Odometer reads 99,990 miles. Any way I can test my battery before it's out of warranty?

Don't actually buy an Alber Cellcorder. Unless you know the difference between battery and cell, you won't even understand it.

I was commenting that you only have 2 options: check the overall voltage or do a real analysis.

 

I'm not sure how much weight your own testing will carry when it comes to warranty.

 

If your battery voltage is a few volts low after a float then you probably have a bad cell.

If you take them cellcorder data showing a high internal resistance then they would almost definitely accept it.

 

If you have OBD-II plug and iPhone with Engine Link or Android with Torque, you can plot #s and see how it's doing.

We had it done with co-worker, his had 68K and mine 160K, and the difference wasn't as big. All cells were performing well, and the static MIN/MAX difference btw highest and lowest was slightly better on mine. Mine had bigger dynamic diff, but not sure if this is related to battery wear, or difference in driving style and/or ECU monitor delay.