Post by: GTRS Fiero on June 15, 2020, 07:31:34 pm
Post by: TopNotch on June 15, 2020, 09:01:15 pm
My late wife had a "granny cart" powered by two 12V gel batteries the size of tractor batteries. This particular cart is much faster than the ones in stores. I almost had to run to keep up when she went full speed. When the gel batteries went bad, I got a couple of Walmart tractor batteries for it. It still works.
The manual that came with it warned of over charging the gel batteries. I never did -- they just died of old age.
Post by: Fierofool on June 15, 2020, 09:24:38 pm
I don't know what batteries are in Mel's power chair, but the charger has an automatic shutoff when it's charged. It will then trickle charge if left connected to power. I have another chair that has lead acid batteries in it. When we got the newer chair, they died due to non-use and cold weather in the garage. I think when I replace them, I'll get deep cycle batteries. I wonder how a deep cycle battery would work in a car.
Edit: I just did some searching and I found that a deep cycle battery only delivers about 1/2 to 3/4 the cold cranking amps of a car battery and puts an overload on the alternator to keep it fully charged.
Post by: GTRS Fiero on June 15, 2020, 09:39:07 pm
Post by: NoMad on June 15, 2020, 11:12:16 pm
Post by: Raydar on June 17, 2020, 02:28:40 pm
I will be going to AGM or Lithium ion when I finish my 88. Used them in almost everything by now and been happy with both.
I had an Optima yellow-top in my car until a few months ago. It got to the point that it didn't have any reserve left. Just sitting for 2-3 weeks, powering nothing but the ECM, would allow it to go flat.
I replaced it with an AGM Duracell battery. We'll see how it goes.
I wanted a sealed battery since it's mounted in the front compartment.
Post by: GTRS Fiero on June 17, 2020, 06:07:30 pm
I had an Optima yellow-top in my car until a few months ago. It got to the point that it didn't have any reserve left. Just sitting for 2-3 weeks, powering nothing but the ECM, would allow it to go flat.
I replaced it with an AGM Duracell battery. We'll see how it goes.
I wanted a sealed battery since it's mounted in the front compartment.
These both show as AGM top-mount batteries. Are they gel batteries? The Optima appears to be.
Post by: GTRS Fiero on June 17, 2020, 06:08:52 pm
I will be going to AGM or Lithium ion when I finish my 88. Used them in almost everything by now and been happy with both.
What is the benefit of Li-On batteries over stock lead-acid?
Post by: Raydar on June 17, 2020, 09:32:06 pm
These both show as AGM top-mount batteries. Are they gel batteries? The Optima appears to be.
I never thought the Optima was a gel battery. They're advertised (unless I've had too much kool-aid to drink) as AGM.
Post by: NoMad on June 18, 2020, 12:50:56 am
I will be going to AGM or Lithium ion when I finish my 88. Used them in almost everything by now and been happy with both.
Weight. The last one I put in was less than 1/4 the weight and worked just as well if not better. Lasted about the same amount of time too. More costly though.
What is the benefit of Li-On batteries over stock lead-acid?
Post by: GTRS Fiero on June 18, 2020, 12:54:50 am
Post by: Raydar on June 18, 2020, 06:42:29 am
Weight. The last one I put in was less than 1/4 the weight and worked just as well if not better.
Conversely, the Optima battery was the heaviest freaking battery I have moved in... decades?
I don't remember the Duracell AGM being that heavy.
Post by: TopNotch on June 18, 2020, 09:46:54 am
Post by: NoMad on June 18, 2020, 09:48:13 am
Post by: GTRS Fiero on June 18, 2020, 05:45:12 pm
Post by: GTRS Fiero on June 18, 2020, 05:46:02 pm
This is a lithium-ion jump starter. I have used it to start cars with dead batteries a couple of times. As you can see, it's quite a bit smaller than a 12V lead-acid battery big enough to start a car. It's also quite a bit lighter.
I guess mine is the same, only a Scorpion.
Post by: GTRS Fiero on June 27, 2020, 02:31:21 pm