Oh how the mighty Bisco has fallen...

...or both.

 

For a jump-starting battery pack when 12V dies, I am thinking this one. Is it overkill for PRIME? I do own another hybrid SUV and our son who still lives with us also has a Honda hybrid. So, it is not exclusively for PRIME.

NOCO Genius Boost Pro GB150 4000 Amp 12V UltraSafe Lithium Jump Starter - JumpStarter.io

 

When the battery backup costs more than the battery? Yeah, that's a sign.

 

OK, that one is overkill for PRIME and other hybrids. I thought larger capacity may come handy if I need it as an emergency power bank to charge other things like laptop or phones, but I do have a smaller battery power bank for that purpose. How about this one. 1/10 of Amps, but substantially cheaper. Would it be big enough for PRIME and other hybrids?

Tri-State Battery Warehouse : NOCO GB20 BOOST Sport 12V Lithium Jump Starter [GB-20] - $79.95

 

Interesting...sounds like a similar process to 'jumping' dead tool batteries ( ahem...like the infamous Ryobi One+ batteries ). In fact, I just 'jumped' four of my One+ batteries a couple weeks ago. However, I used my 12V battery charger to do it vs. another battery.

 

True but having some extra capacity isn't necessarily a bad thing.

That should handle most any vehicle.....except maybe a big 24V diesel.
It should handle a situation where the battery is REALLY weak.
It should still work if you have neglected to recharge the pack for a LONG time.

 

That's the one I have but have so far never used.

 

That's the point of having it. Like a spare tire, life preserver or fire extinguisher, I prefer that they are NEVER used and gladly throw them out when their service life has expired.

 

It's insurance.

 

@bisco, if you have Pep Boys close by, give them a call. They sell a Bosch battery for under $200 and it has a date code and they install for "free". I had good luck with that on my 12V Prius battery adventure.

 

The key with an agm is to find out its weak before it fails or you dry out and blow separators ruining the battery.

Normally a weak AGM is just dried out, turn it on it’s side an hour then upside down a half hour then trickle charge using a dumb charger for a few hours to see if the voltage starts stabilizing.

I drilled holes an added a few teaspoons of acid to 2 failing AGMs restoring them.

If the batteries free it’s worth a few experiments but it’s really just for fun.

My Honda Insight I just use a $19.99 lawn mower battery and replace every 2 or 3 years.

 

I don't think you can support that statement.

Since a "real" AGM is fully sealed, how do you figure the "water" is going to get OUT ??
Hint: it won't unless subjected to EXTREME conditions which will upset the chemistry too.

Trying to "rejuvinate" a completely dead and/or dry battery is a fools errand.
It just isn't worth the trouble.......and some of the "procedures" can be dangerous too.

 

Yes, and they'll install it without loosing your radio presets (they have a thing)

 

Bisco, Im surprised you dont know this but AAA has a battery service. the one in my truck died (from a bad alternator, but thats another story) they came out and swapped it out. all i had to pay was the battery it's self, about $130 with tax. (the truck battery is physically larger than the Prius one so maybe the Prius one will be cheaper?