Thank you for the information and your question. Unfortunately what you described is indeed a battery under California law. There need only be a touching that is harmful or
offensive. The slightest touch is sufficient for a battery if it is done in a (1) rude, (2) angry, or (3) disrespectful manner. There are defenses, but your situation does not support a defense under the law. You can read much more about the charge and what the prosecutor has to prove by going to: http://www.shouselaw.com/battery.html
That said, I would highly recommend that you hire a criminal
defense attorney to assist you in this case. The reason I say that is that if you are convicted it is a misdemeanor
criminal conviction and can affect your job prospects, etc. In addition, your attorney can help you at least obtain a better sentence
even if you do plead guilty. They might be able to get you in a pretrial diversion program that if you complete it successfully could result in a dismissal of the charges. If you cannot afford an attorney, you can ask the court
to appoint you a public defender and if you qualify financially, they will do that.
Please let me know if you have any related follow up questions. I would be glad to assist you further if I can.