According to Bloomberg, Apple is taking a number of iPod, iPhone, and iPad accessory makers to court, filing a complaint that says “many are of inferior quality and reliability, raising significant concerns over compatibility with and damage to Apple’s products.”

One example cited in the report was of a user complaining that a battery charger actually drained the battery, rather the charging it like the product description stated.

The report mentions that Apple makes around a 20 to 25% revenue from licensed accessories under the “Made for iPod” brand. However, unauthorized vendors, the ones targeted in this case, who create accessories without the “Made for iPod” brand, deprive Apple of those revenues, but also validate the company’s patents.

The lawsuit currently names six companies: Accstation, Boxware Corporation, Crazyondigital, Eforcity Corporation, Everydaysource, Itrimming, and United Integral, but Apple may list up to 20 additional unauthorized companies.

The lawsuit was filed on July 22nd, 2010 in a federal court in San Francisco.