# 2020 Mazda 3 New battery drained twice for no apparent reason **URL:** \ **Category:** General Discussion\ **Tags:** mazda3, mazda\ **Created:** [June 17, 2025, 7:41pm UTC](https://community.cartalk.com/t/2020-mazda-3-new-battery-drained-twice-for-no-apparent-reason/200706 "2025-06-17T19:41:14Z")\ **Posts on this page:** 1\ **Showing post:** 12
**Author:** ![davesmopar](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/davesmopar/32/41750_2.png) [@davesmopar](https://community.cartalk.com/u/davesmopar)\ **Post date:** [August 3, 2025, 2:43pm UTC](https://community.cartalk.com/t/2020-mazda-3-new-battery-drained-twice-for-no-apparent-reason/200706/12 "2025-08-03T14:43:42Z")
The OP was asked questions that needed answer for us to help out, as well as given great advise to do/check and the only reply the OP made was that they threw another battery at it and it did the same thing… It seems that the OP is not really interested in help at this point… OP, some say the definition of insanity is to keep doing the same thing hoping for a different result… You have now installed 4 NEW battery’s with the same thing still happening… Here, Mustangman posted this a while back, it applies to you also.. Unless you are buying battery’s in a dark alley from a shady character out of the back of his van… lol > [@Battery is slowly draining](https://community.cartalk.com/t/battery-is-slowly-draining/192709/2): > > Watch this [[Battery Dies Everyday: Testing For Parasitic Draw] ](https://www.youtube.com/watch?v=eGz9BRJ09Rw) or this [[The BEST Way TO Perform a Parasitic Draw Test] ](https://www.youtube.com/watch?v=lRcj1fQcWwU) or this [[How To Perform a Parasitic Draw Test - EricTheCarGuy] ](https://www.youtube.com/watch?v=KF1gijj03_0&t=71s) But I will say a late model car with a less-than-new battery will do this even with nothing wrong. I’m currently (pun intended) charging my car right now because of this. --- _[View the full topic](https://community.cartalk.com/t/2020-mazda-3-new-battery-drained-twice-for-no-apparent-reason/200706)._