Is batcap800 better than smaller ones?

[chillcat34433 10+ year member]

I'm getting a batcap for my car and was curious about the 800 model (1/2 the size of a normal car battery). Is this a batcap, just a little bit bigger?

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[helotaxi 5,000+ posts]

It's a normal battery that has been "shocked" to lower the ESR.