How would “an average joe”
test one of these automotive battery chargers against one another, at not too high a cost?
I see these Belkin Battery Backup Rev. B units in local Thrift Stores fairly regularly, priced at $4 to $6.
https://www.newegg.com/p/2FT-000S-0...QBaEAQYASABEgIf9fD_BwE&gclsrc=aw.ds#These have a built in battery tester/charger.
( It might be possible to use them as automotive battery maintainers? )
I plug them into a wall socket at the Thrift Store,
and if the battery does not test bad,
I buy them to get the Yuasa 7 amp-hour SLA battery inside.
I use these Yuasa SLA batteries in APC Uninterruptible 120v Power Supplies.
https://www.atbatt.com/yuasa-np7-12...fiIm-7AIVCb7ACh1SDQqEEAQYASABEgIuYvD_BwEHow could I create the best “home brew” test
if I had several identical make and amp-hr rated batteries,
one brand new Yuasa battery,
and two to four used ones?
