If my start battery were to be dead, I’d use the pull start cord.

 

[noelex]

Check the type of lithium battery used in these devices; many are not Lithium Iron Phosphate (LiFePO4).

 

[Big John]

I bought the Autowit SuperCap 2 Lite Jump Starter. First you need to understand there is no battery inside that needs to charged up. So it can sit in your car or boat unattended. It works on the super capacitor technology.
There are just large capacitors and a control circuit that allows you to start the engine. I have used on numerous cars and boats. It has never failed. Don't be put off by the small size and never having to ensure it iis charged as a battery starter module would have to be.

https://www.autowit.com/autowit-supercap2-jump-starter/

Pardon our interruption...

 

[Refueler]

Check the type of lithium battery used in these devices; many are not Lithium Iron Phosphate (LiFePO4).

Many are actually LiCo .....

 

[ducked]

I bought the Autowit SuperCap 2 Lite Jump Starter. First you need to understand there is no battery inside that needs to charged up. So it can sit in your car or boat unattended. It works on the super capacitor technology.
There are just large capacitors and a control circuit that allows you to start the engine. I have used on numerous cars and boats. It has never failed. Don't be put off by the small size and never having to ensure it iis charged as a battery starter module would have to be.

Autowit Supercap2 Jump Starter - autowit

Pardon our interruption...

Post #30 I suggest that these are probably safer and more durable than the lithium types, though I dont know that for an absolute fact.

I think they rely on some residual charge in the resident battery to charge up, though. If this/these were absolutely dead, a supercap starter might not help you.

I've wondered whether using a permanently wired capacitor to supplement the resident battery routinely might help engine starting, especially if using "golf cart" style batterys not primarily designed for engine starting. I dont know what the minimum capacitor size to make a difference would be though.

 

[Big John]

These are a lot safer than the normal boost starter units that have permanaent batteries in side. Especially if they use Lithium ion which can explode or in the case of sealed lead acid will go flat on you when you need it. In normal cases a flat battery will not start an engine but will still retain near to 12vdc off load. The Autowit takes that 12v dc and charges up the capacitors. Read out on the unit tells you voltage and the internal circuit will sound when the capacitors have charged. It does not take long. When you are ready the start button is pressed and then it counts down 10 secs. At that point you turn the ignition key and start the engine. It is so simple.