I searched and could only find that other members replaced their battery.

What have you used as a successful replacement OTHER than the Clore PN# JNC105 battery?

The factory replacement costs $160 and up which is more than I paid for the entire unit. There are plenty of less expensive aftermarket units stating they're compatible with the JNC660; however, I'm skeptical of their quality. Additionally, I haven't been able to find specs on the Clore factory unit.

Thanks for any insight you can lend.

my 660 is 15 years old and still going strong,when it finally dies i will just buy a new one,125 bucks last time i checked.

If it were me, I'd see if you can find a battery with warranty, locally.
https://www.batteriesplus.com/ would be where I would look.

I'd love to know how you got 15 years out of it. I have 3-4 and it's taking all night to charge and 4 hrs to top off after unplugging for an hour. Gauge reads good volts every time I've ever plugged it in. Longest amount of time I'd go between top off's is 2 weeks and that's without any usage.

I just purchased one off EBay for $133 delivered in 4 days.

ya i am shocked at how long it has lasted.i used it to power a winch on a trailer once and forgot to take it off,about 10 minutes down the road a cop pulled me over,thought it was because the trailer plate was expired but no he had my jump&carry in his car,it flew off the trailer when i hit a bump.it is beat up but still works like new.

Got a Powersonic brand as recommended by a fellow member. I'll report back on its worthiness.

Keith