My Mercedes Benz
Analyze and Troubleshoot "Check Engine" MIL and Electronic Control Units (ECU)!
Testing your Mercedes Battery
DIY Battery Tester - Ancel BA-101
The BA-101 is small compact design that can scan quickly and then indicates test results directly. Anybody can use this unit to analyze
any 12V battery's health. It tells you everything about the battery: voltage, charge, cranking power, and how much life is left in the
battery (level of Ohm resistance) and does it does it quickly and precisely.
Has a very wide CCA test range, 100-2000 amps and is more accurate compared to its competitors. It can test to various battery standards. In addition, it checks the alternator's charging and starter's cranking conditions. Vehicle charging system test is also available, including load voltage, unloaded voltage, ripple status and charging system status.
The BA101 battery tester is well built with a medium size LCD display that has backlight and contrast adjustment. It directly indicates the test results. No internal batteries are required since it gets operating power directly from the 12V battery. It's equipped with a 3 ft long cable and made of a very thick flexible insulator. There are 4 buttons on BA101, namely "up/down" button for scrolling the menu. The "enter" and "exit" button allow for navigation back and entering menu.
Here's the results of testing my wife's Honda Lead Acid battery (6 months old) and re-tested again (10/22/20). The battery has slightly degraded over time but that's what batteries do!!! And that's why I bought the Ancel tester!
Also my new Champion AGM battery that replaced my lead-acid Interstate battery. The interesting stat is the lower internal resistance of the AGM style battery compared to a lead-acid battery - 2.6m ohm vs 4.4m ohm. And the price was right - on sale for $149.
The biggest BA-101 negative feature is the inability to CLEAR the device's memory. If you test battery "A" with a 'complete' test and then test battery "B" only partially (say a "QUICK TEST"), then the memory will contain battery "A" testing with battery "B" as the frontis piece. In other words, you have MIXED results and you are not aware of this. The unit's software BADLY needs an update!
Definitely a worthwhile device to ensure that your battery is at peak condition whether your car is driven daily or sits for long periods of inactivity as mine does. Price is apx $50 on Amazon.