$35 $50

Amazon with Topdononline has the TT TOPDON AB101 12V 100-2000 CCA Car Battery Alternator Analyzer Load Tester for $50 - $15 off with coupon code AB101POST [Exp 6/20] = $35 with free shipping.

$35 retail: $50
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Comments & Reviews (3)

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Super_Flubber
Ben's cred: -191
Posted 06/18/2021 at 06:35 PM PT
Posted 06/18/2021 at 06:35 PM PT
This tool is good. The better way is with an actual load. A carbon pile resistive load test at 100Amps+
*please do not use your tongue, those are for tiny 9V variety.
dave_c
Ben's cred: 5728
Posted 06/19/2021 at 10:56 AM PT
Posted 06/19/2021 at 10:56 AM PT
Be sure to use it correctly, if hooked up over loose or corroded battery clamps, or connection to alternator is corroded, etc, the results won't be accurate. Well they will be as far as what the electrical system is doing but you won't be able to determine if your battery or alternator is bad.
Super_Flubber
Ben's cred: -191
Posted 06/19/2021 at 06:39 PM PT
Posted 06/19/2021 at 06:39 PM PT
Good heavy duty clamps. When I use a carbon pile load. I disconnect the ground cable. I don't want to overload the alternator. I want to test the battery in an isolated state.
For testing the alternator (with battery connected) I use a DC AMP clamp on meter, slowing adding loads...lights, A/C, Rap music at 11, etc... ......while reading your voltage on a separate DMM. Last test was 90+ Amps at ~13.1VDC