12 volt 18 amp gel battery?????

landyacht318 wrote:
I have a MightyMax 18Ah AGM battery, but one marketed for the stereo boom boom crowd as a '600 watt' battery. I was kind of hoping for more of a high rate budget battery as opposed to one intended for deep cycling.

It can, by itself, start my overnight cold 5.2 liter v8 engine in warm ambient temps.

I asked Mightmax for the charging specs and they said to use the specs for the generic UB12180.

Which helped confirm my suspicions that my AGm battery is just a UB12180 with a different sticker.

But perhaps it is different internally. I would have to have another battery to compare it to performance wise to know for sure.

The UB12180 and the UB 12200 and the UB 12220 are all the same size, but 18, 20 and 22AH capacity respectively, Different weights.

The MM Gel battery, is likely indeed a GEL battery as opposed to AGM. Usually GEL batteries have more specific recharging regimens, lower and slower than AGM, or voids can form in the gel electrolyte and forever impact capacity thereafter. A GEL battery 'might' not be a good choice for your charging source.

I think for a mobility lift I would want a battery at least advertised as a high rate battery, one which should be able to maintain higher voltage during the load, perhaps meaning it will raise and lower the lift faster. It should also be able to handle a higher amperage rate charging source.

I have this one bookmarked, and kind of wish I bought it instead of the mightymax '600 watt' 18Ah AGM I did buy, although I can't really complain about its performance/ longevity at this point.

https://www.amazon.com/NPP-HR1280W-Rechargeable-Battery-Terminals/dp/B01J952KWW/ref=pd_sbs_23_12?_encoding=UTF8&pd_rd_i=B01J952KWW&pd_rd_r=29A4PWVDZ30PPRRRYZFF&pd_rd_w=cStgi&pd_rd_wg=50cll&psc=1&refRID=29A4PWVDZ30PPRRRYZFF

For best life recharge to full often, every few days if drawn to the 50% range, will compromise its longevity, but ultimately convenience wins out and it is your choice.

I'd go for an AGM as opposed to GEL in this application, and perhaps a bigger one if it will physically fit.

Thanks for the reply and advise. Yes I do want the easiest battery to maintain and use. 2 quick questions. if the LIFT calls for a 18 amp battery does it matter if this one is a 20 AMP?? and 2nd, do these batteries let off any fumes or gas? I have a sealed container for it on the lift, will i have to put vents in it or it is fine being a sealed box? thanks again for the help.