Battery Testing a mobility scooter -interpreting readings.

[Harry Bloomfield]

I/we have a little used since new, in 2010, scooter here. It was accidentally left on, some years ago, which it seemed completely killed the batteries back then. Not expecting much, I pulled both out, and separately put them on smart chargers. It took several weeks, but both eventually came back to life and managed to hold a decent charge.

I'm a bit restricted in stamina, for walking range - so I made some use of it, about a mile each way, down a long hill then back up from the chippy. The battery meter, after which, would hardly show any loss of range at all. Plugging it into its own charger, it would show charging for just a few minutes, then go green. Unused now, I plug it in when I remember, maybe once per year, despite knowing it will immediately go green, seconds after plugging it in.

If I were more certain of the range, I would be more inclined to make use of it..

If only there were some reliable way to check the capacity of the batteries..

 

[Rodders53]

You can get specialised conductance testers that will determine the remaining Ah capacity of 12 V lead acids... https://www.thesafetycentre.co.uk/act-612-intelligent-battery-tester is an example.

A good battery store, or mobility shop might use one?
My mobile caravan service tech had one that printed out the results of his test on the leisure battery.

I purchased a cheapo from Amazon that is likely pretty inaccurate, but suffices for my needs. Not all do lower Ah batteries, and are aimed at vehicle batteries.