Tuesday, May 29, 2007 at 23:33
My business before I retired was selling Mobility Scooters. The best used batteries to get are ones that have been in golf scooters (not golf carts), because they have to be replaced when they won't do a full 18 holes, whereas batteries in footpath scooters are replaced when they won't get the user down to
shop and back. I used to
test used batteries for how many amp.hours were left in them, and sell them for between $0 and $30. (The only way to
test AGM batteries is by using a deep cycle discharge
test, which most scooter sellers can't or don't do.) Some Scooter people will give you their old batteries for nothing.
Try Scooters & Mobility, Scooters Australia etc.
NOTE: GelCell batteries are not the same as AGM batteries. GelCell are more finniky in their charging requirements, but will last a lot longer from new. Secondhand, there is probably no difference, because they are all secondhand because they won't get the scooter owner out and
home again!
BTW, I've made a simple deep cycle discharge tester. I bought a VoltMinder from Derek Bester ( Affordable Batteries & Radiators - see Directory) and take it out of the vehicle to
test batteries. I've set up 4 21W tail lights in parallel. These discharge a 12v battery at about 6.6A. By setting the voltminder alarm to go off at (say) 11v, you can multiply the time taken to get from fully charged down to 11v by 6 or so to get approximately the amp.hours in the battery.
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