Graham Battery Co

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I purchased a battery at this location and on discovering that it was defective I returned it. Oh the staff was friendly enough when selling the battery but when faced with proof of a defective product they became quite unfriendly and uncooperative, even to the point of being threatening. In the end all that they would do was "pro-rate" a battery that was less than a month old and replaced it with a battery that I deemed suspect. I have decided that I will have no further dealings with this local business and I suggest that you do not deal with them either. It's just not worth the hassle and intimidating behavior of the staff. I recommend that you seek out reputable large regionally established businesses that have policies against rude intimidating employees and back up their products when defective.

Their battery was tested with the negative clamp detached isolating it from the vehicle and periodically measuring the standing voltage with a multi-meter. These are the results of the test. As you can see this demonstrates an average voltage loss of over 1% a day, TWICE the industry standard.

Date Time Reading
5/13/2020 17:26 12.65
5/13/2020 17:53 12.62
5/13/2020 18:40 12.6
5/13/2020 19:27 12.58
5/13/2020 19:45 12.57
5/13/2020 20:21 12.56
5/13/2020 21:40 12.54
5/13/2020 22:31 12.53
5/14/2020 0:45 12.51
5/14/2020 15:00 12.44
5/14/2020 16:54 12.44
5/14/2020 17:29 12.43
5/14/2020 19:29 12.42
5/14/2020 22:53 12.41
5/15/2020 2:49 12.4
5/15/2020 13:25 12.37

Hours % Loss
43:59 2.21%

Any battery will eventually discharge itself. A flooded car battery discharge rate is about 1% per day at room temperature, 0.25% per day at 10 °C (50 °F) and 1.5% per day at 30 °C (86 °F). This self discharge percentage is the percentage of the remaining capacity, so a flooded lead acid battery will still have 50% of its capacity remaining after 6 months. Low-maintenance and sealed batteries have lower discharge rates of less that 0.5% per day and calcium-lead batteries can have a self discharge of less than 2% per month. Once a wet acid battery falls below 12.3 volts, it can deteriorate quickly and start to sulfate rapidly.