60v 20ah Battery Advice Needed

Willie1

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I'm a disabled senior looking to step up from the smaller 24v mobility scooters to an outdoor one with more speed and range.
I'm looking to choose from a couple 60v ones that will probably need a battery (or batteries) in the near future. Both scooters use a single 60v 20ah battery packs that have the battery in a removeable container, with the ability to store a second battery. Would I have to bite the bullet and spend the $500-700ea for the direct fit 20 or 30ah battery units, or are there many options out there to just size match a RELIABLE "universal" battery into the container? I also have the tools and ability to fabricate a mount for a different series battery, such as a single larger ah battery if that was more cost effective. At this point I'm just looking to do my homework as to what to expect, or budget into purchase price, if either of these used scooters pan out but would need a battery replacement (or upgrade) in the near future. Thanks for any help or wisdom that can be offered.
 

ohv_

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have a link to the scooter in question? 60v in a mobility scooter seems high tho I haven't looked at these at all.

36v seems to be the sweet spot for the bulks of these. 60v is a big pack.

if you going to get a pack on your own, take a look at lifepo4 packs. they are a bit more stable and forgiving.
 

Willie1

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This is a pic of a replacement battery cartridge from a Fat Bear scooter- there are many clones that use the same style cartridge.
The Fat Bears are 60v and are offered at 60v/12ah for $297, 60v/20ah for $497, and 60v/30ah for $697.
Fat Bears usually have one battery mounted vertically under the seat with a storage area under the floor that holds an optional spare. There are many "clones" that have a single 48v or 60v in the floor only.

I'm still gathering info from the owners of a couple used scooters in the area - a couple 2 wheeled ones and possibly a trike.
I will know more soon if I need to source a battery. While it would be nice to install a "cost effective" upgrade battery in a factory cartridge, I am not opposed to building a remote mount for the right upgrade. And I'm looking at this a cost per a/h situation, with a goal of 40ah min - either in 1 big or 2 small batteries.
 

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tylerssn

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take a look at lifepo4 packs. they are a bit more stable and forgiving

Also, I grabbed a 48v that had a built in battery management system. Gave me much more confidence that I wouldn't burn anything down, including myself.

If you go this route, be sure you have documentation about the BMS. I bought one without much docs and it took me a little bit to figure out why it was registering a short when I tried to start my motor (it was asking for more juice up front to start than the BMS was prepared to give)
 
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