The first digit from the left is a letter. It stands for the month of the year. A = January; B = February; C = March, etc. The second digit from the left is the year the battery was shipped from the factory. 4 = 2004, 5 = 2005, 6 = 2006, 7 = 2007, 8 = 2008, 9 = 2009, 0 = 2010, 1 = 2011, 2 = 2012, etc.
Usually, a battery is sold during the first three months after it is received from manufacturing plant. If they are shelved longer, it is Interstate Batteries' policy to recharge our batteries that are on a dealer's shelf or in our warehouse every three months in order to keep them fresh.
If the battery has been recharged by an Interstate Batteries wholesale Distributor, then there will be another date code on the cover of the battery. It will either be a two-digit code that is branded into the cover or on a small, round label on the cover. In each case, the code will be read in the same way as listed above.
Reading the date code on an Interstate battery with a part number beginning with “U”
The date code on Interstate batteries, which start with the letter "U" such as the U2200, contains three digits. The code is engraved into the positive terminal. The code will read the same as listed above.
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