Acton launch on Friday AM? (08/28/20)

Thanks Guy. Any recommendations for a battery? The wall-wart charger I have for it states 12v-400ma over a 24hr max charge.

I know next to nothing about battery technology. I was happy enough with the battery (when it worked!) for lighting clusters and copperheads - I think that I would still like something that can put some fire behind some clusters.

-- Todd

Frank has already responded with the link to my go to recommendation for a battery. Taken care of, it should last many years and is at least twice the battery that you were using.
A good rule of thumb for battery charging is to take the stated capacity and divide by 5 to 10 for the charge rate. So for example, the newly recommended battery is a 5 Ah battery, so a charger that can charge at a 500 ma to 1000 ma rate would be about right. The faster you charge, the more heat generated in the battery as it charges. Heat is an enemy for a battery's longevity.
BTW, I just checked the battery on the charger. Even though the analog meter for the charger says about 2 amps, the battery is not getting warm at all, and I suspect it is not really getting much if any of a charge. Also, analog meters on dumb car battery chargers are not all that accurate.

Guy,

Google is your friend:

An AGM (absorbed glass mat) battery contains a special glass mat separator that wicks the electrolyte solution between the battery plates. This material's design enables the fiberglass to be saturated with electrolyte – and to store the electrolyte in a “dry” or suspended state rather than in free liquid form.