Lugbolt
I would be interested in your comments on the modern battery testers. The ones which replaced my favorite, a carbon pole load tester.
Battery conductance testers work by sending a small ac current through the battery, and measuring its electrical resistance; they then use this information along with a mathematical model of the battery to calculate the battery’s performance parameters.
On a few occasions friends have had starting problems, had their battery tested and judged OK but the starting problems continued.
I connect my carbon pile tester to their battery and in seconds the fact that the battery really has no guts left is obvious.
I read that the new testers were developed so the dumbest guy in the shop can use them without blowing up a battery.
I second your comments on booster cables..... junk.
Only half the clamp is energized because their design relies on a rusty spring and rivet to energize the other half of the clamp.
Only good set I have I made from welding cable and welding ground clamps.
Dave
Dave, I've had mixed results on carbon pile testers. We have one at work, mandated by the manufacturer. When we get a battery that is "in warranty" and questioned, we have to send them the data from the tester, and "usually" it's correct. However, there have been a few times it was wrong.
I still rely on an old "toaster". It actually loads the battery. I also use it on golf cars. We have a discharge unit that is indispensable for testing the entire bank but if you have one bad battery, the rundown box won't show just one, it just shows the pack as 'weak', thus I use the toaster to find the weak one.
ironic we was talking about booster cables. Tractor wouldn't start yesterday, so I had to put them to use. Worst part was lugging 40lb or so of those cables around. Figured if it won't start the tractor at least I can use them to pull it to the shop. Those were the cables I keep in the car. The ones in the truck are 2/0, longer, and about 65 lbs. But I have not had anything yet that they won't jump off. I hate inferior tools!!